48°16′26″N 14°20′00″E / 48.27389°N 14.33333°E / 48.27389; 14.33333
141-609: Voestalpine AG – stylized as voestalpine – is an Austrian steel-based technology and capital goods group based in Linz , Austria . The company is active in steel , automotive , railway systems , profilform and tool steel industries. As of 2017, it is one of the few profitable steel companies in Europe. 45 percent of its workforce is based in Austria. The Linz hot strip mill is a "fully integrated steel works" operated by voestalpine Stahl GmbH,
282-412: A BOS process is manufactured in one-twelfth the time. Today, electric arc furnaces (EAF) are a common method of reprocessing scrap metal to create new steel. They can also be used for converting pig iron to steel, but they use a lot of electrical energy (about 440 kWh per metric ton), and are thus generally only economical when there is a plentiful supply of cheap electricity. The steel industry
423-531: A brittle alloy commonly called pig iron . Alloy steel is steel to which other alloying elements have been intentionally added to modify the characteristics of steel. Common alloying elements include: manganese , nickel , chromium , molybdenum , boron , titanium , vanadium , tungsten , cobalt , and niobium . Additional elements, most frequently considered undesirable, are also important in steel: phosphorus , sulphur , silicon , and traces of oxygen , nitrogen , and copper . Plain carbon-iron alloys with
564-684: A carbon-intermediate steel by the 1st century AD. There is evidence that carbon steel was made in Western Tanzania by the ancestors of the Haya people as early as 2,000 years ago by a complex process of "pre-heating" allowing temperatures inside a furnace to reach 1300 to 1400 °C. Evidence of the earliest production of high carbon steel in South Asia is found in Kodumanal in Tamil Nadu ,
705-444: A change of volume. In this case, expansion occurs. Internal stresses from this expansion generally take the form of compression on the crystals of martensite and tension on the remaining ferrite, with a fair amount of shear on both constituents. If quenching is done improperly, the internal stresses can cause a part to shatter as it cools. At the very least, they cause internal work hardening and other microscopic imperfections. It
846-430: A company called Voest-Alpine Stahl AG. In 1990, Österreichische Industrieholding AG (Austrian Industry Holding AG) became Austrian Industries AG as it took the first steps toward privatisation. In 1993, three companies formed from Austrian Industries AG-- Voest-Alpine Technologie AG , and Voest-Alpine Stahl AG, and Böhler-Uddeholm . Privatisation began in 1995, when Voest-Alpine got listed on Vienna Stock Exchange . and
987-428: A ferrite BCC crystal form, but at higher carbon content it takes a body-centred tetragonal (BCT) structure. There is no thermal activation energy for the transformation from austenite to martensite. There is no compositional change so the atoms generally retain their same neighbours. Martensite has a lower density (it expands during the cooling) than does austenite, so that the transformation between them results in
1128-689: A halt on VÖEST program. The controversy spilled into the U. S. Senate, causing delays in Marshall Plan financing for VÖEST. VÖEST received its new slabbing mill but the new hot strip mill was delayed by the opposition of the Pentagon, which feared that VÖEST product would be sold to the Soviet bloc. The Pentagon removed their objections in January 1952, conforming to the consensus of other US agencies. The hot and cold strip mills were, at last, put into operation in 1953. By
1269-583: A hard oxide forms on the metal surface; this is known as stainless steel . Tungsten slows the formation of cementite , keeping carbon in the iron matrix and allowing martensite to preferentially form at slower quench rates, resulting in high-speed steel . The addition of lead and sulphur decrease grain size, thereby making the steel easier to turn , but also more brittle and prone to corrosion. Such alloys are nevertheless frequently used for components such as nuts, bolts, and washers in applications where toughness and corrosion resistance are not paramount. For
1410-445: A hard but brittle martensitic structure. The steel is then tempered, which is just a specialized type of annealing, to reduce brittleness. In this application the annealing (tempering) process transforms some of the martensite into cementite, or spheroidite and hence it reduces the internal stresses and defects. The result is a more ductile and fracture-resistant steel. When iron is smelted from its ore, it contains more carbon than
1551-434: A higher than 2.1% carbon content are known as cast iron . With modern steelmaking techniques such as powder metal forming, it is possible to make very high-carbon (and other alloy material) steels, but such are not common. Cast iron is not malleable even when hot, but it can be formed by casting as it has a lower melting point than steel and good castability properties. Certain compositions of cast iron, while retaining
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#17328581347661692-520: A lesser extent between either club and/or VfL Bochum , MSV Duisburg or Rot-Weiss Essen ( kleines Revierderby ). With 22 universities and colleges and more than 250,000 students, the Ruhr region has the highest density of further education establishments anywhere in Germany. These include five universities alone in the cities of Bochum, Duisburg, Dortmund, Essen and Witten . In addition, Folkwang University of
1833-432: A map, the Ruhr could be considered a single city, since there are no visible breaks between the individual city boroughs. Thus the Ruhr is described as a polycentric urban area, which shares a similar history of urban and economic development. Because of its history, the Ruhr is structured differently from monocentric urban regions such as Munich , which developed through the rapid absorption of smaller towns and villages by
1974-412: A narrow range of concentrations of mixtures of carbon and iron that make steel, several different metallurgical structures, with very different properties can form. Understanding such properties is essential to making quality steel. At room temperature , the most stable form of pure iron is the body-centred cubic (BCC) structure called alpha iron or α-iron. It is a fairly soft metal that can dissolve only
2115-420: A non-aggression pact with Germany. During World War II, the bombing of the Ruhr in 1940–1944 caused a loss of 30% of plant and equipment (compared to 15–20% for German industry as a whole). A second battle of the Ruhr (6/7 October 1944 – end of 1944) began with an attack on Dortmund . The devastating bombing raids of Dortmund on 12 March 1945 with 1,108 aircraft – 748 Lancasters, 292 Halifaxes, 68 Mosquitos –
2256-617: A part of the steel division of voestalpine AG. In addition to Linz the most important plants are in Leoben in Styria and in Krems in Lower Austria . It had a large plant at Liezen in Styria which closed in the 1990s. Voestalpine is responsible for 10% of all Austrian CO 2 emissions , which makes it the biggest emitter in the country. The name of the company amalgamates its two principal components,
2397-720: A population of approximately 612,065), Essen (about 583,000) and Duisburg (about 497,000). In the Middle Ages, the Hellweg was an important trade route from the region of the Lower Rhine to the mountains of the Teutoburg Forest . The most important towns of the region from Duisburg to the imperial city of Dortmund were concentrated along the Hellweg from the Rhineland to Westphalia . Since
2538-590: A port. With the construction of the Cologne-Minden railway in the late 19th century, several iron works were built within the borders of the present-day city of Oberhausen . Moreover, the urbanization also boosted the expansion of railroad connections. At the beginning of the 1880s, agricultural regions did not benefit from the newly built transport facilities as much as non-agricultural regions did. This in its turn increased inequality, and made anthropometric measurements, e.g. height, more dependent on wages . In
2679-534: A small concentration of carbon, no more than 0.005% at 0 °C (32 °F) and 0.021 wt% at 723 °C (1,333 °F). The inclusion of carbon in alpha iron is called ferrite . At 910 °C, pure iron transforms into a face-centred cubic (FCC) structure, called gamma iron or γ-iron. The inclusion of carbon in gamma iron is called austenite. The more open FCC structure of austenite can dissolve considerably more carbon, as much as 2.1%, (38 times that of ferrite) carbon at 1,148 °C (2,098 °F), which reflects
2820-448: A steel's final rolling, it is heat treated for strength; however, this is relatively rare. Steel was known in antiquity and was produced in bloomeries and crucibles . The earliest known production of steel is seen in pieces of ironware excavated from an archaeological site in Anatolia ( Kaman-Kalehöyük ) which are nearly 4,000 years old, dating from 1800 BC. Wootz steel
2961-715: A subject of a debate between the Department of State , which advocated nationalization , and the U. S. Army , represented by Mark W. Clark , who stood for privatization. The diplomats prevailed, and the Austrian government was allowed to nationalize the former German assets at will. The mills of Linz were nationalized in July 1946 as the VÖEST ( V ereinigte Ö sterreichische E isen und St ahlwerke, United Austrian Iron and Steelworks). VÖEST decided to dispose with three of its six blast furnaces . One
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#17328581347663102-477: A subsequent step. Other materials are often added to the iron/carbon mixture to produce steel with the desired properties. Nickel and manganese in steel add to its tensile strength and make the austenite form of the iron-carbon solution more stable, chromium increases hardness and melting temperature, and vanadium also increases hardness while making it less prone to metal fatigue . To inhibit corrosion, at least 11% chromium can be added to steel so that
3243-672: Is continuously cast into long slabs, cut and shaped into bars and extrusions and heat treated to produce a final product. Today, approximately 96% of steel is continuously cast, while only 4% is produced as ingots. The ingots are then heated in a soaking pit and hot rolled into slabs, billets , or blooms . Slabs are hot or cold rolled into sheet metal or plates. Billets are hot or cold rolled into bars, rods, and wire. Blooms are hot or cold rolled into structural steel , such as I-beams and rails . In modern steel mills these processes often occur in one assembly line , with ore coming in and finished steel products coming out. Sometimes after
3384-596: Is a polycentric urban area in North Rhine-Westphalia , Germany . With a population density of 2,800/km and a population of over 5 million (2017), it is the largest urban area in Germany and the third of the European Union . It consists of several large cities bordered by the rivers Ruhr to the south, Rhine to the west, and Lippe to the north. In the southwest it borders the Bergisches Land . It
3525-456: Is a UK-based cold roll-forming company which was acquired by voestalpine AG in 1998. The company is based in Oldbury , and makes metal products for the construction and manufacturing industries. It was established in 1931 and is now (since 2014) known as voestalpine Metsec plc. Voestalpine Signaling UK, previously known as CDSRail, produce diagnostic and monitoring infrastructure for rail. It
3666-629: Is also very reusable: it is one of the world's most-recycled materials, with a recycling rate of over 60% globally . The noun steel originates from the Proto-Germanic adjective * * stahliją or * * stakhlijan 'made of steel', which is related to * * stahlaz or * * stahliją 'standing firm'. The carbon content of steel is between 0.02% and 2.14% by weight for plain carbon steel ( iron - carbon alloys ). Too little carbon content leaves (pure) iron quite soft, ductile, and weak. Carbon contents higher than those of steel make
3807-416: Is always the main element in steel, but many other elements may be present or added. Stainless steels , which are resistant to corrosion and oxidation , typically need an additional 11% chromium . Iron is the base metal of steel. Depending on the temperature, it can take two crystalline forms (allotropic forms): body-centred cubic and face-centred cubic . The interaction of the allotropes of iron with
3948-403: Is common for quench cracks to form when steel is water quenched, although they may not always be visible. There are many types of heat treating processes available to steel. The most common are annealing , quenching , and tempering . Annealing is the process of heating the steel to a sufficiently high temperature to relieve local internal stresses. It does not create a general softening of
4089-536: Is considered part of the larger Rhine-Ruhr metropolitan region of more than 10 million people, which is the third largest in Western Europe , behind only London and Paris . The Ruhr cities are, from west to east: Duisburg , Oberhausen , Bottrop , Mülheim an der Ruhr , Essen , Gelsenkirchen , Bochum , Herne , Hagen , Dortmund , Hamm and the districts of Wesel , Recklinghausen , Unna and Ennepe-Ruhr-Kreis . The most populous cities are Dortmund (with
4230-403: Is desirable. To become steel, it must be reprocessed to reduce the carbon to the correct amount, at which point other elements can be added. In the past, steel facilities would cast the raw steel product into ingots which would be stored until use in further refinement processes that resulted in the finished product. In modern facilities, the initial product is close to the final composition and
4371-405: Is extracted from iron ore by removing the oxygen through its combination with a preferred chemical partner such as carbon which is then lost to the atmosphere as carbon dioxide. This process, known as smelting , was first applied to metals with lower melting points, such as tin , which melts at about 250 °C (482 °F), and copper , which melts at about 1,100 °C (2,010 °F), and
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4512-408: Is heat treated to contain both a ferritic and martensitic microstructure to produce a formable, high strength steel. Transformation Induced Plasticity (TRIP) steel involves special alloying and heat treatments to stabilize amounts of austenite at room temperature in normally austenite-free low-alloy ferritic steels. By applying strain, the austenite undergoes a phase transition to martensite without
4653-845: Is now Cognor Stahlhandel, still based in Linz and part of the Cognor Group, a division of Zlomrex S.A. Capital Group. In April 2007, voestalpine made a bid for 20.95 percent of the Austrian tool steel producer Böhler-Uddeholm , which was created in 1991 from the merger of Böhler Group and Swedish Uddeholm Group, the latter acquired by Voest-Alpine Stahl AG in 1990. The combined company was one of three created from Austrian Industries AG in 1993. By June, voestalpine held 55 percent of voting stock after "the largest acquisition in Austria’s industrial history", worth two billion Euros . In March 2008, voestalpine said it owned 90.24% of Böhler-Uddehom and intended to buy
4794-687: Is often considered an indicator of economic progress, because of the critical role played by steel in infrastructural and overall economic development . In 1980, there were more than 500,000 U.S. steelworkers. By 2000, the number of steelworkers had fallen to 224,000. The economic boom in China and India caused a massive increase in the demand for steel. Between 2000 and 2005, world steel demand increased by 6%. Since 2000, several Indian and Chinese steel firms have expanded to meet demand, such as Tata Steel (which bought Corus Group in 2007), Baosteel Group and Shagang Group . As of 2017 , though, ArcelorMittal
4935-544: Is one of the world's most-recycled materials, with a recycling rate of over 60% globally; in the United States alone, over 82,000,000 metric tons (81,000,000 long tons; 90,000,000 short tons) were recycled in the year 2008, for an overall recycling rate of 83%. As more steel is produced than is scrapped, the amount of recycled raw materials is about 40% of the total of steel produced - in 2016, 1,628,000,000 tonnes (1.602 × 10 long tons; 1.795 × 10 short tons) of crude steel
5076-445: Is really no uniform regiolect that justifies designation as a single regiolect. It is rather a working-class sociolect with influences from the various dialects found in the area and changing even with the professions of the workers. A major common influence stems from the coal mining tradition of the area. For example, quite a few locals prefer to call the Ruhr either "Pott", which is a derivate of "Pütt" (pitmen's term for mine ; cp.
5217-540: Is still using the traditional term. In the same year, "Objections by the United States to discriminatory regulations on exports from the occupied region of the Ruhr" was published in Papers Relating to the Foreign Relations of the United States . The 1926 Encyclopædia Britannica , in addition to its article on the river Ruhr, has a further article on "RUHR, the name given to a district of Westphalia, Germany". Thus
5358-730: Is the Klavier-Festival Ruhr in the Ruhr area with 50 to 80 events of classical and jazz music. With more than 50 museums, Ruhr has one of the largest variety of museums in Europe. Industrial Museum The city of Essen (representing the Ruhr) was selected as European Capital of Culture for 2010 by the Council of the European Union . In association football , the Revierderby is the rivalry between Borussia Dortmund and FC Schalke 04 , and to
5499-667: Is the roll forming division of voestalpine AG. The company has supplied parts for the aerospace industry since 1949 and for Boeing airplanes since 1969. It also supplies NASA and McDonnell Douglas . Products also include model train tracks and gymnasium bleachers . At first the company made aluminum parts for airplane structures, but in the late 1980s, Roll Forming added preparing parts for assembly. The company still uses this process for Spirit AeroSystems , which puts together stringers for many of Boeing's larger planes. Other locations for Roll Forming are Jeffersonville, Indiana and Farrell, Pennsylvania . Roll Forming agreed to
5640-529: Is the world's largest steel producer . In 2005, the British Geological Survey stated China was the top steel producer with about one-third of the world share; Japan , Russia , and the United States were second, third, and fourth, respectively, according to the survey. The large production capacity of steel results also in a significant amount of carbon dioxide emissions inherent related to
5781-570: The Czechoslovak coup d'état of 1948 . VÖEST assets became the principal Austrian recipient of the Marshall Plan aid but access to American cash came only after a protracted political battle within Austrian establishment. Geoffrey Keyes had to recruit steel expert William E. Brewster to sort through the Austrian proposals. Brewster supported the Austrian four-year plan but its key opponent Franz Nemchak called it "a colossal stupidity" and demanded
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5922-645: The Dawes Plan , which led to the withdrawal of the French and Belgian troops from the Ruhr in 1925. However, the occupation of the Ruhr caused several direct and indirect consequences to the German economy and government, including accelerating the growth of right wing parties due to the Weimar government's inability to successfully resolve the problem. On 7 March 1936, Adolf Hitler took a massive gamble by sending 30,000 troops into
6063-729: The European Route of Industrial Heritage in the Ruhr area. Ruhr is known for its numerous cultural institutions, many of which enjoy international reputation. Ruhr has three major opera houses and more than 10 theaters and stages. There are special classical music halls like the Bochumer Symphoniker, the Duisburg Mercatorhalle, the Saalbau Essen or the Dortmunder Philharmoniker . Each year in spring time, there
6204-631: The Golconda area in Andhra Pradesh and Karnataka , regions of India , as well as in Samanalawewa and Dehigaha Alakanda, regions of Sri Lanka . This came to be known as wootz steel , produced in South India by about the sixth century BC and exported globally. The steel technology existed prior to 326 BC in the region as they are mentioned in literature of Sangam Tamil , Arabic, and Latin as
6345-732: The International Labour Office published a report entitled Coal Production in the Ruhr District . In 1923, the Canadian Commercial Intelligence Journal , Volume 28, Issue 1013, includes the article, "Exports from the Ruhr district of Germany". In 1924 the English and American press was still talking of the "French occupation of the Ruhr Valley" or "Ruhr District". A 62-page publication seems to be responsible for
6486-492: The United Kingdom . It has been claimed that immigrants came to the Ruhr from over 140 countries. Almost all their descendants today speak German as a first language, and for various reasons, they do not identify with their Polish roots and traditions, often their Polish family names only remain as a sign of their past. The Industrial Heritage Trail ( German : Route der Industriekultur ) links tourist attractions related to
6627-567: The bow echo that hit the cities on June 9, 2014, and caused tens of thousands of trees to fall which was publicly dubbed the "Pfingststurm" (German for "Whitsun storm"). Winters have become more mild which poses a risk for crops such as apples whose blooms are vulnerable to late freezes if bud break happens too early. The ten largest cities of the Ruhr: The local regiolect of German is commonly called Ruhrdeutsch ( Ruhrgebietsdeutsch, Ruhrpottdeutsch, Ruhrpottisch, Ruhrpöttisch ) although there
6768-586: The cementation process was described in a treatise published in Prague in 1574 and was in use in Nuremberg from 1601. A similar process for case hardening armour and files was described in a book published in Naples in 1589. The process was introduced to England in about 1614 and used to produce such steel by Sir Basil Brooke at Coalbrookdale during the 1610s. The raw material for this process were bars of iron. During
6909-419: The hardness , quenching behaviour , need for annealing , tempering behaviour , yield strength , and tensile strength of the resulting steel. The increase in steel's strength compared to pure iron is possible only by reducing iron's ductility. Steel was produced in bloomery furnaces for thousands of years, but its large-scale, industrial use began only after more efficient production methods were devised in
7050-590: The iron ore pits in Erzberg and a steel mill in Donawitz. The company also owned smaller businesses and railroads in the Mur River valley and in Lower Austria ( Krems and Schwechat ). Alpine, chaired by Karl Wittgenstein , peaked in 1912, when it owned four coal mines, two iron ore mines and six metallurgical plants. In 1922, fifty-six percent of Alpine Montangesellschaft, then owned by Fiat (see Camillo Castiglioni ),
7191-445: The 17th century, it was realized that the best steel came from oregrounds iron of a region north of Stockholm , Sweden. This was still the usual raw material source in the 19th century, almost as long as the process was used. Crucible steel is steel that has been melted in a crucible rather than having been forged , with the result that it is more homogeneous. Most previous furnaces could not reach high enough temperatures to melt
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#17328581347667332-470: The 17th century, the first step in European steel production has been the smelting of iron ore into pig iron in a blast furnace . Originally employing charcoal, modern methods use coke , which has proven more economical. In these processes, pig iron made from raw iron ore was refined (fined) in a finery forge to produce bar iron , which was then used in steel-making. The production of steel by
7473-558: The 17th century, with the introduction of the blast furnace and production of crucible steel . This was followed by the Bessemer process in England in the mid-19th century, and then by the open-hearth furnace . With the invention of the Bessemer process, a new era of mass-produced steel began. Mild steel replaced wrought iron . The German states were the major steel producers in Europe in
7614-565: The 1920s, to form a green belt between the Ruhr cities from east to west. During the Middle Ages, much of the region that was later called the Ruhrgebiet was situated in the County of Mark , the Duchies of Cleves and Berg and the territories of the bishop of Münster and the archbishop of Cologne . The region included some villages and castles, and was mainly agrarian: its loess soil made it one of
7755-414: The 1950s and 1960s, as very rapid economic growth (9% a year) created a heavy demand for coal and steel. After 1973, Germany was hard hit by a worldwide economic crisis, soaring oil prices, and increasing unemployment, which jumped from 300,000 in 1973 to 1.1 million in 1975. The Ruhr region was hardest hit, as the easy-to-reach coal mines became exhausted, and German coal was no longer competitive. Likewise
7896-516: The 19th century, these cities have grown together into a large complex with a vast industrial landscape, inhabited by some 7.3 million people (including Düsseldorf and Wuppertal , large cities that are nearby but officially not part of the Ruhr area). The Ruhr area has no administrative centre; each city in the area has its own administration, although there is a supracommunal Ruhr Regional Association [ de ] institution in Essen. For 2010,
8037-475: The 19th century. American steel production was centred in Pittsburgh , Bethlehem, Pennsylvania , and Cleveland until the late 20th century. Currently, world steel production is centered in China, which produced 54% of the world's steel in 2023. Further refinements in the process, such as basic oxygen steelmaking (BOS), largely replaced earlier methods by further lowering the cost of production and increasing
8178-452: The 45% Vossloh share in VAE was bought by Voest-Alpine for €140 million, and in 2003 VAE Group GmbH became a subsidiary of voestalpine Bahnsysteme division. In 2001, the name of Voest-Alpine Stahl Group changed to voestalpine AG in order to fit the standard naming pattern of Austrian public corporations. During 2006, Voestalpine decided to dispose of its steel trading group. Voestalpine Stahlhandel
8319-583: The Agreement for Mutual Enforcement of Debarment Decisions. Steel industry Steel is an alloy of iron and carbon with improved strength and fracture resistance compared to other forms of iron. Because of its high tensile strength and low cost, steel is one of the most commonly manufactured materials in the world. Steel is used in buildings, as concrete reinforcing rods, in bridges, infrastructure, tools, ships, trains, cars, bicycles, machines, electrical appliances, furniture, and weapons. Iron
8460-696: The Allied bombers levelled most of Linz, too. During 1945, Allied-occupied Austria was partitioned into four occupation zones; the heavy industries of the former Reichswerke concentrated in the American (Linz) and British (Erzberg) zones. The future of Linz was debated in 1945–1946. Local government of Styria and the British objected to reconstruction of Linz works, calling it the white elephant , too far from coal and ore reserves, and too large to be economical. The American authorities at first concurred and suggested to reduce
8601-600: The Arabs from Persia, who took it from India. It was originally created from several different materials including various trace elements , apparently ultimately from the writings of Zosimos of Panopolis . In 327 BC, Alexander the Great was rewarded by the defeated King Porus , not with gold or silver but with 30 pounds of steel. A recent study has speculated that carbon nanotubes were included in its structure, which might explain some of its legendary qualities, though, given
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#17328581347668742-658: The Arts is an internationally acclaimed art college with its base in the Ruhr region. Furthermore, the universities are not the only places in the Ruhr region where academic qualifications can be obtained. There are 17 different universities of applied sciences which offer students to have the opportunity to undertake practice-relevant and qualified studies in various subjects, such as economics, logistics, administration or management. The Ruhr area has 5 major universities in 6 cities with about 120,000 students. The three largest universities (Ruhr University Bochum, TU Dortmund University, and
8883-458: The English "pit"), or "Revier". During the nineteenth century, the Ruhr attracted up to 500,000 ethnic Poles , Masurians and Silesians from East Prussia and Silesia in a migration known as Ostflucht (flight from the east). By 1925, the Ruhrgebiet had around 3,800,000 inhabitants. Most of the new inhabitants came from Eastern Europe, but immigrants also came from France , Ireland , and
9024-542: The Linz works to eight coke ovens under Alpine-Mountain management, dismantle the furnaces and use the parts for the needed repairs in Donawitz (Styria). The Soviets voted to dismantle Linz altogether. The Austrian national government carefully persuaded the Americans to save Linz. In the summer of 1946, when allied negotiations on Linz reached a stalemate, the Americans decided to restore Linz unilaterally, regardless of British or Soviet opinion. Tactics of reconstruction became
9165-463: The Linz-Donawitz process of basic oxygen steelmaking (BOS), developed in 1952, and other oxygen steel making methods. Basic oxygen steelmaking is superior to previous steelmaking methods because the oxygen pumped into the furnace limited impurities, primarily nitrogen, that previously had entered from the air used, and because, with respect to the open hearth process, the same quantity of steel from
9306-598: The Nazi leadership openly broke with the steel barons and settled for state control over iron and steel production. In the same year Hermann Göring expressed his desire to control Austrian iron reserves at Erzberg. After the Anschluss state-owned Reichswerke Hermann Göring purchased a 13% share in Alpine, and for the next six months wrestled with the VS over control of the company. In March 1939,
9447-432: The Rhine. The Rhine itself runs through the heart of the Ruhr district." According to Merriam Webster's Geographical Dictionary , a standard reference on place names around the world, the name "Ruhr" refers to the river. The name preferred for the region in this dictionary is "Ruhrgebiet", followed by "Ruhr Valley". The urban landscape of the Ruhr extends from the Lower Rhine Basin east to the Westphalian Plain and south to
9588-426: The Rhineland . As Hitler and other Nazis admitted, the French army alone could have destroyed the Wehrmacht . The French passed the problem to the British, who found that the Germans had the right to "enter their own backyard", and no action was taken. In the League of Nations , the Soviet delegate Maxim Litvinov was the only one who proposed economic sanctions against Germany. All restraint on German rearmament
9729-472: The Ruhr region was one of the European Capitals of Culture . The 1911 edition of Encyclopædia Britannica has only one definition of "Ruhr": "a river of Germany, an important right-bank tributary of the lower Rhine". The use of the term "Ruhr" for the industrial region started in Britain only after World War I, when French and Belgian troops had occupied the Ruhr district and seized its prime industrial assets in lieu of unpaid reparations in 1923. In 1920,
9870-583: The Ruhr steel industry went into sharp decline, as its prices were undercut by lower-cost suppliers such as Japan. The welfare system provided a safety net for the large number of unemployed workers, and many factories reduced their labor force and began to concentrate on high-profit specialty items. As demand for coal decreased after 1958, the area went through phases of structural crisis (see steel crisis ) and industrial diversification, first developing traditional heavy industry, then moving into service industries and high technology. The air and water pollution of
10011-537: The Ruhr's coal and steel industries, was created as a condition for the establishment of the Federal Republic of Germany . During the Cold War , the Western allies anticipated that any Red Army thrust into Western Europe would begin in the Fulda Gap and have the Ruhr as a primary target. Increased German control of the area was limited by the pooling of German coal and steel into the multinational European Coal and Steel Community in 1951. The nearby Saar region , containing much of Germany's remaining coal deposits,
10152-508: The Ruhr, who were known as Ruhrpolen since. The Poles were treated as second class citizens. In 1899 this led to a revolt in Herne of young Polish workers, who later established a Workers' Union. Skilled workers in the mines were often housed in "miners' colonies", built by the mining firms. By 1870, over 3 million people lived in the Ruhrgebiet and the new coal-mining district had become the largest industrial region of Europe. During World War I
10293-427: The Ruhr. By 1950, after the virtual completion of the by-then much watered-down "level of industry" plans, equipment had been removed from 706 manufacturing plants in the west, and steel production capacity had been reduced by 6.7 million tons. Dismantling finally ended in 1951. In all, less than 5% of the industrial base was dismantled. The Ruhr was at the centre of the German economic miracle Wirtschaftswunder of
10434-514: The Ruhrgebiet functioned as Germany's central weapon factory. At a big Essen company, F. Krupp A.G., the number of employees rose from 40,000 to 120,000 or more, in four years. They were partly women, partly forced labourers. In the March 1920 Kapp Putsch , nationalist and monarchist elements with the armed support of Freikorps units attempted to overthrow the government of the Weimar Republic . It
10575-567: The United States. The Birmingham, Alabama plant opened in 1992, followed by the Cheyenne, Wyoming plant in 1997, now the company's headquarters. As a result of two 2004 acquisitions, Nortrak has other U.S. facilities in Pueblo, Colorado ; Newton, Kansas and Chicago Heights, Illinois ; and Seattle , Washington . Roll Forming Corp., incorporated in 1947 and headquartered in Shelbyville, Kentucky ,
10716-607: The University of Duisburg-Essen) opened an alliance called " UA Ruhr ". Students enrolled at one of the UA Ruhr universities can attend lectures and seminars at all three institutions without having to pay a visiting student fee. Consequently, they have many options to specialize in and to explore their chosen disciplines in depth. The UA Ruhr has three liaison offices for interested students in New York City , Moscow and São Paulo . With
10857-480: The VS stepped aside and the Reichswerke acquired 70% share of Alpine in exchange for a 10% share in the new plant in Linz . In June 1939, its name was changed to Alpine Montan AG Hermann Göring . The Reichswerke continued acquisitions and outright confiscations, and soon controlled around half of Austrian heavy industries. In 1944, the peak year for Alpine, its sales reached 371 million ℛ︁ℳ︁ , 16% of
10998-468: The Versailles Treaty. The German government responded with a policy of passive resistance, letting workers and civil servants refuse orders and instructions by the occupation forces. Production and transport came to a standstill and the financial consequences contributed to German hyperinflation . After passive resistance was called off in late 1923, Germany implemented a currency reform and negotiated
11139-610: The VÖEST (Vereinigte Österreichische Eisen und Stahlwerke) in Upper Austria , established through nationalization in July 1946, and the ÖAMG (Österreichische-Alpine Montangesellschaft) in Styria , established in 1881. The Alpine Montangesellschaft (English: Alpine Mining Society) was founded in Vienna on 19 July 1881, as a vehicle of consolidating Austrian iron and steel assets. Some of these assets were later depleted, abandoned or sold. The core assets that remained concentrated in Styria :
11280-500: The VÖEST and the ÖAMG committed to building their first 30-ton oxygen converters. They were put into operation in November 1952 and May 1953 and temporarily created a surge in steel-related research. Thirty-four thousand businesspeople and engineers visited the VÖEST converter by 1963. The LD process reduced processing time and capital costs per ton of steel, contributing to the competitive advantage of Austrian steel. However, errors made by
11421-470: The VÖEST and the ÖAMG management in licensing their technology made control over its adoption elsewhere impossible and, by the end of the 1950s, the Austrians had lost their competitive edge. VÖEST was merged with Österreichisch-Alpine Montangesellschaft and other companies in the 1970s, and the resulting company took the name Vöest-Alpine AG. Restructuring of Austria's nationalised industries by 1988 produced
11562-503: The addition of heat. Twinning Induced Plasticity (TWIP) steel uses a specific type of strain to increase the effectiveness of work hardening on the alloy. Ruhr The Ruhr ( / ˈ r ʊər / ROOR ; German : Ruhrgebiet [ˈʁuːɐ̯ɡəˌbiːt] , also Ruhrpott German pronunciation: [ˈʁuːɐ̯pɔt] ), also referred to as the Ruhr area , sometimes Ruhr district , Ruhr region , or Ruhr valley ,
11703-401: The alloying elements, primarily carbon, gives steel and cast iron their range of unique properties. In pure iron, the crystal structure has relatively little resistance to the iron atoms slipping past one another, and so pure iron is quite ductile , or soft and easily formed. In steel, small amounts of carbon, other elements, and inclusions within the iron act as hardening agents that prevent
11844-516: The area are largely a thing of the past although some issues take a long time to solve. In 2005 Essen was the official candidate for nomination as European Capital of Culture for 2010. The Ruhr has an oceanic climate in spite of its inland position, with winds from the Atlantic travelling over the lowlands to moderate temperature extremes, in spite of its relatively northerly latitude that sees significant variety in daylight hours. A consequence of
11985-589: The areas, as presently constituted, in Land North Rhine–Westphalia, listed in the Annex to this Agreement." However, Lawrence K. Cecil and Philip Hauge Abelson still write in 1967: "In the first place, the average person uses the term 'Ruhr' indiscriminately as the Ruhr River or the Ruhr district, two entirely different things. The Ruhr River is only one of half a dozen rivers in the Ruhr district, in addition to
12126-436: The austenite grain boundaries until the percentage of carbon in the grains has decreased to the eutectoid composition (0.8% carbon), at which point the pearlite structure forms. For steels that have less than 0.8% carbon (hypoeutectoid), ferrite will first form within the grains until the remaining composition rises to 0.8% of carbon, at which point the pearlite structure will form. No large inclusions of cementite will form at
12267-471: The austenite is for it to precipitate out of solution as cementite , leaving behind a surrounding phase of BCC iron called ferrite with a small percentage of carbon in solution. The two, cementite and ferrite, precipitate simultaneously producing a layered structure called pearlite , named for its resemblance to mother of pearl . In a hypereutectoid composition (greater than 0.8% carbon), the carbon will first precipitate out as large inclusions of cementite at
12408-474: The bigger European cities as Amsterdam , Brussels , Paris , Vienna or Zürich . The Ruhr area also contains the longest tram system in the world, with tram and Stadtbahn services from Witten to Krefeld as well as the Rhine-Ruhr S-Bahn network. Originally the system was even bigger, it was possible to travel from Unna to Bad Honnef without using railway or bus services. The Ruhr has one of
12549-530: The borders between cities in the central Ruhr are unrecognizable, blending into one urban landscape due to continuous development across them. The replanting of brownfield land has created new parks and recreation areas in recent decades. The Emscher Landschaftspark (Emscher Landscape Park) lies along the river Emscher , formerly virtually an open sewer, parts of which have undergone natural restoration. This park connects strips of parkland running from north to south, which were developed through regional planning in
12690-494: The boundaries in hypoeutectoid steel. The above assumes that the cooling process is very slow, allowing enough time for the carbon to migrate. As the rate of cooling is increased the carbon will have less time to migrate to form carbide at the grain boundaries but will have increasingly large amounts of pearlite of a finer and finer structure within the grains; hence the carbide is more widely dispersed and acts to prevent slip of defects within those grains, resulting in hardening of
12831-455: The combination, bronze, which has a melting point lower than 1,083 °C (1,981 °F). In comparison, cast iron melts at about 1,375 °C (2,507 °F). Small quantities of iron were smelted in ancient times, in the solid-state, by heating the ore in a charcoal fire and then welding the clumps together with a hammer and in the process squeezing out the impurities. With care, the carbon content could be controlled by moving it around in
12972-462: The company did not do well because of high energy prices and cheaper foreign steel. During 1986, Voest-Alpine sold its interest to R.S.R. Corporation. In addition, Voestalpine AG owned a portion of Voest-Alpine Industrieanlagenbau (VAI), whose Voest-Alpine Industries subsidiary had its American headquarters in Pittsburgh , Pennsylvania . Siemens purchased VAI parent VA Tech in 2005. Metsec plc, previously known as Metal Sections and TI Metsec ,
13113-429: The densest motorway networks in all of Europe, with dozens of Autobahns and similar Schnellstraßen (expressways) crossing the region. The Autobahn network is built in a grid network, with four east–west ( A2 , A40 , A42 , A44 ) and seven north–south ( A1 , A3 , A43 , A45 , A52 , A57 , A59 ) routes. The A1, A2 and A3 are mostly used by through traffic, while the other autobahns have a more regional function. Both
13254-448: The economies of melting and casting, can be heat treated after casting to make malleable iron or ductile iron objects. Steel is distinguishable from wrought iron (now largely obsolete), which may contain a small amount of carbon but large amounts of slag . Iron is commonly found in the Earth's crust in the form of an ore , usually an iron oxide, such as magnetite or hematite . Iron
13395-529: The end of 1953, the first phase of reconstruction was complete. In the summer of 1948, VÖEST, ÖAMG and Swiss Roll AG agreed to co-develop the basic oxygen steelmaking process proposed by Robert Durrer (itself a development of Henry Bessemer 's 1858 patent). By June 1949, VÖEST developed an adaptation of Durrer's process, the LD (Linz-Donawitz) process, (German: LD Verfahren; U.S. names: Oxygen Converter Process, Basic Oxygen Furnace Process, BOP, OSM). In December 1949,
13536-612: The exception of public transport companies serving Hamm and Kreis Unna , all such companies in the Ruhr region are run under the umbrella of the Verkehrsverbund Rhein-Ruhr , which provides a uniform ticket system valid for the entire area. The Ruhr region is well-integrated into the national rail system, the Deutsche Bahn , for both passenger and goods services, each city in the region has at least one train stations. The bigger central stations have hourly direct connections to
13677-625: The finest steel in the world exported to the Roman, Egyptian, Chinese and Arab worlds at that time – what they called Seric Iron . A 200 BC Tamil trade guild in Tissamaharama , in the South East of Sri Lanka, brought with them some of the oldest iron and steel artifacts and production processes to the island from the classical period . The Chinese and locals in Anuradhapura , Sri Lanka had also adopted
13818-573: The fire. Unlike copper and tin, liquid or solid iron dissolves carbon quite readily. All of these temperatures could be reached with ancient methods used since the Bronze Age . Since the oxidation rate of iron increases rapidly beyond 800 °C (1,470 °F), it is important that smelting take place in a low-oxygen environment. Smelting, using carbon to reduce iron oxides, results in an alloy ( pig iron ) that retains too much carbon to be called steel. The excess carbon and other impurities are removed in
13959-503: The form of charcoal) in a crucible, was produced in Merv by the 9th to 10th century AD. In the 11th century, there is evidence of the production of steel in Song China using two techniques: a "berganesque" method that produced inferior, inhomogeneous steel, and a precursor to the modern Bessemer process that used partial decarburization via repeated forging under a cold blast . Since
14100-403: The government sold its last shares of the company in 2003. Voest-Alpine Stahl owned 21.25 of Voest-Alpine Technologie, which was the parent company of the former Voest-Alpine plant-building unit Voest-Alpine Industrieanlagenbau , split from the larger company in 1956. During 2001, Voestalpine bought Polynorm, a Bunschoten, Netherlands manufacturer of auto parts, in exchange for $ 118 million. At
14241-599: The hardenability of thick sections. High strength low alloy steel has small additions (usually < 2% by weight) of other elements, typically 1.5% manganese, to provide additional strength for a modest price increase. Recent corporate average fuel economy (CAFE) regulations have given rise to a new variety of steel known as Advanced High Strength Steel (AHSS). This material is both strong and ductile so that vehicle structures can maintain their current safety levels while using less material. There are several commercially available grades of AHSS, such as dual-phase steel , which
14382-484: The hills of the Rhenish Massif . Through the centre of the Ruhr runs a segment of the loess belt that extends across Germany from west to east. Historically, this loess belt has underlain some of Germany's richest agricultural regions. Geologically, the region is defined by coal -bearing layers from the upper Carboniferous period. The coal seams reach the surface in a strip along the river Ruhr and dip downward from
14523-489: The long run, however, effects of the railroad proximity diminished. Consequently, the population climbed rapidly. Towns with only 2,000 to 5,000 people in the early 19th century grew in the following 100 years to over 100,000. Skilled mineworkers were recruited from other regions to the Ruhr's mines and steel mills and unskilled people started to move in. From 1860 onwards there was large-scale migration of Polish speakers from Silesia , Pomerania , East Prussia and Posen to
14664-439: The main production route. At the end of 2008, the steel industry faced a sharp downturn that led to many cut-backs. In 2021, it was estimated that around 7% of the global greenhouse gas emissions resulted from the steel industry. Reduction of these emissions are expected to come from a shift in the main production route using cokes, more recycling of steel and the application of carbon capture and storage technology. Steel
14805-427: The marine influence is a cloudy and wet climate with low sunshine hours. Summers normally average in the low 20s, with winters being somewhat above the freezing point. From the onset of the 21st century, the effects of global warming have become more profound. The area has been affected by severe droughts (like 2018), heat waves with temperatures above 40.0 °C (104.0 °F) (2019) and severe weather events like
14946-450: The most part, however, p-block elements such as sulphur, nitrogen , phosphorus , and lead are considered contaminants that make steel more brittle and are therefore removed from steel during the melting processing. The density of steel varies based on the alloying constituents but usually ranges between 7,750 and 8,050 kg/m (484 and 503 lb/cu ft), or 7.75 and 8.05 g/cm (4.48 and 4.65 oz/cu in). Even in
15087-591: The most significant city among them. Instead in the Ruhr, the individual city boroughs and urban districts of the Ruhr grew in a rapid and parallel fashion independently of one another during the Industrial Revolution . The population density of the central Ruhr is about 2,100 inhabitants per square kilometre (about 5,400 per square mile)—not too high compared to other German cities. Between the constituent urban areas are relatively open suburbs and even some open land with agricultural fields. In many places however,
15228-446: The movement of dislocations . The carbon in typical steel alloys may contribute up to 2.14% of its weight. Varying the amount of carbon and many other alloying elements, as well as controlling their chemical and physical makeup in the final steel (either as solute elements, or as precipitated phases), impedes the movement of the dislocations that make pure iron ductile, and thus controls and enhances its qualities. These qualities include
15369-533: The name "Ruhr" was given to the region (as a short form of "Ruhr District" or "Ruhr Valley") only a few years before the publication of this edition of the Encyclopædia Britannica . Even after World War II, the term "Ruhr" may not have been in general use for the region: it was defined in Documents on American Foreign Relations (1948): "For the purposes of the present Agreement: (i) the expression 'Ruhr' means
15510-459: The nearby Wupper Valley in the Bergisches Land . By around 1820, hundreds of water-powered mills were producing textiles, lumber, shingles and iron in automated processes here. In additional workshops in the hills, highly skilled workers manufactured knives, tools, weapons and harnesses, using water, coal and charcoal. As the machines became bigger and moved from water power to steam power, locally mined coal and charcoal became expensive and there
15651-449: The product but only locally relieves strains and stresses locked up within the material. Annealing goes through three phases: recovery , recrystallization , and grain growth . The temperature required to anneal a particular steel depends on the type of annealing to be achieved and the alloying constituents. Quenching involves heating the steel to create the austenite phase then quenching it in water or oil . This rapid cooling results in
15792-741: The production methods of creating wootz steel from the Chera Dynasty Tamils of South India by the 5th century AD. In Sri Lanka, this early steel-making method employed a unique wind furnace, driven by the monsoon winds, capable of producing high-carbon steel. Since the technology was acquired from the Tamilians from South India, the origin of steel technology in India can be conservatively estimated at 400–500 BC. The manufacture of wootz steel and Damascus steel , famous for its durability and ability to hold an edge, may have been taken by
15933-821: The purchase by Voest-Alpine Krems in 2000, giving the Voest-Alpine Stahl AG subsidiary its first manufacturing facilities in the United States. In the 2010s, the company made a $ 740 million investment in a HBI plant outside Corpus Christi, Texas . Groundbreaking took place in April 2014 and production activity commenced on 28 September 2016. During 2022, the majority stake of the plant was sold to ArcelorMittal . During 1978, Voest-Alpine and other European companies started Bayou Steel Corporation, incorporated in Louisiana in 1979. The first mill opened in LaPlace, Louisiana in 1981, but
16074-426: The quality of the final product. Today more than 1.6 billion tons of steel is produced annually. Modern steel is generally identified by various grades defined by assorted standards organizations . The modern steel industry is one of the largest manufacturing industries in the world, but also one of the most energy and greenhouse gas emission intense industries, contributing 8% of global emissions. However, steel
16215-593: The rebellion in early April 1920 and re-established the Weimar Republic's control of the district. An estimated 1,000 insurgents and 200 Reichswehr soldiers were killed in the battles. In March 1921, French and Belgian troops occupied Duisburg , which under the Treaty of Versailles formed part of the demilitarized Rhineland . In January 1923 the whole Ruhr district was occupied after Germany failed to fulfill part of its World War I reparation payments as agreed in
16356-404: The region's land remains in agricultural use. Forests account for 17.6%, and bodies of water and other types of land use occupy the rest. The inclusion of four mainly rural districts in the otherwise mainly industrial Ruhr helps to explain the large proportion of agricultural and forested land. In addition, the city boroughs of the Ruhr region have outlying districts with a rural character. Seen on
16497-410: The rest. In February 2018, voestalpine started constructing a steel mill in Linz , Austria specifically utilizing 6 MW hydrogen fuel technology instead of coal, which started in late 2019. During 1990, Voest-Alpine Eisenbahnsysteme and Nortrak Railway Supply Ltd. of Richmond, British Columbia , Canada formed a joint venture called VAE Nortrak North America, Inc. , which later added operations in
16638-474: The richer parts of western Germany. The free imperial city of Dortmund was the trading and cultural centre, lying on the Hellweg , an important east–west trading route, that also brought prosperity to the town of Duisburg . Both towns were members of the Hanseatic League . The development of the region into an urbanized industrial area started in the late 18th century with the early industrialisation in
16779-541: The river to the north. Beneath the Lippe, the coal seams lie at a depth of 600 to 800 metres (2,000 to 2,600 feet). The thickness of the coal layers ranges from one to three metres (three to ten feet). This geological feature played a decisive role in the development of coal mining in the Ruhr. According to the Regionalverband Ruhr (RVR, Ruhr Regional Association), 37.6% of the region's area is built up. A total of 40.7% of
16920-401: The steel. At the very high cooling rates produced by quenching, the carbon has no time to migrate but is locked within the face-centred austenite and forms martensite . Martensite is a highly strained and stressed, supersaturated form of carbon and iron and is exceedingly hard but brittle. Depending on the carbon content, the martensitic phase takes different forms. Below 0.2% carbon, it takes on
17061-556: The steel. The early modern crucible steel industry resulted from the invention of Benjamin Huntsman in the 1740s. Blister steel (made as above) was melted in a crucible or in a furnace, and cast (usually) into ingots. The modern era in steelmaking began with the introduction of Henry Bessemer 's process in 1855, the raw material for which was pig iron. His method let him produce steel in large quantities cheaply, thus mild steel came to be used for most purposes for which wrought iron
17202-555: The technology of that time, such qualities were produced by chance rather than by design. Natural wind was used where the soil containing iron was heated by the use of wood. The ancient Sinhalese managed to extract a ton of steel for every 2 tons of soil, a remarkable feat at the time. One such furnace was found in Samanalawewa and archaeologists were able to produce steel as the ancients did. Crucible steel , formed by slowly heating and cooling pure iron and carbon (typically in
17343-508: The time, the company stated its goal to be a 15 percent share of European auto-body parts. In 1998, Voest-Alpine Stahl and Vossloh AG joined to purchase 90 percent of VAE Group. The Austrian manufacturer of railroad switches , turnout systems and related products was founded in 1851. as Hugo-Hütte by Hugo Henckel von Donnersmarck and owned by Österreichisch-Alpine Montangesellschaft from 1889 until that company's 1973 merger with Voest-Alpine AG, and had been independent since 1990. During 2002,
17484-522: The upper carbon content of steel, beyond which is cast iron. When carbon moves out of solution with iron, it forms a very hard, but brittle material called cementite (Fe 3 C). When steels with exactly 0.8% carbon (known as a eutectoid steel), are cooled, the austenitic phase (FCC) of the mixture attempts to revert to the ferrite phase (BCC). The carbon no longer fits within the FCC austenite structure, resulting in an excess of carbon. One way for carbon to leave
17625-550: The use of "Ruhr" as a short form of the then more common "Ruhr District" or "Ruhr Valley": Ben Tillett, A. Creech-Jones and Samuel Warren's The Ruhr: The Report of a Deputation from the Transport and General Workers Union (London 1923). Yet "The report of a deputation from the Transport and General Workers' Union which spent a fortnight examining the problems in the Ruhr Valley", published in The Economic Review , Volume 8, 1923,
17766-463: The whole mining and steel sales of the Reichswerke. The Reichswerke announced its plans for a new steel mill in Linz before the takeover of Alpine, as an incentive for VS to extract more ore at Erzberg. Linz had a special place in Nazi system, and the steel project received full financial commitment of the state. On 13 May 1938, the ground breaking ceremony for the Hermann Göring Werke in Linz
17907-788: Was a record to a single target in the whole of World War II. More than 4,800 tons of bombs were dropped through the city centre and the south of the city. In addition to the strategic bombing of the Ruhr , in April 1945, the Allies trapped several hundred thousand Wehrmacht troops in the Ruhr Pocket . After the war, the region fell within the British occupation zone , and Level of Industry plans for Germany abolished all German munitions factories and civilian industries that could support them and severely restricted civilian industries of military potential. The Ruhr Authority , an international body to regulate
18048-556: Was able to defeat the putsch by advocating a general strike that all but shut down Berlin. The work action effectively ended the putsch, but in the Ruhr it was the instigation for an armed revolt whose aim was to replace the Weimar Republic with a soviet-style council republic . In the Ruhr Uprising , the Ruhr Red Army was able to take control of the Ruhr industrial area. The Reichswehr , with assistance from Freikorps units, put down
18189-737: Was acquired by voestalpine AG in 2008. On 9 March 2016, the World Bank Group announced the debarment of Isando -based Voestalpine VAE SA (Pty) Ltd and its affiliates for a period of 27 months. The punitive measure was applied following the failed disclosure of relevant information in the company's bid for a contract under the Multimodal Transport Project in the Democratic Republic of Congo . The debarment of Voestalpine VAE SA (Pty) Ltd and affiliates qualifies for cross-debarment by other Multilateral Development Banks under
18330-434: Was completed with the takeover of Danube shipping companies and local construction businesses. The steel mill was completed during the conflict and was generously subsidized by the state. Between 1943 and 1944, when the Ruhr was heavily bombed (see Battle of the Ruhr ), Hitler demanded a sharp increase in steel production in Austria. Göring launched a huge and unmanageable expansion campaign and spared no expense, all in vain:
18471-697: Was developed in Southern India and Sri Lanka in the 1st millennium BCE. Metal production sites in Sri Lanka employed wind furnaces driven by the monsoon winds, capable of producing high-carbon steel. Large-scale wootz steel production in India using crucibles occurred by the sixth century BC, the pioneering precursor to modern steel production and metallurgy. High-carbon steel was produced in Britain at Broxmouth Hillfort from 490–375 BC, and ultrahigh-carbon steel
18612-563: Was dismantled and sold to SSAB (then known as Norrbottens Järnverk AB) in Luleå , Sweden ; the proceeds were used to purchase coal in Poland . The supply of coal allowed VÖEST to restart its pig iron smelting operation in June 1947; the first pig iron was shipped to Sweden. Two other furnaces were earmarked for sale to Czechoslovakia ; Mark Clark objected to this deal since 1946 and it finally fell apart after
18753-452: Was exported or processed in coking ovens into coke , used in blast furnaces , producing iron and steel. In this period the name Ruhrgebiet became common. Before the coal deposits along the Ruhr were exhausted, the mining industry moved northward to the Emscher and finally to the Lippe, drilling ever deeper mines as it went. Locks built at Mülheim on the Ruhr led to the expansion of Mülheim as
18894-502: Was formerly used. The Gilchrist-Thomas process (or basic Bessemer process ) was an improvement to the Bessemer process, made by lining the converter with a basic material to remove phosphorus. Another 19th-century steelmaking process was the Siemens-Martin process , which complemented the Bessemer process. It consisted of co-melting bar iron (or steel scrap) with pig iron. These methods of steel production were rendered obsolete by
19035-453: Was handed over to economic administration by France as a protectorate in 1947 and did not politically return to Germany until January 1957, with economic reintegration occurring two years later. Parallel to the question of political control of the Ruhr, the Allies tried to decrease German industrial potential by limitations on production and dismantling of factories and steel plants, predominantly in
19176-527: Was held. Paul Pleiger was appointed chief of the Reichswerke in Linz for his services to the Nazis during the Anschluss. The synergy of steel works in Linz and ore reserves at Erzberg, vertically integrated into the Reichswerke, made it virtually independent of the steel elite of the Ruhr . The works in Linz were viewed as a hub of a future steel conglomerate spanning over the whole Central Europe. The integration
19317-463: Was not enough of it. The Bergische industry ordered more and more coal from the new coal mining area along the Ruhr . Impressive and expensive railways were constructed through the hilly Wupper region, to bring coal, and later steel, in from the Ruhr, and for outward transport of finished products. By 1850, there were almost 300 coal mines in operation in the Ruhr area, in and around the central cities of Duisburg, Essen, Bochum and Dortmund. The coal
19458-581: Was now removed. France's eastern allies (the Soviet Union , Poland , Czechoslovakia , Romania and Yugoslavia ) concluded that since the French refused to defend their own border, they certainly would not stand up for their allies in the East. Hitler could now continue eroding the alliance system that France had built since 1919. On 16 October 1936, Belgium repudiated the 1921 alliance with France and declared its absolute neutrality. In October 1937, Belgium signed
19599-438: Was produced globally, with 630,000,000 tonnes (620,000,000 long tons; 690,000,000 short tons) recycled. Modern steels are made with varying combinations of alloy metals to fulfil many purposes. Carbon steel , composed simply of iron and carbon, accounts for 90% of steel production. Low alloy steel is alloyed with other elements, usually molybdenum , manganese, chromium, or nickel, in amounts of up to 10% by weight to improve
19740-729: Was produced in the Netherlands from the 2nd-4th centuries AD. The Roman author Horace identifies steel weapons such as the falcata in the Iberian Peninsula , while Noric steel was used by the Roman military . The Chinese of the Warring States period (403–221 BC) had quench-hardened steel, while Chinese of the Han dynasty (202 BC—AD 220) created steel by melting together wrought iron with cast iron, thus producing
19881-455: Was purchased by Hugo Stinnes for the German giant Vereinigte Stahlwerke AG (VS). After the Nazi Party came to power in Germany, the Nazi leadership and the German steel barons clashed in a conflict over the rate of economic growth: the Nazis demanded rapid buildup of industrial capacity while the big business feared overproduction and preferred to keep status quo . In the first half of 1937
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