RCAB-2 hot rolled steel ball 1.size:20-60mm 2.HRC:60-64 3,high ... ,no breakage,good ductility,excellent quality, Rolled grinding media steel ball Specifications :1.hardness:60-65HRC2.impact strength: exceed 12J/cm23 ... abrasion depends on the specific mine ore, the temperature, the ball mill and other conditions.)The process line of productionPacking