... Grade:C45/CK45/S45C Size:90-800mm; Hot Forged steel round barSteel grade:Carbon steel:Chinese Standard:20#,25#,35#,45#,50#,60#;Japan ... ,34CrNiMo6,39CrNiMo3,17NiCrMo6,18CrNiMo7-6,S355J2G3,ASTM A105,ST52-3,16MnCr5,20MnCr5,16MnCrS5,20MnCrS5,21CrMoV511,56NiCrMoV7,18NiCrMo5,30CrNiMo8,34NiCrMo16, ... forged diameter tolerance: -0/+8mm; RT diameter tolerance:-0/+3 mmGrain size: as per ASTM E112-96 Grade 5 or ...