... Stainless Welded Steel Pipes&TubesMaterial: 20#, 45#, 45Mn2, 16Mn (Q345B) ASTM A106, A53, A210, A1345Standard: GB, ASTM, JIS, ... .800.035max0.035max0.25max0.25max0.25max16Mn,ASTM A210 Gr. C,DIN St52 0.12~0 ... .200.20~0.551.20~1.600.035max0.035max0.25max0.25max0.25max45Mn2,ASTM ... Pipeline Materials to oil field and refinery as Steel Pipes, Pipe Fittings, Flange, Valves, Gasket, Petroleum ...