... seat ring 1).Material: Stainless Steel, Duplex, Cobalt base alloy, Nickel base alloys, etc Metal Ring GasketMaterial: Stainless Steel, Duplex stainless ... 20Stellite 20Alloy T-400Tribaloy 400Alloy T-800Tribaloy 800Alloy 31Stellite 31 Nickel base alloys, etc Alloy 200Nickel 200N02200Alloy 201Nickel 201N02201Alloy 400Monel 400N04400Alloy ...