alloy spring steel bar 1.60Si2Mn,SUP9,SUP10,65Mn 2.Size: ... *150 3.JISG4801/GB/T1222 4.Surface:Smooth,Double Grooved alloy spring steel barSpecification1) Grade:60Si2Mn,SUP7,55CrMnA,SUP9,50CrVA,SUP10 ... 850°C Oil 500 1275 1130 10% 40%6) Chemical Composition ChartGradeCSiMnCrVNiCuPS65Mn0.62-0.700.17-0.370.90-1.20 ... Co., LTD(CNHTC), Shandong Wuzheng(Group) Co., LTD and etc. alloy spring steel bar