Medium Chrome Casting Grinding Ball

Medium chrome casting grinding ball Chromium composition: 3.0-7.0% Meduim chrome casting alloy grinding ball is higher hardness,lower wear rate,good toughness and less are widely used in mining, power plant, cement and magnetic materials industries. In the using process, the surface hardness getting higher and the wear resistant getting strengthen, at the same time, the production capacity of ball mill getting improved. Diameter(mm) Φ8 Φ10 Φ12 Φ15 Φ17 Φ20 Φ25 Φ30 Φ40 Φ50 Φ60 Φ70 Φ80 Φ90 Φ100 Φ110 Φ120 Φ130 Chemical Composition Name Designation C Si Mn Cr P S Mo Medium chrome casting grinding ball ZQCr8 2.1-3.3 ≤1.5 0.3-1.5 7~10 ≤0.1 ≤0.08 0.02-1.0 ZQCr5 2.1-3.3 ≤1.5 0.3-1.5 4~6 ≤0.1 ≤0.08 0.02-1.0 Properties and Microstructure Name Designation Surface  Hardness（HRC Core  Hardness (HRC) Impact Value(J/CM2) Microstructure Time of falling balls Medium chrome casting grinding ball ZQCr8 ≥50 ≥47 2 P+C ≥10000 ZQCr5 ≥48 ≥45 2 P+C ≥10000 Tolerance of Diameter Diameter Φ10-Φ25 25<�Φ<60 60<�Φ≤100 100<�Φ Tolerance of Diameter +1.0 +1.5 +2.0 +3.0 -1.0 -1.0 -1.0 -1.0