... SH etc.Material: stainless steel flange, duplex stainless steel flange, nickel alloy steel flange. Stainless steel: ASTM A403 WP304,304L,316,316L ... /UNS S32760,F904L/SAF 8904,F60/UNS S32205, etcNickel alloy steel: Alloy 20, Alloy 200/Nickel 200/uns s2200,alloy400/monel 400/uns s4400 ...