... . Grade:C45/CK45/S45C Size:90-800mm; Hot Forged steel round barSteel grade:Carbon steel:Chinese Standard:20#,25#,35#,45#,50#,60#;Japan ... ;Europe Standard:CK15,C.22,C45,CK45,C60,CK60;C45E;Alloy Steel:Chinese Standad:16Mn,20Mn,30Mn2,30Mn5,40Cr,Q345D,Q345E,Q390 ... after L/C dateManufacturer:Jiangsu Zhuhong Forging Co.,Ltd Special carbon steel forged round bar C45/S45C/CK45