ASTM A790 UNS S31803 S32205 DUPLEX STEEL SAF2205

同创集团 deal with Austenitic Stainless Steel， Nickel Alloy Steel(Hastelloy ， Monel， Inconel， Incoloy ) seamless and welded pipe and tube already more than 25 years， every year sell more than 80000 tons of steel pipe and tube. Our client already cover more than 45 countries， Like Italy， UK， Gernmany， USA， Canada， Chile， Colombia， Saudi Arabia， Korea， Singapore， Austrial， Poland， France….And our group branch company and factory have been already approved by :ABS，DNV，GL，BV，PED 97/23/EC，AD2000-WO，GOST9941-81，CCS，TS，CNNC，ISO9001-2008，ISO 14001-2004。

ASTM A790 UNS S31803 is a specification in duplex steel material. The material is an alloy of steel with chromium and molybdenum in it. The addition of these materials makes the pipes stronger and much corrosion resistant. The SA 790 UNS S31803 one of the super duplex grades which is stronger and corrosion resistant. The duplex grades are divided into three groups as duplex， lean and super duplex. The super duplex is used for specific applications that operate under elevated temperatures. The Duplex UNS S31803 Pipes also possesses an elevated strength due to the production nature. The material could be hot rolled and welded or be cold drawn. The cold drawn pipes are seamless and have less absolute roughness which makes them precise in dimensions. The hot rolled and Welded A928 UNS S31803 material on the other hand is much stronger and could be used with welding applications. The ease of welding in the ASTM A790 UNS S31803 Tube makes it a choice for high pressure applications that will require extensive welding at installation.

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