... steel,carbon steel,alloy steel 3. Size range: From ½” up to 60” "4. Schedule:SCH STD, XS, XXS, SCH 10 ~ SCH 1605. STANDARDS ... K500WPS 31254 S32750, UNS S32760 4 STAINLESS STEEL ASTM A403 WP304/304L, WP316/316L, WP321 ... WP347, WPS 312545 Duplex$super duplex stainless steel ASTM A 815 UNS S31803, UNS S32750, ... F9, F11, F12, F22, F913 STAINLESS STEEL STANDARDSCE and certification:ASTM A182 F304/304L, F316 ...