... HRC35-45.Chemical elements:C: 0.5-0.6, S: 0.04MAX, Mn: 0.6-1.0, P: 0.04MAX, Si: 0 ... Si: 0.17-0.37, Cr: 0.4-0.6.Speciality:High hardness,no breakage,good wear resistance,even wearing ... and Low Chrome Alloyed Cast Grinding Ball:Chrome content:1.5-10%Size: dia25-150mmHardness:HRC 50-60 Name ... :58-62 HRCPackingMedal Drum/Export Bag/CartonMOQNo less than 1 Metric TonPayment:TT L/C at sightTime of Delivery: ...