... SIZE:20-150MM 2.HARDNESS:55-65 3.APPLIED FIELD: MINES, CEMENT PLANTS, POWER STATIONS,CHEMICAL INDUSTRIE Grinding steel ball1. ... STEEL BALLSA.SIZE:40-150MMB.HARDNESS:55-65C.APPLIED FIELD: MINES, CEMENT PLANTS, POWER STATIONS,CHEMICAL INDUSTRIED.CHEMICALELEMENTS:C:0.7 ... NO BREAKAGES,GOOD WEAR RESISTANCE,EVEN WEARING.F.APPLIED FIELD: MINES, CEMENT PLANTS, POWER STATIONS,CHEMICAL INDUSTRIES...3.RCAB-2 NEW ...