... Test:Sep1921 Class 3 C/c Hot forged steel round bar.Steel grade:Carbon steel:Chinese Standard:20#,25#,35#,45#,50#,60 ... Standard:CK15,C.22,C45,CK45,C60,CK60;C45E;Alloy Steel:Chinese Standad:16Mn,20Mn,30Mn2,30Mn5,40Cr,Q345D,Q345E, ... ,B7,B16,F11,F12,F22,F5,F9,51Cr4.Tool Steel:1.2714,H13,H11,P20,SKD61;Size:90mm to ... for customer.Mill:Jiangsu Zhuhong Forging Co.,Ltd Forged Round Shaft AISI 4140/42CrMo4+Q/T