... resistance,even wearing.Applied field:Mines,cement plants,power stations,chemical industries.2. MnA High Efficiency Forged Grinding BallSize: 25mm-150mmHardness: ... -90mm is HRC48-55,for dia100-150mm is HRC45-53.Chemical elements:C: 0.72-0.92, S: 0.04MAX, ... resistance,even wearing.Applied field:Mines,cement plants,power stations,chemical industries.3.High Chrome Alloyed Cast Grinding BallChrome content: ...