1. High hardness
2. High toughness
3. Good wear resistance
4. No mal-roundness
Type and Chemical Composition of Forging Grinding Steel Ball
| Name | Material | C | Mn | Si | Cr | S | P |
| DZ-1 | 50Mn | 0.48-0.56 | 0.70-1.0 | 0.17-0.37 | ≤0.25 | ≤0.035 | ≤0.035 |
| DZ-2 | 60Mn | 0.57-0.65 | 0.70-1.0 | 0.17-0.37 | ≤0.25 | ≤0.035 | ≤0.035 |
| DZ-3 | 65Mn | 0.60-0.70 | 0.90-1.2 | 0.17-0.37 | ≤0.25 | ≤0.035 | ≤0.035 |
| DZ-4 | B2 | 0.70-0.85 | 0.70-0.80 | 0.17-0.37 | 0.2-0.7 | ≤0.03 | ≤0.03 |
| DZ-5 | 75SiMn | 0.70-0.90 | 0.70-1.20 | 0.4-0.8 | ≤0.25 | ≤0.03 | ≤0.03 |
| DZ-6 | Wear-resistant Alloy | 0.50-0.65 | 0.4-1.0 | 1.4-1.8 | 0.9-1.2 | ≤0.03 | ≤0.03 |
Physical Property of Forging Grinding Steel Ball
| Name | Material | Impact Test(Ak.J/cm²) | Endurance Test Times(5m/T) | Surface Hardness (Φ25mm- Φ60mm) | Core Hardness (Φ25mm- Φ60mm) | Surface Hardness (Φ70mm- Φ100mm) | Core Hardness (Φ70mm- Φ100mm) | Breakage |
| DZ-1 | 50Mn | ≥12 | ≥10000 | ≥56 | ≥35 | ≥56 | ≥28 | <1% |
| DZ-2 | 60Mn | ≥13 | ≥10000 | ≥58 | ≥38 | ≥58 | ≥29 | <1% |
| DZ-3 | 65Mn | ≥15 | ≥12000 | ≥60 | ≥42 | ≥60 | ≥30 | <1% |
| DZ-4 | B2 | ≥17 | ≥12000 | ≥60 | ≥52 | ≥60 | ≥50 | <1% |
| DZ-5 | 75SiMn | ≥16 | ≥12000 | ≥60 | ≥50 | ≥60 | ≥48 | <1% |
| DZ-6 | Wear-resistant Alloy | ≥17 | ≥12000 | ≥60 | ≥54 | ≥60 | ≥52 | <1% |
Weight and Microstructure of Forging Grinding Steel Ball
| Norminal Diameter | Diametrical Tolerance(mm) | Approx Weight of Single Ball(kg) | Average Number of One MT | Microstructure |
| 25mm/1'' | +1.5,-0.5 | 0.064 | 15625 | M+B+C (M-Martensite;B-Bainitic;C-Carbide) |
| 30mm/1.25'' | +1.5,-0.5 | 0.11 | 9090 |
| 40mm/1.5'' | +2.0,-1.0 | 0.26 | 3846 |
| 50mm/2'' | +2.0,-1.0 | 0.51 | 1961 |
| 60mm/2.5'' | +3.0,-2.0 | 0.89 | 1124 |
| 70mm/2.75'' | +3.0,-2.0 | 1.4 | 714 |
| 80mm/3.25'' | +3.0,-2.0 | 2.1 | 476 |
| 90mm/3.5'' | +3.0,-2.0 | 3 | 333 |
| 100mm/4'' | +4.0,-3.0 | 4.1 | 244 |
| 110mm/4.5'' | +4.0,-3.0 | 5.47 | 283 |
| 120mm/4.75 | +4.0,-3.0 | 7.1 | 141 |
| 130mm/5'' | +4.0,-3.0 | 9.02 | 111 |
Forging Grinding Steel Ball
