... alloy steel elbowSpecifications: 1/2"-----72" (seamless : 1/2"---24" butt-welding : 26"----72" )Thickness: sch 5s-----160Standard: GB, ANIS, JIS, BS, DIN,Material: carbon steel , stainless steel, alloy ... industry, fire control and environment protection, etc Note:Carbon steel: 10#,20#,A3, 20G.16Mn,ASTM A234,ASTM A105and ... ,12Cr1SMoVK,10CrMo910,15CrMo,12Cr2Mo1,A335P22,St45.8,A10bB alloy steel elbow