Mill Grinding Balls, Grinding Cylpebs and Grinding Rods
Medium Chromium Cast Iron Grinding Balls
PRODUCT PARAMETERS
Description
Medium Chrome Alloy Cast Grinding Balls offer a balance between hardness, toughness, and cost-effectiveness.
Diameter tolerance：
| Diameter (mm) | Φ<30 | 30<Φ<60 | 60<Φ<80 | 80<Φ<100 | Φ>100 |
| Diameter tolerance(mm) | +1,-1 | +1.5,-1 | +2,-1 | +2.5,-1 | +3,-1 |
Technical specification：
| Material | Diameter(mm) | Hardness(HRC) | Breakage rate | Impact value(J/cm²) | Drop times(times) | Micro structure |
| ZQCr5 | 17-150 | >47 | <1% | >2 | ≥10000 | M+C |
Chemical composition
| Material | Chemical composition(%) | ||||||||
| ZQCr5 | C | Si | Mn | Cr | Mo | Cu | Ni | P | S |
| 2.1-3.3 | 1.5max | 0.3-1.5 | 4.0-6.0 | 0-1.0 | 0-0.8 | – | ≤0.10 | ≤0.10 | |
Features:
- Material Composition – Typically contain 5-10% chromium (Cr) along with carbon (C), manganese (Mn), and other alloying elements like molybdenum (Mo) and nickel (Ni).
- Moderate Hardness – Hardness ranges from 48-58 HRC, lower than high-Cr balls but higher than low-Cr balls.
- Balanced Wear Resistance – Offers better wear resistance than low-Cr balls but slightly lower than high-Cr balls.
- Improved Toughness – Less brittle than high-Cr cast balls, reducing the risk of breakage in high-impact applications.
- Corrosion Resistance – Performs well in both wet and dry grinding conditions.
- Heat Treatment – Quenching and tempering improve wear resistance and mechanical properties.
- Applications – Used in cement plants, power stations, and mineral processing, especially in conditions that require both durability and cost efficiency.
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FAQs
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