119-619: Universal Everything is a digital art practice and design studio based in Sheffield , England. The studio was founded in 2004 by Matt Pyke, who is the creative director. Pyke studied botanical and technical illustration and then graphic design, before spending eight years at the Designers Republic (1996–2004). Universal Everything have worked with several well known brands and corporations including Chanel, AOL Intel, Nike Inc., Hyundai, Samsung and Zaha Hadid, Apple, and Deutsche Bank and created
238-708: A martensitic stainless steel alloy, today known as AISI type 420. The discovery was announced two years later in a January 1915 newspaper article in The New York Times . The metal was later marketed under the "Staybrite" brand by Firth Vickers in England and was used for the new entrance canopy for the Savoy Hotel in London in 1929. Brearley applied for a US patent during 1915 only to find that Haynes had already registered one. Brearley and Haynes pooled their funding and, with
357-544: A temperate oceanic climate ( Cfb ) like the rest of the United Kingdom. The uplands of the Pennines to the west can create a cool, gloomy and wet environment, but they also provide shelter from the prevailing westerly winds, casting a " rain shadow " across the area. Between 1971 and 2000 Sheffield averaged 824.7 mm (32.47 in) of rain per year; December was the wettest month with 91.9 mm (3.62 in) and July
476-665: A 2% decline from the 1991 census. The city is part of the wider Sheffield urban area , which had a population of 640,720. In 2011 the racial composition of Sheffield's population was 84% White (81% White British , 0.5% White Irish , 0.1% Romani or Irish Traveller , 2.3% Other White ), 2.4% of mixed race (1.0% White and Black Caribbean, 0.2% White and Black African, 0.6% White and Asian, 0.6% Other Mixed), 8% Asian (1.1% Indian , 4% Pakistani , 0.6% Bangladeshi , 1.3% Chinese , 1.0% Other Asian), 3.6% Black (2.1% African, 1% Caribbean , 0.5% Other Black ), 1.5% Arab and 0.7% of other ethnic heritage. In terms of religion, 53% of
595-566: A 2008 report showed that the climate of Sheffield is warming faster than it has at any time during this period, with 1990 and 2006 being the hottest years on record. In collaboration with the Stockholm Environment Institute , Sheffield developed a carbon footprint (based on 2004–05 consumption figures) of 5,798,361 tonnes per year. This compares to the UK's total carbon footprint of 698,568,010 tonnes per year. The factors with
714-480: A Labour MP for the first time in its history. Sheffield is located at 53°22′59″N 1°27′57″W / 53.38297°N 1.4659°W / 53.38297; -1.4659 . It lies directly beside Rotherham , from which it is separated largely by the M1 motorway . Although Barnsley Metropolitan Borough also borders Sheffield to the north, the town itself is a few miles further away. The southern and western borders of
833-575: A body-centered tetragonal crystal structure, and offer a wide range of properties and are used as stainless engineering steels, stainless tool steels, and creep -resistant steels. They are magnetic, and not as corrosion-resistant as ferritic and austenitic stainless steels due to their low chromium content. They fall into four categories (with some overlap): Martensitic stainless steels can be heat treated to provide better mechanical properties. The heat treatment typically involves three steps: Replacing some carbon in martensitic stainless steels by nitrogen
952-604: A group of investors, formed the American Stainless Steel Corporation, with headquarters in Pittsburgh , Pennsylvania. Brearley initially called his new alloy "rustless steel". The alloy was sold in the US under different brand names like "Allegheny metal" and "Nirosta steel". Even within the metallurgy industry, the name remained unsettled; in 1921, one trade journal called it "unstainable steel". Brearley worked with
1071-458: A huge expansion of its traditional cutlery trade, when processes for high-quality stainless steel and crucible steel were invented based on previous discoveries elsewhere. This fuelled an almost tenfold increase in the population. Sheffield received its municipal charter in 1843, becoming the City of Sheffield in 1893. International competition in iron and steel caused a decline in these industries in
1190-511: A local cutlery manufacturer, who gave it the name "stainless steel". As late as 1932, Ford Motor Company continued calling the alloy "rustless steel" in automobile promotional materials. In 1929, before the Great Depression, over 25,000 tons of stainless steel were manufactured and sold in the US annually. Major technological advances in the 1950s and 1960s allowed the production of large tonnages at an affordable cost: Stainless steel
1309-451: A lower design criteria and corrosion resistance is required, for example in high temperatures and oxidizing environments. Martensitic , duplex and ferritic stainless steels are magnetic , while austenitic stainless steel is usually non-magnetic. Ferritic steel owes its magnetism to its body-centered cubic crystal structure , in which iron atoms are arranged in cubes (with one iron atom at each corner) and an additional iron atom in
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#17330848286641428-463: A move to online shopping, which had increased because of the COVID-19 pandemic . John Lewis received £3 million of public funding from Sheffield City Council in 2020 to keep the local store open. The local Debenhams branches are expected to re-open after the lifting of the 2021 COVID-19 lockdown restrictions, but only to clear existing stock, after which it is expected the stores will close. With
1547-469: A protective oxide surface film, such as aluminum and titanium, are also susceptible. Under high contact-force sliding, this oxide can be deformed, broken, and removed from parts of the component, exposing the bare reactive metal. When the two surfaces are of the same material, these exposed surfaces can easily fuse. Separation of the two surfaces can result in surface tearing and even complete seizure of metal components or fasteners. Galling can be mitigated by
1666-542: A public space to link these two areas, the Millennium Square , was opened in May 2006. Additional developments included the remodelling of Sheaf Square , in front of the refurbished railway station: the square contains "The Cutting Edge", a sculpture designed by Si Applied Ltd and made from Sheffield steel. Recent development known as the 'Heart of the City' includes the restoration of the listed Leah's Yard complex. Sheffield
1785-406: A useful interchange table. Although stainless steel does rust, this only affects the outer few layers of atoms, its chromium content shielding deeper layers from oxidation. The addition of nitrogen also improves resistance to pitting corrosion and increases mechanical strength. Thus, there are numerous grades of stainless steel with varying chromium and molybdenum contents to suit the environment
1904-469: Is Labour 36, Liberal Democrats 27, the Green Party 14, Conservative 0 and Independent 7. The city also has a Lord Mayor ; though now simply a ceremonial position, in the past the office carried considerable authority, with executive powers over the finances and affairs of the city council. The position of Lord Mayor is elected on an annual basis. For much of its history the council was controlled by
2023-644: Is a corruption of shed or sheth , which refers to a divide or separation . The second half of the name Sheffield refers to a field, or forest clearing. Combining the two words, it is believed that the name refers to an Anglo-Saxon settlement in a clearing by the confluence of the River Don and River Sheaf. [REDACTED] Kingdom of England c. 12th century – 1707 [REDACTED] Kingdom of Great Britain 1707–1801 [REDACTED] United Kingdom of Great Britain and Ireland 1801–1922 [REDACTED] United Kingdom 1922–present The area now occupied by
2142-406: Is a recent development. The limited solubility of nitrogen is increased by the pressure electroslag refining (PESR) process, in which melting is carried out under high nitrogen pressure. Steel containing up to 0.4% nitrogen has been achieved, leading to higher hardness and strength and higher corrosion resistance. As PESR is expensive, lower but significant nitrogen contents have been achieved using
2261-629: Is also related to other efforts to rejuvenate the Fargate area, such as a new mixed-use events and coworking hub at 20–26 Fargate, also overseen by Sheffield City Council. Stainless steel Stainless steel , also known as inox , corrosion-resistant steel ( CRES ), and rustless steel , is an alloy of iron that is resistant to rusting and corrosion . It contains iron with chromium and other elements such as molybdenum , carbon , nickel and nitrogen depending on its specific use and cost. Stainless steel's resistance to corrosion results from
2380-532: Is an extension of the heating- quenching - tempering cycle, where the final temperature of the material before full-load use is taken down to a cryogenic temperature range. This can remove residual stresses and improve wear resistance. Austenitic stainless steel sub-groups, 200 series and 300 series: Ferritic stainless steels possess a ferrite microstructure like carbon steel, which is a body-centered cubic crystal structure, and contain between 10.5% and 27% chromium with very little or no nickel. This microstructure
2499-426: Is bent or cut, magnetism occurs along the edge of the stainless steel because the crystal structure rearranges itself. Galling , sometimes called cold welding, is a form of severe adhesive wear, which can occur when two metal surfaces are in relative motion to each other and under heavy pressure. Austenitic stainless steel fasteners are particularly susceptible to thread galling, though other alloys that self-generate
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#17330848286642618-510: Is classified into five main families that are primarily differentiated by their crystalline structure : Austenitic stainless steel is the largest family of stainless steels, making up about two-thirds of all stainless steel production. They possess an austenitic microstructure, which is a face-centered cubic crystal structure. This microstructure is achieved by alloying steel with sufficient nickel, manganese, or nitrogen to maintain an austenitic microstructure at all temperatures, ranging from
2737-554: Is greater than that of the broader region of Yorkshire and the Humber. Sheffield had a population of 556,500 at the 2021 census, making it the second-largest city in the Yorkshire and the Humber region. The Sheffield Built-up Area , of which the Sheffield sub-division is the largest part, had a population of 685,369 also including the town of Rotherham . The district borough , governed from
2856-519: Is green space and a third of the city lies within the Peak District national park and is the fifth-largest city in England. There are more than 250 parks, woodlands and gardens in the city, which is estimated to contain around 4.5 million trees. Sheffield played a crucial role in the Industrial Revolution , developing many significant technologies. In the 19th century, the city saw
2975-409: Is near that of ordinary steel, and much higher than the melting points of aluminium or copper. As with most alloys, the melting point of stainless steel is expressed in the form of a range of temperatures, and not a single temperature. This temperature range goes from 1,400 to 1,530 °C (2,550 to 2,790 °F; 1,670 to 1,800 K; 3,010 to 3,250 °R) depending on the specific consistency of
3094-1421: Is one of the most-produced industrial chemicals. At room temperature, type 304 stainless steel is only resistant to 3% acid, while type 316 is resistant to 3% acid up to 50 °C (120 °F) and 20% acid at room temperature. Thus type 304 SS is rarely used in contact with sulfuric acid. Type 904L and Alloy 20 are resistant to sulfuric acid at even higher concentrations above room temperature. Concentrated sulfuric acid possesses oxidizing characteristics like nitric acid, and thus silicon-bearing stainless steels are also useful. Hydrochloric acid damages any kind of stainless steel and should be avoided. All types of stainless steel resist attack from phosphoric acid and nitric acid at room temperature. At high concentrations and elevated temperatures, attack will occur, and higher-alloy stainless steels are required. In general, organic acids are less corrosive than mineral acids such as hydrochloric and sulfuric acid. Type 304 and type 316 stainless steels are unaffected by weak bases such as ammonium hydroxide , even in high concentrations and at high temperatures. The same grades exposed to stronger bases such as sodium hydroxide at high concentrations and high temperatures will likely experience some etching and cracking. Increasing chromium and nickel contents provide increased resistance. All grades resist damage from aldehydes and amines , though in
3213-655: Is particularly well known, is from 1297 when a tax return for 'Robert the Cutler' was submitted. A key reason for Sheffield's success in the production of cutlery lies in its geographic makeup. The abundance of streams in the area provided water power and the geological formations in the Hope Valley , in particular, provided sufficient grit stones for grinding wheels. In the 17th century, the Company of Cutlers in Hallamshire , which oversaw
3332-402: Is porous and fragile. In addition, as iron oxide occupies a larger volume than the original steel, this layer expands and tends to flake and fall away, exposing the underlying steel to further attack. In comparison, stainless steels contain sufficient chromium to undergo passivation , spontaneously forming a microscopically thin inert surface film of chromium oxide by reaction with the oxygen in
3451-498: Is present at all temperatures due to the chromium addition, so they are not capable of being hardened by heat treatment. They cannot be strengthened by cold work to the same degree as austenitic stainless steels. They are magnetic. Additions of niobium (Nb), titanium (Ti), and zirconium (Zr) to type 430 allow good weldability. Due to the near-absence of nickel, they are less expensive than austenitic steels and are present in many products, which include: Martensitic stainless steels have
3570-452: Is superior to both aluminium and copper, and comparable to glass. Its cleanability, strength, and corrosion resistance have prompted the use of stainless steel in pharmaceutical and food processing plants. Different types of stainless steel are labeled with an AISI three-digit number. The ISO 15510 standard lists the chemical compositions of stainless steels of the specifications in existing ISO, ASTM , EN , JIS , and GB standards in
3689-528: Is the sole remaining independent steel works in the world and dominates the north-east of Sheffield around the Lower Don Valley . The firm has a global reputation for producing the largest and most complex steel forgings and castings and is certified to produce critical nuclear components, with recent projects including the Royal Navy 's Astute -class submarines. The firm also has the capacity for pouring
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3808-805: The Advanced Manufacturing Park , situated just over the boundary in the borough of Rotherham, by Sheffield's universities and other independent research organisations. Organisations located on the AMP include the Advanced Manufacturing Research Centre (AMRC, a research partnership between the Boeing Company and the University of Sheffield ), Castings Technology International (CTI), The Welding Institute (TWI), Rolls-Royce plc and McLaren Automotive . Forgemasters , founded in 1805,
3927-651: The City Lofts Tower and accompanying St Paul's Place , Velocity Living and the Moor redevelopment, the forthcoming NRQ and the Winter Gardens , Peace Gardens , Millennium Galleries and many projects completed under the Sheffield One redevelopment agency. The Sheffield economy grew from £5.6 billion in 1997 (1997 GVA ) to £9.2 billion in 2007 (2007 GVA). The "UK Cities Monitor 2008" placed Sheffield among
4046-562: The Essen firm Friedrich Krupp Germaniawerft built the 366-ton sailing yacht Germania featuring a chrome-nickel steel hull, in Germany. In 1911, Philip Monnartz reported on the relationship between chromium content and corrosion resistance. On 17 October 1912, Krupp engineers Benno Strauss and Eduard Maurer patented as Nirosta the austenitic stainless steel known today as 18/8 or AISI type 304. Similar developments were taking place in
4165-647: The House of Wessex . After the Norman conquest of England , Sheffield Castle was built to protect the local settlements, and a small town developed that is the nucleus of the modern city. By 1296, a market had been established at what is now known as Castle Square , and Sheffield subsequently grew into a small market town . In the 14th century, Sheffield was already noted for the production of knives , as mentioned in Geoffrey Chaucer 's The Canterbury Tales , and by
4284-560: The Park Hill flats . Large parts of the city centre were also cleared to make way for a new system of roads. In February 1962, the city was devastated by the Great Sheffield Gale ; winds of up to 97 mph (156 km/h) killed four people and damaged 150,000 houses, more than two-thirds of the city's housing stock at the time. Increased automation and competition from abroad resulted in the closure of many steel mills . The 1980s saw
4403-468: The Royal Navy . While iron and steel have long been the main industries of Sheffield, coal mining has also been a major industry, particularly in the outlying areas, and the Palace of Westminster in London was built using limestone from quarries in the nearby village of Anston . Sheffield has a large public sector workforce, numbering 77,500 workers. During the period 1995–2008 (a period of growth for
4522-801: The Sheffield Arena , Don Valley Stadium and the Ponds Forge complex. Sheffield is changing rapidly as new projects regenerate some of the more run-down parts of the city. One such, the Heart of the City Project , has initiated a number of public works in the city centre: the Peace Gardens were renovated in 1998, the Millennium Galleries opened in April 2001, the Winter Gardens were opened in May 2003, and
4641-512: The Sheffield Blitz . The city was partially protected by barrage balloons managed from RAF Norton . More than 660 people died and many buildings were destroyed or left badly damaged, including the Marples Hotel, which was hit directly by a 500-pound bomb, killing over 70 people. In the 1950s and 1960s, many of the city's slums were demolished, and replaced with housing schemes such as
4760-710: The West Riding of Yorkshire and some of its southern suburbs were transferred from Derbyshire to the city council. It is the largest settlement in South Yorkshire. The city is in the eastern foothills of the Pennines and the valleys of the River Don with its four tributaries: the Loxley , the Porter Brook , the Rivelin and the Sheaf . Sixty-one per cent of Sheffield's entire area
4879-787: The Wortley Rural District . This area includes a significant part of the countryside surrounding the main urban region. Roughly a third of Sheffield lies in the Peak District National Park . No other English city had parts of a national park within its boundary, until the creation in March 2010 of the South Downs National Park , part of which lies within Brighton and Hove . According to the Köppen classification , Sheffield has
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4998-638: The cryogenic region to the melting point. Thus, austenitic stainless steels are not hardenable by heat treatment since they possess the same microstructure at all temperatures. However, "forming temperature is an essential factor for metastable austenitic stainless steel (M-ASS) products to accommodate microstructures and cryogenic mechanical performance. ... Metastable austenitic stainless steels (M-ASSs) are widely used in manufacturing cryogenic pressure vessels (CPVs), owing to their high cryogenic toughness, ductility, strength, corrosion-resistance, and economy." Cryogenic cold-forming of austenitic stainless steel
5117-528: The water industry . Precipitation hardening stainless steels have corrosion resistance comparable to austenitic varieties, but can be precipitation hardened to even higher strengths than other martensitic grades. There are three types of precipitation hardening stainless steels: Solution treatment at about 1,040 °C (1,900 °F) followed by quenching results in a relatively ductile martensitic structure. Subsequent aging treatment at 475 °C (887 °F) precipitates Nb and Cu-rich phases that increase
5236-719: The 10.5%, or more, chromium content which forms a passive film that can protect the material and self-heal in the presence of oxygen. The alloy's properties, such as luster and resistance to corrosion, are useful in many applications. Stainless steel can be rolled into sheets , plates, bars, wire, and tubing. These can be used in cookware , cutlery , surgical instruments , major appliances , vehicles, construction material in large buildings, industrial equipment (e.g., in paper mills , chemical plants , water treatment ), and storage tanks and tankers for chemicals and food products. Some grades are also suitable for forging and casting . The biological cleanability of stainless steel
5355-536: The 1840s, both Britain's Sheffield steelmakers and then Krupp of Germany were producing chromium steel with the latter employing it for cannons in the 1850s. In 1861, Robert Forester Mushet took out a patent on chromium steel in Britain. These events led to the first American production of chromium-containing steel by J. Baur of the Chrome Steel Works of Brooklyn for the construction of bridges. A US patent for
5474-555: The 18th century, and was dubbed " Steel City ". Many innovations in these fields have been made in Sheffield, for example Benjamin Huntsman discovered the crucible technique in the 1740s at his workshop in Handsworth . This process was rendered obsolete in 1856 by Henry Bessemer 's invention of the Bessemer converter . Thomas Boulsover invented Sheffield plate (silver-plated copper) in
5593-641: The 1970s and 1980s, coinciding with the collapse of coal mining in the area. The Yorkshire ridings became counties in their own right in 1889; the West Riding of Yorkshire county was disbanded in 1974. The city then became part of the county of South Yorkshire ; this has been made up of separately governed unitary authorities since 1986. The 21st century has seen extensive redevelopment in Sheffield, consistent with other British cities. Sheffield's gross value added (GVA) has increased by 60% since 1997, standing at £11.3 billion in 2015. The economy has experienced steady growth, averaging around 5% annually, which
5712-549: The 19th century didn't pay attention to the amount of carbon in the alloyed steels they were testing until in 1898 Adolphe Carnot and E. Goutal noted that chromium steels better resist to oxidation with acids the less carbon they contain. Also in the late 1890s, German chemist Hans Goldschmidt developed an aluminothermic ( thermite ) process for producing carbon-free chromium. Between 1904 and 1911, several researchers, particularly Leon Guillet of France, prepared alloys that would be considered stainless steel today. In 1908,
5831-449: The 52.0 sq mi (134.7 km ) of national park and 4.20 sq mi (10.9 km ) of water this means that 61% of the city is greenspace . Despite this, about 64% of Sheffield householders live further than 300 m (328 yd) from their nearest greenspace, although access is better in less affluent neighbourhoods across the city. Sheffield also has a very wide variety of habitat , comparing favourably with any city in
5950-484: The City of Sheffield is 548 m (1,798 ft) near High Stones and Margery Hill . The city's lowest point is just 29 m (95 ft) above sea level near Blackburn Meadows . However, 79% of the housing in the city is between 100 and 200 m (330 and 660 ft) above sea level and the highest residential street is Redmires Lane at 302 m (991 ft). This variation of altitudes across Sheffield has led to frequent claims, particularly among locals, that
6069-614: The City of Sheffield is believed to have been inhabited since at least the late Upper Paleolithic , about 12,800 years ago. The earliest evidence of human occupation in the Sheffield area was found at Creswell Crags to the east of the city. In the Iron Age the area became the southernmost territory of the Pennine tribe called the Brigantes . It is this tribe who are thought to have constructed several hillforts in and around Sheffield. Following
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#17330848286646188-599: The Environment Agency to clear local river channels since the 2007 event. In 2014 Sheffield Council's cabinet approved plans to further reduce the possibility of flooding by adopting plans to increase water catchment on tributaries of the River Don. Another flood hit the city in 2019 , resulting in shoppers being contained in Meadowhall Shopping Centre. Between 2014 and 2018, there were disputes between
6307-631: The Labour Party, and was noted for its leftist sympathies; during the 1980s, when Sheffield City Council was led by David Blunkett , the area gained the epithet the " Socialist Republic of South Yorkshire ". However, the Liberal Democrats controlled the Council between 1999 and 2001 and took control again from 2008 to 2011. The majority of council-owned facilities are operated by independent charitable trusts. Sheffield International Venues runs many of
6426-401: The Sheffield district of Hallam was the highest ranking area outside London for overall wealth, the proportion of people earning over £60,000 a year standing at almost 12%. A survey by Knight Frank revealed that Sheffield was the fastest-growing city outside London for office and residential space and rents during the second half of 2004. This can be seen in a surge of redevelopments, including
6545-474: The South Yorkshire authorities, as well as Bolsover District , Borough of Chesterfield , Derbyshire Dales , North East Derbyshire and Bassetlaw District . In 2014, the Sheffield City Region Combined authority was formed by the South Yorkshire local authorities with the other councils as non-constituent members and the partnership integrated with the authority structure. In September 2020,
6664-477: The United Kingdom: urban, parkland and woodland, agricultural and arable land, moors, meadows and freshwater-based habitats. There are six areas within the city that are designated as sites of special scientific interest . The present city boundaries were set in 1974 (with slight modification in 1994), when the former county borough of Sheffield merged with Stocksbridge Urban District and two parishes from
6783-597: The United States, where Christian Dantsizen of General Electric and Frederick Becket (1875–1942) at Union Carbide were industrializing ferritic stainless steel. In 1912, Elwood Haynes applied for a US patent on a martensitic stainless steel alloy, which was not granted until 1919. While seeking a corrosion-resistant alloy for gun barrels in 1913, Harry Brearley of the Brown-Firth research laboratory in Sheffield, England, discovered and subsequently industrialized
6902-662: The aforementioned government departments. Sheffield City Council , which is also a major public sector employer in the city, employs over 8,000 people, spread across four different sections (known as portfolios). Sheffield City Council is also the Local Education Authority (LEA) and as such manages all states schools and their associated staff. As part of its mandate to provide public services, Sheffield City Council maintains contracts with three private contractors— Amey , Veolia and Capita (contract ending in 2020). Together, these contractors provide additional employment in
7021-441: The air and even the small amount of dissolved oxygen in the water. This passive film prevents further corrosion by blocking oxygen diffusion to the steel surface and thus prevents corrosion from spreading into the bulk of the metal. This film is self-repairing, even when scratched or temporarily disturbed by conditions that exceed the inherent corrosion resistance of that grade. The resistance of this film to corrosion depends upon
7140-587: The alloy in question. Like steel , stainless steels are relatively poor conductors of electricity, with significantly lower electrical conductivities than copper. In particular, the non-electrical contact resistance (ECR) of stainless steel arises as a result of the dense protective oxide layer and limits its functionality in applications as electrical connectors. Copper alloys and nickel-coated connectors tend to exhibit lower ECR values and are preferred materials for such applications. Nevertheless, stainless steel connectors are employed in situations where ECR poses
7259-610: The alloy must endure. Corrosion resistance can be increased further by the following means: The most common type of stainless steel, 304, has a tensile yield strength around 210 MPa (30,000 psi) in the annealed condition. It can be strengthened by cold working to a strength of 1,050 MPa (153,000 psi) in the full-hard condition. The strongest commonly available stainless steels are precipitation hardening alloys such as 17-4 PH and Custom 465. These can be heat treated to have tensile yield strengths up to 1,730 MPa (251,000 psi). Melting point of stainless steel
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#17330848286647378-699: The alloy. The invention of stainless steel followed a series of scientific developments, starting in 1798 when chromium was first shown to the French Academy by Louis Vauquelin . In the early 1800s, British scientists James Stoddart, Michael Faraday , and Robert Mallet observed the resistance of chromium-iron alloys ("chromium steels") to oxidizing agents . Robert Bunsen discovered chromium's resistance to strong acids. The corrosion resistance of iron-chromium alloys may have been first recognized in 1821 by Pierre Berthier , who noted their resistance against attack by some acids and suggested their use in cutlery. In
7497-452: The authority changed to its current name. The city returns five members of parliament to the House of Commons , with a sixth, the Member of Parliament for Penistone and Stocksbridge representing parts of Sheffield and Barnsley. The former Deputy Prime Minister Nick Clegg was an MP for Sheffield, representing Sheffield Hallam from 2005 until he was unseated 2017 , when the seat returned
7616-400: The booming cutlery industry in the area and remains to this day, was established and focused on markets outside the Sheffield area, leading to the gradual establishment of Sheffield as a respected producer of cutlery. this gradually developed from a national reputation into an international one. Playing a crucial role in the Industrial Revolution , the city became an industrial powerhouse in
7735-580: The center. This central iron atom is responsible for ferritic steel's magnetic properties. This arrangement also limits the amount of carbon the steel can absorb to around 0.025%. Grades with low coercive field have been developed for electro-valves used in household appliances and for injection systems in internal combustion engines. Some applications require non-magnetic materials, such as magnetic resonance imaging . Austenitic stainless steels, which are usually non-magnetic , can be made slightly magnetic through work hardening . Sometimes, if austenitic steel
7854-544: The chemical composition of the stainless steel, chiefly the chromium content. It is customary to distinguish between four forms of corrosion: uniform, localized (pitting), galvanic, and SCC (stress corrosion cracking). Any of these forms of corrosion can occur when the grade of stainless steel is not suited for the working environment. The designation "CRES" refers to corrosion-resistant (stainless) steel. Uniform corrosion takes place in very aggressive environments, typically where chemicals are produced or heavily used, such as in
7973-744: The city and many others in the UK), the number of jobs in the city increased by 22% and 50% of these were in the public sector. Major public sector employers include the National Health Service , The University of Sheffield, Sheffield Hallam University , and numerous government departments and agencies including the Home Office (Visas & Immigration), Department for Education & Department for Business, Innovation & Skills . Recently developed offices in St Paul's Place and Riverside Exchange play host to
8092-415: The city are shared with Derbyshire ; in the first half of the 20th century Sheffield extended its borders south into Derbyshire, annexing a number of villages, including Totley , Dore and the area now known as Mosborough Townships. Sheffield is a geographically diverse city. It nestles in the eastern foothills of the Pennines , between the main upland range and Peak District National Park to
8211-409: The city as the cutlery and steel industries flourished. The population continued to grow until the mid-20th century, at which point, due to industrial decline, the population began to contract. However, by the early 21st century, the population had begun to grow once again. The population of Sheffield peaked in 1951 at 577,050, and has since declined steadily. However, the mid-2007 population estimate
8330-459: The city council and residents over the fate of the city's 36,000 highway trees. Around 4,000 highway trees have since been felled as part of the 'Streets Ahead' Private Finance Initiative (PFI) contract signed in 2012 by the city council, Amey plc and the Department for Transport to maintain the city streets. The tree fellings have resulted in many arrests of residents and other protesters across
8449-543: The city even though most felled trees in the city have been replanted, including those historically felled and not previously replanted. The protests eventually stopped in 2018 after the council paused the tree felling programme as part of a new approach developed by the council for the maintenance of street trees in the city. In May 2022, Sheffield was named a " Tree City of the World " in recognition of its work to sustainably manage and maintain urban forests and trees. This honour
8568-751: The city was built on Seven Hills. As this claim is disputed, it likely originated as a joke referencing the Seven Hills of Rome . Estimated to contain around 4.5 million trees, Sheffield has more trees per person than any other city in Europe and is considered to be one of the greenest cities in England and the UK, which was further reinforced when it won the 2005 Entente Florale competition. With more than 250 parks, woodlands and gardens, it has over 170 woodlands (covering 10.91 sq mi or 28.3 km ), 78 public parks (covering 7.07 sq mi or 18.3 km ) and 10 public gardens. Added to
8687-547: The city's sporting and leisure facilities, including Sheffield Arena and the English Institute of Sport, Sheffield . Museums Sheffield and the Sheffield Industrial Museums Trust take care of galleries and museums owned by the council. The city of Sheffield is part of the wider South Yorkshire Mayoral Combined Authority , headed by mayor Oliver Coppard since 2022. The combined authority covers
8806-492: The city, had a population of 566,242 at the mid-2019 estimate, making it the 7th -most-populous district in England. It is one of eleven British cities that make up the Core Cities Group . In 2011, the unparished area had a population of 490,070. The city has a long sporting heritage and is home both to the world's oldest football club, Sheffield F.C. , and the world's oldest football ground, Sandygate . Matches between
8925-470: The city. Sheffield is a major retail centre, and is home to many high street and department stores as well as designer boutiques. The main shopping areas in the city centre are on The Moor precinct, Fargate , Orchard Square and the Devonshire Quarter . Department stores in the city centre include Marks and Spencer and Atkinsons . Sheffield's main market was once Castle Market , built above
9044-412: The city; instead it is divided into 28 electoral wards , with each ward generally covering 4–6 areas. These electoral wards are grouped into six parliamentary constituencies . Sheffield is largely unparished , but Bradfield and Ecclesfield have parish councils, and Stocksbridge has a town council. The United Kingdom Census 2001 reported a resident population for Sheffield of 513,234,
9163-525: The decline in high street shopping around the UK, efforts have been made to rejuvenate Sheffield City Centre and improve the retail and leisure offering. Major developments include Leopold Square , The Moor , St Paul's Place (a mixed use development) and the Heart of the City I & II projects. In March 2022 Sheffield City Council announced that a new leisure hub would be constructed at the southern end of Fargate. The £300,000 hub will feature cafes, shops and large-screen TVs for sports events. The development
9282-603: The departure of the Romans, the Sheffield area may have been the southern part of the Brittonic kingdom of Elmet , with the rivers Sheaf and Don forming part of the boundary between this kingdom and the kingdom of Mercia . Gradually, Anglian settlers pushed west from the kingdom of Deira . A Britonnic presence within the Sheffield area is evidenced by two settlements called Wales and Waleswood close to Sheffield. The settlements that grew and merged to form Sheffield, however, date from
9401-424: The designation. A subsidiary aim of the green belt is to encourage recreation and leisure interests, with many rural landscape features and facilities included. Sheffield is made up of many suburbs and neighbourhoods, many of which developed from villages or hamlets that were absorbed into Sheffield as the city grew. These historical areas are largely ignored by the modern administrative and political divisions of
9520-531: The driest with 51.0 mm (2.01 in). July was also the hottest month, with an average maximum temperature of 20.8 °C (69.4 °F). The highest temperature ever recorded in the city of Sheffield was 39.4 °C (102.9 °F), on 19 July 2022. The average minimum temperature in January and February was 1.6 °C (34.9 °F), though the lowest temperatures recorded in these months can be between −10 and −15 °C (14 and 5 °F), although since 1960,
9639-489: The early 1600s it had become the main centre of cutlery manufacture in England outside London, overseen by the Company of Cutlers in Hallamshire . From 1570 to 1584, Mary, Queen of Scots , was imprisoned in Sheffield Castle and Sheffield Manor . During the 1740s, a form of the crucible steel process was discovered that allowed the manufacture of a better quality of steel than had previously been possible. In about
9758-407: The early 18th century. Stainless steel was invented by Harry Brearley in 1912, bringing affordable cutlery to the masses. The work of F. B. Pickering and T. Gladman throughout the 1960s, 1970s and 1980s was fundamental to the development of modern high-strength low-alloy steels. Further innovations continue, with new advanced manufacturing technologies and techniques being developed on
9877-574: The former 1974–1986 South Yorkshire County Council area which functions either went to local or regional authorities. In 2004, as part of the Moving Forward: The Northern Way document, city regions were created in a collaboration with the three northern regional development agencies . These became independent Local enterprise partnerships in 2011. The area's partnership retains the Sheffield City Region name, covering
9996-462: The greatest impact are housing (34%), transport (25%), consumer (11%), private services (9%), public services (8%), food (8%) and capital investment (5%). Sheffield City Council has signed up to the 10:10 campaign. Sheffield is within a green belt region that extends into the wider surrounding counties, and is in place to reduce urban sprawl , prevent the towns and areas in the Sheffield built-up area conurbation from further convergence, protect
10115-418: The identity of outlying communities, encourage brownfield reuse, and preserve nearby countryside. This is achieved by restricting inappropriate development within the designated areas, and imposing stricter conditions on permitted building. The main urban area and larger villages of the borough are exempt from the green belt area, but surrounding smaller villages, hamlets and rural areas are 'washed over' with
10234-533: The internationally touring exhibition curated by the Barbican . Artworks by Universal Everything have been held in the collections at Borusan Contemporary since 2014. Universal Everything regularly publishes exclusive artworks on the digital platform Sedition . In June 2014, Universal Everything's work, Walking City, was awarded the PRIX Ars Electronica "Golden Nica for Computer Animation/VFX". In 2019,
10353-494: The largest single ingot (570 tonnes) in Europe and is currently in the process of expanding its capabilities. In July 2021 Forgemasters was bought outright by the UK Ministry of Defence for £2.56 million, with the intention of investing a further £400 million over the next decade. The decision was based on the important role Forgemasters plays in the construction of the UK nuclear submarine fleet as well other vessels for
10472-502: The most widely used. Many grading systems are in use, including US SAE steel grades . The Unified Numbering System for Metals and Alloys (UNS) was developed by the ASTM in 1970. Europe has adopted EN 10088 . Unlike carbon steel , stainless steels do not suffer uniform corrosion when exposed to wet environments. Unprotected carbon steel rusts readily when exposed to a combination of air and moisture. The resulting iron oxide surface layer
10591-525: The moving image identity for the London Olympic Games 2012 In April 2011, the studio created Super-Computer-Romantics, their first major solo exhibition, for the launch of the new digital art museum La Gaîté Lyrique in Paris. In February 2014, Universal Everything released Polyfauna, an interactive music app developed in collaboration with Radiohead and the artist Stanley Donwood . A monograph about
10710-491: The outskirts of the town. The collapse of the dam wall of one of these reservoirs in 1864 resulted in the Great Sheffield Flood , which killed 270 people and devastated large parts of the town. The growing population led to the construction of many back-to-back dwellings that, along with severe pollution from the factories, inspired George Orwell in 1937 to write: "Sheffield, I suppose, could justly claim to be called
10829-474: The population are Christian, 6% are Muslim, 0.6% are Hindu, 0.4% are Buddhist, 0.2% are Sikh, 0.1% are Jewish, 0.4% belong to another religion, 31% have no religion and 7% did not state their religion. The largest quinary group is 20- to 24-year-olds (9%) because of the large university student population. The Industrial Revolution served as a catalyst for considerable population growth and demographic change in Sheffield. Large numbers of people were driven to
10948-414: The product was issued in 1869. This was followed with recognition of the corrosion resistance of chromium alloys by Englishmen John T. Woods and John Clark, who noted ranges of chromium from 5–30%, with added tungsten and "medium carbon". They pursued the commercial value of the innovation via a British patent for "Weather-Resistant Alloys". Scientists researching steel corrosion in the second half of
11067-429: The pulp and paper industries. The entire surface of the steel is attacked, and the corrosion is expressed as corrosion rate in mm/year (usually less than 0.1 mm/year is acceptable for such cases). Corrosion tables provide guidelines. This is typically the case when stainless steels are exposed to acidic or basic solutions. Whether stainless steel corrodes depends on the kind and concentration of acid or base and
11186-402: The remains of the castle. This has since been demolished. Sheffield Moor Market opened in 2013 and became the main destination for fresh produce. The market has 196 stalls and includes local and organic produce, as well as international fusion cuisine such as Russian, Jamaican and Thai. In March 2021 it was announced that the Sheffield branch of John Lewis would close due to falling sales and
11305-475: The same period, a technique was developed for fusing a thin sheet of silver onto a copper ingot to produce silver plating, which became widely known as Sheffield plate . These innovations spurred Sheffield's growth as an industrial town, but the loss of some important export markets led to a recession in the late 18th and early 19th centuries. The resulting poor conditions culminated in a cholera epidemic that killed 402 people in 1832. The population of
11424-424: The second half of the first millennium, and are of Anglo-Saxon and Danish origin. In Anglo-Saxon times, the Sheffield area straddled the border between the kingdoms of Mercia and Northumbria . The Anglo-Saxon Chronicle reports that Eanred of Northumbria submitted to Egbert of Wessex at the hamlet of Dore (now a suburb of Sheffield) in 829, a key event in the unification of the kingdom of England under
11543-574: The solution temperature. Uniform corrosion is typically easy to avoid because of extensive published corrosion data or easily performed laboratory corrosion testing. Acidic solutions can be put into two general categories: reducing acids, such as hydrochloric acid and dilute sulfuric acid , and oxidizing acids , such as nitric acid and concentrated sulfuric acid. Increasing chromium and molybdenum content provides increased resistance to reducing acids while increasing chromium and silicon content provides increased resistance to oxidizing acids. Sulfuric acid
11662-949: The standard AOD process. Duplex stainless steels have a mixed microstructure of austenite and ferrite, the ideal ratio being a 50:50 mix, though commercial alloys may have ratios of 40:60. They are characterized by higher chromium (19–32%) and molybdenum (up to 5%) and lower nickel contents than austenitic stainless steels. Duplex stainless steels have roughly twice the yield strength of austenitic stainless steel. Their mixed microstructure provides improved resistance to chloride stress corrosion cracking in comparison to austenitic stainless steel types 304 and 316. Duplex grades are usually divided into three sub-groups based on their corrosion resistance: lean duplex, standard duplex, and super duplex. The properties of duplex stainless steels are achieved with an overall lower alloy content than similar-performing super-austenitic grades, making their use cost-effective for many applications. The pulp and paper industry
11781-402: The street-trees dispute, and we wish to reiterate our previous apologies for our failings". Sheffield is governed at the local level by Sheffield City Council and is led by Councillor Tom Hunt (Assumed office 16 May 2023). It consists of 84 councillors elected to represent 28 wards : three councillors per ward. Following the 2024 local elections , the distribution of council seats
11900-536: The strength up to above 1,000 MPa (150,000 psi) yield strength. This outstanding strength level is used in high-tech applications such as aerospace (usually after remelting to eliminate non-metallic inclusions, which increases fatigue life). Another major advantage of this steel is that aging, unlike tempering treatments, is carried out at a temperature that can be applied to (nearly) finished parts without distortion and discoloration. Typical heat treatment involves solution treatment and quenching . At this point,
12019-695: The structure remains austenitic. Martensitic transformation is then obtained either by a cryogenic treatment at −75 °C (−103 °F) or by severe cold work (over 70% deformation, usually by cold rolling or wire drawing). Aging at 510 °C (950 °F) — which precipitates the Ni 3 Al intermetallic phase—is carried out as above on nearly finished parts. Yield stress levels above 1400 MPa are then reached. The structure remains austenitic at all temperatures. Typical heat treatment involves solution treatment and quenching, followed by aging at 715 °C (1,319 °F). Aging forms Ni 3 Ti precipitates and increases
12138-567: The studio's VR artwork Emergence premiered at Sundance Film Festival . Sheffield Sheffield is a city in South Yorkshire , England, situated 29 miles (47 km) south of Leeds and 32 miles (51 km) east of Manchester . Its name derives from the River Sheaf which runs through it. The city serves as the administrative centre of the City of Sheffield . It is historically part of
12257-821: The studio's work will be published in 2019 by Unit Editions . The studio utilises modern technologies such as 3D printing, touch screens, motion capture , large format video displays and complex sound design to create large scale experiential works. Its work often incorporates and references architecture, modernism , synesthesia , landscapes, anthropomorphism , human movement, and figurative forms. Universal Everything's artworks have been shown globally as part of group shows and solo exhibitions, including at Museum of Modern Art (New York), V&A Museum (London), Central Academy of Fine Arts (Beijing), Garage Centre for Contemporary Culture (Moscow), La Gaîté Lyrique (Paris), Vitra Design Museum (Germany), MAAT (Lisbon), Borusan Contemporary (Istanbul), and as part of Digital Revolution
12376-541: The temperature at −8.7 °C (16.3 °F), recorded on 20 December, and states that to be the lowest December temperature since 1981.) The coldest temperature ever recorded in the city of Sheffield at Weston Park , since records began in 1882, is −14.6 °C (5.7 °F), registered in February 1895. The lowest daytime maximum temperature in the city since records began is −5.6 °C (21.9 °F), also recorded in February 1895. More recently, −4.4 °C (24.1 °F)
12495-498: The temperature has never fallen below −9.2 °C (15.4 °F), suggesting that urbanisation around the Weston Park site during the second half of the 20th century may prevent temperatures below −10 °C (14 °F) occurring. The coldest temperature to be recorded was −8.2 °C (17.2 °F) in 2010. (Note: The official Weston Park Weather Station statistics, which can also be viewed at Sheffield Central Library , has
12614-469: The top ten "best cities to locate a business today", the city occupying third and fourth places, respectively, for best office location and best new call centre location. The same report places Sheffield in third place regarding "greenest reputation" and second in terms of the availability of financial incentives. Sheffield has an international reputation for metallurgy and steel-making. The earliest official record of cutlery production, for which Sheffield
12733-425: The town grew rapidly throughout the 19th century; increasing from 60,095 in 1801 to 451,195 by 1901. The Sheffield and Rotherham railway was constructed in 1838, connecting the two towns. The town was incorporated as a borough in 1842, and was granted city status by letters patent in 1893. The influx of people also led to demand for better water supplies, and a number of new reservoirs were constructed on
12852-632: The two professional clubs, Sheffield United and Sheffield Wednesday , are known as the Steel City derby . The city is also home to the World Snooker Championship and the Sheffield Steelers , the UK's first professional ice hockey team. The name Sheffield , has its origins in Old English and derives from the name of a principal river in the city, the River Sheaf . This name, in turn,
12971-528: The ugliest town in the Old World ". The Great Depression hit the city in the 1930s, but as international tensions increased and the Second World War became imminent; Sheffield's steel factories were set to work manufacturing weapons and ammunition for the war effort. As a result, the city became a target for bombing raids, the heaviest of which occurred on the nights of 12 and 15 December 1940, now known as
13090-487: The use of dissimilar materials (bronze against stainless steel) or using different stainless steels (martensitic against austenitic). Additionally, threaded joints may be lubricated to provide a film between the two parts and prevent galling. Nitronic 60, made by selective alloying with manganese, silicon, and nitrogen, has demonstrated a reduced tendency to gall. The density of stainless steel ranges from 7.5 to 8.0 g/cm (0.27 to 0.29 lb/cu in) depending on
13209-454: The west, and the lower-lying South Yorkshire Coalfield to the east. It lies at the confluence of five rivers: Don , Sheaf , Rivelin , Loxley and Porter . As such, much of the city is built on hillsides with views into the city centre or out to the countryside. Blake Street, in the S6 postcode area, is the third-steepest residential street in England, with a gradient of 16.6°. The highest point in
13328-503: The worst of this run-down of Sheffield's industries, along with those of many other areas of the UK. The building of the Meadowhall Centre on the site of a former steelworks in 1990 was a mixed blessing, creating much-needed jobs but hastening the decline of the city centre. Attempts to regenerate the city were kick-started when the city hosted the 1991 World Student Games , which saw the construction of new sporting facilities such as
13447-415: The yield strength to about 650 MPa (94,000 psi) at room temperature. Unlike the above grades, the mechanical properties and creep resistance of this steel remain very good at temperatures up to 700 °C (1,300 °F). As a result, A286 is classified as an Fe-based superalloy , used in jet engines, gas turbines, and turbo parts. Over 150 grades of stainless steel are recognized, of which 15 are
13566-453: Was 530,300, representing an increase of about 17,000 residents since 2001. Although a city, Sheffield is informally known as "the largest village in England ", because of a combination of topographical isolation and demographic stability. It is relatively geographically isolated, being cut off from other places by a ring of hills. Local folklore insists that, like Rome, Sheffield was built "on seven hills". The land surrounding Sheffield
13685-404: Was given before the release of the independent inquiry's report on the so-called "Sheffield Chainsaw Massacre". The report concluded that "thousands of healthy and loved trees were lost. Many more could have been" and was critical of Sheffield City Council. The latter issued this statement on receipt of the report: "the council has already acknowledged that it got many things wrong in the handling of
13804-476: Was one of the first to extensively use duplex stainless steel. Today, the oil and gas industry is the largest user and has pushed for more corrosion resistant grades, leading to the development of super duplex and hyper duplex grades. More recently, the less expensive (and slightly less corrosion-resistant) lean duplex has been developed, chiefly for structural applications in building and construction (concrete reinforcing bars, plates for bridges, coastal works) and in
13923-461: Was particularly hard hit during the 2007 United Kingdom floods and the 2010 'Big Freeze' . Many landmark buildings such as Meadowhall and the Hillsborough Stadium flooded due to being close to rivers that flow through the city. In 2010, 5,000 properties in Sheffield were identified as still being at risk of flooding. In 2012 the city narrowly escaped another flood, despite extensive work by
14042-537: Was recorded as a daytime maximum at Weston Park, on 20 December 2010 (from the Weston Park Weather Station statistics, which also can be viewed at Sheffield Central Library.) On average, through the winter months of December to March, there are 67 days during which ground frost occurs. The Weston Park Weather station, established in 1882, is one of the longest running weather stations in the United Kingdom. It has recorded weather for more than 125 years, and
14161-400: Was unsuitable for industrial use, and now includes several protected green belt areas. These topographical factors have served to restrict urban spread, resulting in a relatively stable population size and a low degree of mobility. After many years of decline, the Sheffield economy is going through a strong revival. The 2004 Barclays Bank Financial Planning study revealed that, in 2003,
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