... 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;US Standard:AISI1020,AISI1040,AISI1045,AISI1050;Europe Standard:CK15,C.22,C45 ... dateManufacturer:Jiangsu Zhuhong Forging Co.,Ltd Special carbon steel forged round bar C45/S45C/CK45