... Forged steel round bar 2.Steel grade: 1)Carbon steel: Chinese Standard: 20#, 25#, 35#, 45#, 50#, 60#; Japan Standard: S20C, S25C, S35C, S45C, ... S55C, S60C; US Standard: AISI1020, AISI1040, AISI1045, AISI1050; urope Standard: CK15, C. 22, C45, CK45, C60, CK60; C45E; 2)Alloy Steel ... , B16, F11, F12, F22, F5, F9, 51Cr4 3)Tool Steel: 1.2714, H13, H11, P20, SKD61; Delivery condition: Forged+Normalized ...