... No.Normal Steel GradeCasing and TubingAPI 5CTJ55, N80, P110, L80, C90, T95Line pipeAPI 5LA, B, X42, X46, X52, X5, X60Drill ... pipeAPI 5DE-75, X-95, G-105, S-135Pipe steel, Black andhot-dipped ... forHot-Formed Welded andSeamless Carbon SteelStructural TubingASTM A501A501Alloy steel tubes for machine purposesJIS G3441SCr420TK, SCM415TK,SCM418TK,SCM420TK ...