... serviceASTM A106A, B, CStandard specification forSeamless Carbon Steel Boiler Tubes for High-PressureServiceASTM A192/ ... C, DStandard specification forHot-Formed Welded andSeamless Carbon SteelStructural TubingASTM A501A501Alloy steel tubes for machine purposesJIS ... SCM415TK,SCM418TK,SCM420TK,SCM430TK,SCM435TK, SCM440TK,Common structural Carbon steel tubeJIS G3444STK390, STK400, STK500, STK490, ...