1.Forged steel round bar 2.Size: 90mm-800mm 3.Diameter tolerance:-0/+6mm ... 4.HS:7304199000 1.Item:Forged steel round bar 2.Steel grade: 1)Carbon steel: Chinese Standard: 20#, 25#, 35#, 45#, 50 ... , C. 22, C45, CK45, C60, CK60; C45E; 2)Alloy Steel: Chinese Standad: 16Mn, 20Mn, 30Mn2, 30Mn5, 40Cr, Q345D, Q345E, Q390; 42CrMo ...