OD:140-340mm WT:6-35mm Application:machine elements,pipe fittings,netware VarietyOD(mm)WT(mm)GradeStandardApplicationStructure pipe140-3406-3520#,35#, ... ,Q345E,20Mn2,30Mn2,40Mn2,20CrMo,30CrMo35CrMo,42CrMo GB/T8162Machine elements,pipe fittings,netware 140-340 6-35 35#,45#,27SiMn,20SiMn4,30CrMo4 ... -18 360,410,460,490,500,510 GB/T5312Ship boiler pipe,pipeline