Seamless Duplex Stainless Steel Pipe For Petroleum

A789 UNS 32520 Duplex Stainless Steel Seamless Pipe Specification DUPLEX is the duplex stainless steel (Duplex Stainless Steel pipe, referred to as DSS) abbreviation, refers to the ferritic and austenitic each accounted for about 50%, the general content of the lesser phase of the stainless steel at least need to reach 30%. In the case of low C content, Cr content of 18% to 28%, Ni content of 3% to 10%. Some steels also contain Mo, Cu, Nb, Ti, N and other alloying elements. International Specification ASTM A789 UNS S32750 Standard Specification ASME, ASTM, AISI, AMS, JIS, EN, SAE, DIN, NF, TOCT, DS, DTD, GB…