... ) Size: 1/2" - 72"3) Material: Carbon Steel, Stainless Steel, Alloy Steel, Duplexsuper duplex stainless steelASTM: Carbon Steel: ASTM A234 WPB, WPC; ASTM A420 WPL9, WPL3 ... /304L, WP316/316L, WP321, WP347, WPS 312545 Duplex$super duplex stainless steel ASTM A 815 UNS S31803, UNS S32750, UNS S32760 STANDARDSANSI ... also produce according to the customer requirement. P 91 Alloy steel Cross for power plant