1) High Hardness: Surface hardness is to 60-65 HRC and volume hardness is to 60-65 HRC;
2) High Impact Test Value: The impact toughness is more than 12 J/cm2;
3) Low Broken Rate: The actual broken rate is not higher than 1%;
4) Top Wear-resistance: The wear rate is 50-700 g/ton.
1. Chemical Composition of 60mm Steel Ball
| C | Mn | Cr | Si | S | P | |
| Max/% | 0.85 | 0.12 | 0.85 | 0.37 | 0.035 | 0.035 |
| Min/% | 0.57 | 0.70 | - | 0.17 | - | - |
2. Physical Properties of 60mm Steel Ball
Surface Hardness | Center Hardness | Volume Hardness | Metallographic Structure | Breakage Rate | Impact Test | Ball Test Time |
| HRC | HRC | HRC | J/cm2 | |||
| 60-65 | 60-65 | 60-65 | M+A | <1% | ≥12 | ≥20000 |
3. Specification of 60mm Forged Ball
| Diameter | Diameter Tolerance | Average Weight per Ball | Average Numbers Per Ton Ball | |
| mm | Inch | mm | g | pcs |
| 60 | 2.5'' | +3 / -2 | 0.888 | 1126 |
4. SGS Testing Report
