... steel round bar Q345B, 304,316,20Cr,40Cr,20CrMo,35CrMo,42CrMo Wide supply range with qualified product Hot rolled steel ... round bar Q345B, 304,316,20Cr,40Cr,20CrMo,35CrMo,42CrMoProduct introduction1. Diameter: 25-480mm2.Length: normally as 6m, ... Standard:GB, JIS, DIN, ASTM, ASME, ISO5.Material quality: steel round bar comes along with Mill Test Certiicate, includes chemical composition and ...