Special carbon steel forged round bars. Grade:C45/CK45/S45C Size:90-800mm; Hot Forged steel round barSteel grade:Carbon steel:Chinese Standard:20#,25#,35#,45 ... #,50#,60#;Japan Standard:S20C,S25C,S35C,S45C,S55C,S60C ... L/C dateManufacturer:Jiangsu Zhuhong Forging Co.,Ltd Special carbon steel forged round bar C45/S45C/CK45