1.Hardness:HRC 52-60Chemical elements:C: 0.55-0.65 Si: 0.17-0.37 Mn:0.7-1.0 S&P:0.04max S:0.04 Cr:0.25max65Mn forged grinding ballDiameter:20mm-150mmHardness:HRC:56-63Chemical elements:C:0.62-0.70 Si:0.17-0.37 Mn:0.9-1.2 S&P:0.035max Cr:0.25max75MnCr forged grinding ballDiameter:20mm-150mmHardness:HRC:58-64Chemical elements:C: 0.72-0.92 Si: 0.17-0.37 Mn:0.7-1.0 S&P::0.04max Cr: 0.4-0.660Si2CrV forged grinding ballDiameter:20mm-150mmHardness:HRC60miChemical elements:C:0.56-0.64 Si:1.4-1.8 Mn:0.4-0.7 S & P:0.03max Cr:0.9-1.2High chrome casting ballsDiameter:20mm-150mmHardness:HRC: 58-64Chemical elements:Cr:15minc: 2.0-3.2 si:1max Mn: 0.5-2.5 S&P:0.08max3. Low chrome casting ballsDiameter:20mm-150mmHardness:HRC:46minChemical elements:Cr:1.5-3.5c: 2.2-3.4 si:1.2max Mn 0.5-1.5 P: 0.08max S:0.06max4.Medium chrome casting ballDiameter:20mm-150mmHardness:HRC: 56-62Chemical elements:Cr:11minc: 2.0-3.2 si:1max Mn: 0.5-2.5 P:0.08 max S:0.06max1. Professional in grinding ball2.Dia20-150mm3.high toughness4.low breakage5.high hardness
