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Duplex Stainless Steel (DSS) refers to stainless steel in which ferrite and austenite each account for about 50%. Generally, the content of the smaller phase needs to be at least 30%. In the case of low C content, the Cr content is 18%~28% and the Ni content is 3%~10%. Some steels also contain alloying elements such as Mo, Cu, Nb, Ti, and N. Duplex stainless steel has the characteristics of both austenitic and ferritic stainless steel. Compared with ferrite, it has higher plasticity and toughness, no room temperature brittleness, significantly improved intergranular corrosion resistance and welding performance, while still maintaining Ferritic stainless steel is brittle at 475°C, has high thermal conductivity, and has superplasticity and other characteristics. Compared with austenitic stainless steel, it has high strength and significantly improved resistance to intergranular corrosion and chloride stress corrosion. Duplex stainless steel has excellent pitting corrosion resistance and is also a nickel-saving stainless steel. Here are material grades Digital GB standard ASTM standard S21860 14Cr18Ni11Si4AlTi S21953 022Cr19Ni5Mo3Si2N S31500 S22160 12Cr21Ni5Ti S22293 022Cr22Ni5Mo3N S31803 S22053 022Cr23Ni5Mo3N S32205,2205 S23043 022Cr23Ni4MoCuN S32304,2304 S22553 022Cr25Ni6Mo2N S31200 S25554 03Cr25Ni6Mo3Cu2N S32550,255 S25073 022Cr25Ni7Mo4N S32750,2507 S27603 022Cr25Ni7Mo4WCuN S32760 S22153 022Cr21Ni3MoN S32003 S22294 03Cr22Mn5Ni2MoCuN S32101 S22152 022Cr21Mn5Ni2N S32001 S22193 022Cr21Mn3Ni3Mo2N S81921 S22253 022Cr22Mn3Ni2MoN S82011 S22353 022Cr23Ni2N S32202 S22493 022Cr24Ni4Mn3Mo2CuN S82441 Talk with Zyta for more duplex steel ,for sheets,coils, bars, pipes,tubes All we can suppl you, Welcome to talk .