... /S45C Size:90-800mm; Hot Forged steel round barSteel grade:Carbon steel:Chinese Standard:20#,25#,35#,45#,50#,60#;Japan ... /d,E/e;As forged condition straightness: ≤4mm/m, RT bar straightness: ≤2mm/mAs forged diameter tolerance: -0/+8mm; RT diameter ... after L/C dateManufacturer:Jiangsu Zhuhong Forging Co.,Ltd Special carbon steel forged round bar C45/S45C/CK45