steel pipe fittings Size:1/2"-48" Material:A234-WPB,A420-WPL6,A234-WP12,A234-WP11,A234-WP5 1.Materials:Carbon steel,stainless steel,alloy steel, ... alloy,low-temperature alloy,austenitic stainless steel,duplex stainless steel,super duplex stainless steel,inferior duplex stainless steel etc. 2.Size:From 1/ ... industry,metallurgy,the shipping,urban construction and other professions carbon steel elbow