... :Gr1,Gr2,Gr3,Gr5,Gr7,Gr9,Gr12 2.Standard: ASTM B338,B337,B861,B862 3.OD 0.6-320mm,WH 0.4 ... ,GR4,GR5,GR7,GR9,GR123mm-219mm0.4-10mmMax 10000mmSpecificationASTM B338,ASTM B337,ASTM B861Chemical requirements NCHFeOAlVPaMoNiTiGr 10.030.080.0150.200.18/////balGr ...