... GradeStandardseamless steel tubesand pipesfor structural purposeGB/T8162-199910, 20, 35, 45, 40Mn2, 45Mn2, 27SiMn, 20Cr, 40Cr, 20CrMo, 35CrMo, 38CrMoA1, 50CrV, 30CrMnSiASTM A500 ... -98 ASTM A501-98 ASTN A519-98 JIS G3441-1994 JIS G3444-1994Seamless steel tubes and pipes forliquid ...