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1.Chemical composition:
Casted grinding ball
Item | C | Cr | Si | Mn | S | P | Cu | Mo | Hardness |
Low Chrome | 1.8-3.5 | 1-3.5 | ≤1.2 | ≤1.5 | ≤0.15 | ≤0.15 | ≤0.5 | ≤1.0 | ≥45 |
Medium Chrome | 1.8-3.3 | 4-9 | ≤1.2 | ≤1.8 | ≤0.15 | ≤0.15 | ≤1.0 | ≤1.5 | ≥50 |
High Chrome | 1.6-3.3 | 10-15 | ≤1.0 | ≤2.5 | ≤0.10 | ≤0.10 | ≤1.5 | ≤1.0 | ≥55 |
Higher Chrome | 1.6-3.3 | 15-18 18-27 | ≤1.0 | ≤2.5 | ≤0.10 | ≤0.10 | ≤1.5 | <2.0 | ≥60 |
Forged grinding ball
Item | C | Cr | Si | Mn | S | P | Cu | Mo | Ni | Hardness |
Element | 0.72-0.82 | 0.25-0.60 | 0.17-0.37 | 0.7-1.10 | ≤ 0.035 | ≤0.035 | ≤0.1 | ≤0.25 | ≤0.1 | 55-65 |
2.Specification and Hardness of GrindingBall
Nominal diameter (mm) | Diameteical tolerance (mm) | Weight of Single of forging ball in average | Number of piece of One ton forging ball in average |
medium chrome dia 130mm cast iron steel balls
