... ) Size: 1/2" - 72"3) Material: Carbon Steel, Stainless Steel, Alloy Steel, Duplexsuper duplex stainless steelASTM: Carbon Steel: ASTM A234 WPB ... -52, WPHY-60, WPHY-65, WPHY-70, WPHY-80 2 ALLOY STEELASTM A234 WP1, WP11, WP12, WP22, WP5, WP9, WP913 SPECIAL ... can also produce according to the customer requirement. P 91 Alloy steel Cross for power plant