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Help CenterHigh Chrome Cast Grinding Balls Cr 10%-30% Ultra Hardness 58-65HRC Extremely Low Breakage For Hard Rock Mining
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High Chrome Cast Grinding Balls – Ultra High Hardness for Extreme Abrasion
Product Description
For the most demanding grinding applications – hard rock mining with high abrasion – Ningguo Huafeng presents our premium high chrome cast grinding balls. With chromium content up to 30% and surface hardness reaching 65 HRC, these balls deliver exceptional wear resistance and extremely low breakage (≤0.5%).
Key Technical Parameters
- Diameter: φ20mm – φ120mm
- Cr Content: 10% – 30% (choose high or ultra-high grade)
- Surface Hardness: 58 – 65 HRC
- Core Hardness: 54 – 60 HRC
- Impact Value: ≥3.0 J/cm²
- Breakage Rate: ≤0.5% (ultra-high chrome)
- Microstructure: Martensite + M7C3 Carbide
- Heat Treatment: Oil Quenching + Tempering (double temper)
Performance Comparison
| Grade | Hardness (HRC) | Breakage (%) | Wear Resistance | Relative Life |
|---|---|---|---|---|
| High Chrome (10-18%) | 58-62 | ≤1 | Very High | 2x standard |
| Ultra-High Chrome (20-30%) | 62-65 | ≤0.5 | Extreme | 3x standard |
Ideal Applications
- Iron ore (magnetite, hematite)
- Copper ore (porphyry, sulfide)
- Gold ore (free-milling, refractory)
- Nickel ore, lead-zinc ore
- Any high-impact, high-abrasion SAG or ball mill
Why Pay More for Ultra-High Chrome?
- Lower grinding media consumption – up to 50% less than standard high chrome
- Reduced downtime – minimal recharging frequency
- Better mill throughput – consistent ball charge
- Long-term cost savings despite higher upfront cost
Contact us – for hard rock mines, we recommend a trial container of ultra-high chrome balls. Provide your ore work index and mill parameters for a customized proposal.
Send Inquiry to This Supplier
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