https://www.nickelalloytubes.com/products/duplex-steel-pipe-tube-flange.html
Duplex stainless steel flange contain alloying elements such as Mo, Cu, Nb, Ti, and N.
Duplex Steel Flange Provided By Yuhong
Duplex steel flanges are made from austenitic-ferritic stainless steel, which was designed to deliver higher strength and corrosion resistance than 300 series stainless steel.
As one of the leading industrial duplex flanges manufacturers in China, Yuhong Group can do ASTM A182/ASME A182 flange super duplex with material grades S31803, S32750, S32760, etc.