... Material: stainless steel flange, duplex stainless steel flange, nickel alloy steel flange. Stainless steel: ASTM A403 WP304,304L,316 ... S32760,F904L/SAF 8904,F60/UNS S32205, etcNickel alloy steel: Alloy 20, Alloy 200/Nickel 200/uns s2200,alloy400/monel 400 ... s4400, alloy 600/inconel 600/uns s6600, alloy 625/inconel 625/uns s6625, alloy 800/incoloy 800/uns s8800, alloy 825/ incoloy 825/uns s8825,alloy c/ ...