Casting Grinding Ball

Chemical Composition (%) Name Designation Chemical Composition (%) C Si Mn Cr Mo P S High Cr Cast Grinding Balls ZQCr26 2.0～2.8 ≤1.0 ≤1.5 22～28 ≤1.0 ≤0.10 ≤0.08 ZQCr20 2.0～2.8 ≤1.0 ≤1.5 18～22 ≤1.5 ≤0.10 ≤0.08 ZQCr17 2.0～3.0 ≤1.0 ≤1.5 15～18 ≤1.5 ≤0.10 ≤0.08 ZQCr13 1.7～3.0 ≤1.0 ≤1.5 11～15 ≤1.5 ≤0.10 ≤0.08 Common High Cr Cast Grinding Balls ZQCr10 According to customer requirements in the contract agreement. Properties and Microstructure Name Designation Hardness(HRC) ak(j/cm2) Microstructure Time of Falling Balls Quenching state(A) None-quenching state(A) High Cr Cast Grinding Balls ZQCr26 ≥56 ≥45   ≥4.0 M+C ≥8000 ZQCr20 ≥56 ≥45 ≥4.0 ≥8000 ZQCr17 ≥56 ≥45 ≥4.0 ≥8000 ZQCr13 ≥56 ≥45 ≥4.0 ≥8000 Low Chromium Grinding Ball Chemical Composition   Designation Chemical Composition (%) C Si Mn Cr Mo P S ZQCr2 2.2～3.5 ≤1.2 0.5-1.5 1.5～3.0 ≤1.0 ≤0.1 ≤0.1 Machanics Properties and Microstructure   Designation Hardness(HRC)   Impact Value ak(j/cm2)   Microstructure Time of Falling Balls ZQCr2 ≥45 ≥1.6 P+C ≥8000 Micro Ball Specification   Φ8 Φ10 Φ12 Φ15 Φ17 Φ20 Chemical Composition (%) Name C Si Mn Cr Mo Cu S P High Cr micro Ball 1.7-3.0 ≤1.0 0.4-1.2 10-12 0-0.5 0-0.8 ≤0.08 ≤0.1 Low Cr micro Ball 2.2-3.5 0.3-1.2 0.5-1.5 1.5-3.0 0-0.5 0-0.8 ≤0.1 ≤0.1 Mechanical Properties of Products Name Microstructure Hardness(HRC)   Impact Value ak(j/cm2)   High Cr micro Ball M+C ≥56 ≥3.0 Low Cr micro Ball P+C ≥45 ≥1.6 Specification and Avoirdupois   Ball Diameter(mm) Weight of Each Ball(kg)   Pcs/ton   Φ20 0.0322 31056 Φ25 0.063 15873 Φ30 0.11 9091 Φ40 0.257 3891 Φ50 0.50 2000 Φ60 0.867 1153 Φ70 1.37 729 Φ80 2.05 487 Φ90 2.9 345 Φ100 4.00 250 Φ110 5.3 188 Φ120 6.80 147 Φ125 7.75 129 Φ130 8.74 114 Φ150 13.5 74