1. HF-B Manganese Steel BallChemical Composition C(%)Si(%)Mn(%)Cr(%)Cu(%)Mo(%)P(%)S(%)0.48-0.500.17-0.370.6-1.0≤0.25≤0.25≤0.3≤0.035≤0.035Size 20-150mm(0.8inch-6inch) Hardness SeriousSurfaceVolume HardnessStandard Hardness48-53HRC46-51HRCHigh Hardness53-56HRC51-54HRCImpact 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=one ton); Drums(one drum=800-1000kgs)2.HF-C Manganese Steel BallChemical Composition C(%)Si(%)Mn(%)Cr(%)Cu(%)Mo(%)P(%)S(%)0.57-0.650.17-0.370.7-1.0≤0.25≤0.25≤0.3≤0.035≤0.035Size 20-150mm(0.8inch-6inch) Hardness SeriousSurfaceVolume HardnessStandard Hardness54-58HRC52-56HRCHigh Hardness56-60HRC54-58HRCImpact Value ≥15J/CM^2Balls Number ≥15000timesMicrostructure 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)3.HF-D Manganese Steel BallChemical Composition C(%)Si(%)Mn(%)Cr(%)Cu(%)Mo(%)P(%)S(%)0.62-0.700.17-0.370.9-1.0≤0.25≤0.25≤0.3≤0.035≤0.035Size 20-150mm(0.8inch-6inch) Hardness SeriousSurfaceVolume HardnessStandard Hardness56-60HRC54-58HRCHigh Hardness58-63HRC56-61HRCImpact Value ≥16J/CM^2Balls Number ≥15000timesMicrostructure 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)I. Production Process 1)Fully automatic production line of hot rolling steel ball Material on storage rack→automatic continued feeding device→furnace heating→enter into rolling ballmachine→automatic isothermal transfer→quenching system→steel ball heating preservation device→package→transport to warehouse2)Semi automatic production line of hot forging steel ballCutting raw material→furnace heating→preforging→rolling ball forging →automatic isothermal system transport→quenching system→steel ball heating preservation device→package→transport towarehouse3)Traditional production line of forged steel ballCutting raw material→furnace heating→forging→automatic isothermal system→quenching system→steel ball heating preservation device→package→transport to warehouse