HF-A Forging Steel Ball Chemical Composition C(%)Si(%)Mn(%)Cr(%)Cu(%)Mo(%)P(%)S(%)0.42-0.500.17-0.370.50-0.80≤0.25≤0.25≤0.3≤0.035≤0.035Size 20-150mm(0.8inch-6inch) Hardness SeriousSurfaceVolume HardnessStandard Hardness48-53HRC46-51HRCHigh Hardness52-55HRC50-53HRCImpact Value ≥12J/CM^2Balls Number ≥12000timesMicrostructure M CDiameter Tolerance(mm) 20-25mm30-60mm70-90mm100-140mm150mm±1±1.5 2,-2 2.5,-2 3,-2Roundness（%） ≤1%≤1%≤1.5%≤2%≤2% Theoretical Ball Weight DiameterWeightDiameterWeight20mm32.8g90mm2988.9g25mm64.0625g100mm4100g30mm110.7g110mm5457.1g40mm262.4g120mm7084.8g50mm512.5g125mm8007.8125g60mm885.6g130mm9007.7g70mm1406.3g140mm11250.4g80mm2099.2g150mm13837.5gApplication Cement plants, Mines, Power stations, Chemical industries, Other ball millsPackage Bags(one bag

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