Special carbon steel forged round bars. Grade:C45/CK45/S45C Size:90-800mm; Hot Forged steel round barSteel ... Standard:AISI1020,AISI1040,AISI1045,AISI1050;Europe Standard:CK15,C.22,C45,CK45,C60,CK60;C45E;Alloy Steel:Chinese Standad:16Mn,20Mn ... Zhuhong Forging Co.,Ltd Special carbon steel forged round bar C45/S45C/CK45