... SH etc.Material: stainless steel flange, duplex stainless steel flange, nickel alloy steel flange. Stainless steel: ASTM A403 WP304,304L,316 ... 8904,F60/UNS S32205, etcNickel alloy steel: Alloy 20, Alloy 200/Nickel 200/uns s2200,alloy400/monel 400/uns s4400, alloy 600/inconel ...