1.HF-B2 Grinding Media BallChemical Composition C(%)Si(%)Mn(%)Cr(%)Cu(%)Mo(%)P(%)S(%)0.70-0.800.17-0.370.70-0.800.50-0.60≤0.25≤0.3≤0.035≤0.035Size 20-150mm(0.8inch-6inch) Hardness SeriousSurfaceVolume HardnessStandard Hardness56-60HRC54-58HRCHigh Hardness59-64HRC57-62HRCImpact Value ≥18J/CM^2Balls Number ≥18000timesMicrostructure 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=one ton); Drums(one drum=800-1000kgs)