Breadcrubs

We are Distributors and Suppliers of 2507 super duplex stainless steel.

Click Here for Super Duplex / Duplex Products Latest Hot Price List


super duplex stainless steel wiki. ( From wikipedia.org)

In metallurgy, stainless steel, also known as inox steel or inox from French "inoxydable", is a steel alloy with a minimum of 10.5%[1] chromium content by mass.

Stainless steel does not readily corrode, rust or stain with water as ordinary steel does. However, it is not fully stain-proof in low-oxygen, high-salinity, or poor air-circulation environments.[2] There are different grades and surface finishes of stainless steel to suit the environment the alloy must endure. Stainless steel is used where both the properties of steel and corrosion resistance are required.

Stainless steel differs from carbon steel by the amount of chromium present. Unprotected carbon steel rusts readily when exposed to air and moisture. This iron oxide film (the rust) is active and accelerates corrosion by forming more iron oxide; and, because of the greater volume of the iron oxide, this tends to flake and fall away. Stainless steels contain sufficient chromium to form a passive film of chromium oxide, which prevents further surface corrosion by blocking oxygen diffusion to the steel surface and blocks corrosion from spreading into the metal's internal structure.[3] Due to the similar size of the steel and oxide ions, they bond very strongly and remain attached to the surface.

Passivation occurs only if the proportion of chromium is high enough and oxygen is present.

History

An announcement, as it appeared in the 1915 New York Times, of the development of stainless steel
A few corrosion-resistant iron artifacts survive from antiquity. A famous example is the Iron Pillar of Delhi, erected by order of Kumara Gupta I around AD 400. Unlike stainless steel, however, these artifacts owe their durability not to chromium but to their high phosphorus content[citation needed], which, together with favorable local weather conditions, promotes the formation of a solid protective passivation layer of iron oxides and phosphates, rather than the non-protective cracked rust layer that develops on most ironwork.

The corrosion resistance of iron-chromium alloys was first recognized in 1821 by French metallurgist Pierre Berthier, who noted their resistance against attack by some acids and suggested their use in cutlery. Metallurgists of the 19th century were unable to produce the combination of low carbon and high chromium found in most modern stainless steels, and the high-chromium alloys they could produce were too brittle to be practical.

In the late 1890s Hans Goldschmidt of Germany 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 today be considered stainless steel.

Friedrich Krupp Germaniawerft built the 366-ton sailing yacht Germania featuring a chrome-nickel steel hull in Germany in 1908.[5] 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 austenitic stainless steel as Nirosta.

Similar developments were taking place contemporaneously in the United States, where Christian Dantsizen and Frederick Becket 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.

Also in 1912, Harry Brearley of the Brown-Firth research laboratory in Sheffield, England, while seeking a corrosion-resistant alloy for gun barrels, discovered and subsequently industrialized a martensitic stainless steel alloy. The discovery was announced two years later in a January 1915 newspaper article in The New York Times.[4] 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.[10] Brearley applied for a US patent during 1915 only to find that Haynes had already registered a patent. Brearley and Haynes pooled their funding and with a group of investors formed the American Stainless Steel Corporation, with headquarters in Pittsburgh, Pennsylvania.[11]

In the beginning stainless steel was sold in the US under different brand names like "Allegheny metal" and "Nirosta steel". Even within the metallurgy industry the eventual name remained unsettled; in 1921 one trade journal was calling it "unstainable steel".[12] In 1929, before the Great Depression hit, over 25,000 tons of stainless steel were manufactured and sold in the US.

Our Export Market

Central/South America

North America

Asia

Mid East/Africa

Western Europe

Australasia

Eastern Europe

UAE

Our Sales Location

Sri Lanka Bahrain
Russia Egypt
Portugal Turkey
Spain Singapore
Brazil Thailand
Chile Malaysia
Venezuela Indonesia
Costa Rica Poland
USA, U.A.E Italy
Oman Canada
Saudi Arabia Angola
Qatar

Super Duplex and Duplex Other Links

super duplex stainless steel / super duplex stainless steel pdf / super duplex stainless steel grades / super duplex stainless steel properties / super duplex stainless steel chemical composition / difference between duplex and super duplex stainless steel / super duplex stainless steel casting grades / super duplex stainless steel wiki / super duplex stainless steel suppliers in uae / super duplex steel grades / multiaxial forging of super duplex steel / super duplex steel tubing / 2507 tubing / duplex stainless steel alloys / stainless steel 304 vs 316 / type 304 vs 316 / ss 304 vs 316 / super duplex 2507 pipe / uns s32750 super duplex / super duplex density / duplex 2507 stainless steel properties / 2507 stainless steel / alloy 2507 composition / 2507 super duplex Swagelok Company / super duplex pipe / super duplex alloy / s32760 super duplex / s32750 super duplex / uns s32760 steel / super duplex material / super duplex stainless steel / super duplex stainless steel grades / super duplex 2507 / super duplex uns s32750 / super duplex pren / super duplex stainless steel properties / 2507 duplex stainless steel / super duplex ss 2507 / what is 2507 ss material / alloy 2507 composition / uns s32750 super duplex / 25cr duplex / alloy 2507 sheet / 2507 bar / 2205 duplex stainless steel / 2205 duplex stainless steel data sheet / 2205 duplex stainless steel chemical composition / 2205 duplex stainless steel properties / duplex 2205 seamless pipes / duplex 2205 for plate heat exchangers / 2205 duplex tube / ss 2205 duplex