... BS MSS DIN SH etc.Material: stainless steel flange, duplex stainless steel flange, nickel alloy steel flange. Stainless steel: ASTM A403 WP304,304L,316,316L, ... 321; ASTM A182 F304,304L,316,316L,321,904L,347, 904L,etc Duplex steel ... S32760,F904L/SAF 8904,F60/UNS S32205, etcNickel alloy steel: Alloy 20, Alloy 200/Nickel 200/uns s2200,alloy400 ...