... S45C Size:90-800mm; Hot Forged steel round barSteel grade:Carbon steel:Chinese Standard:20#,25#,35#,45#,50#,60#;Japan ... SNCM220; SACM645USA Standard:SAE4140,SAE4130,SAE9840,SAE4340,AISI4145H,SAE4150,SAE8620,Europe Standard:42CrMo4,25CrMo4,34CrNiMo6,39CrNiMo3,17NiCrMo6,18CrNiMo7-6,S355J2G3,ASTM ... L/C dateManufacturer:Jiangsu Zhuhong Forging Co.,Ltd Special carbon steel forged round bar C45/S45C/CK45