... :AISI4140,42CrMo4Chemical Composition :C : 0.42 - 0.47% , Si : 0.20 - 0.35% , Mn : 0.70 - 0.90% ,P/S : ... MAX.0.020% , Cr : 0.95 - 1.20%,Ni : Max.0.20% , Mo : 0.18 - 0.25% , Cu : Max.0 ... T Conditionaccording the customer requirement.Straightness:3mm/M Max.End bar must be saw cutting.Ultra sonic test: Sep1921-84 Class ... .Manufacturer:Jiangsu Zhuhong Forging Co.,Ltd Forged steel round bar SCM440