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Help CenterForged Steel Grinding Balls HRC55-65 Low Breakage High Impact Toughness For SAG Mill Ball Mill Mining
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Forged Steel Grinding Balls – High Impact Toughness, Low Breakage for SAG Mills & Ball Mills
Product Description
Ningguo Huafeng supplies forged steel grinding balls manufactured by hot-rolling or hot-forging from premium alloy steel rounds (45#, 50Mn, 60Mn, 65Mn, B2, B3). After quenching and tempering heat treatment, these balls achieve high hardness (55-67 HRC), excellent impact toughness (≥12 J/cm²), and low breakage rate (≤1%), making them ideal for SAG mills and ball mills in mining, cement and thermal power plants.
Key Technical Parameters
- Diameter: 20mm – 150mm
- Surface Hardness: 55 – 67 HRC
- Core Hardness: 50 – 63 HRC
- Hardness Difference (surface to core): ≤5 HRC
- Impact Toughness: ≥12 J/cm²
- Breakage Rate: ≤1% (20-80mm); ≤1.5% (90-150mm)
- Falling Ball Test: ≥10,000 – 20,000 cycles
- Microstructure: Tempered Martensite + Bainite
- Heat Treatment: Quenching + Tempering
Why Choose Forged Steel Balls Over Cast Balls?
- Higher impact toughness: ≥12 J/cm² – withstands SAG mill impacts
- No deformation: Maintains spherical shape throughout service life
- No cracking: Forging process eliminates casting defects
- Uniform hardness: Surface to core difference ≤5 HRC
- Long service life: Lower consumption per ton of ore
Raw Material Options
| Grade | Application | Hardness (HRC) |
|---|---|---|
| 45# | General grinding | 55-60 |
| 50Mn/60Mn | Mining, cement | 58-62 |
| 65Mn | High impact | 60-65 |
| B2 | SAG mills | 60-63 |
| B3 | Heavy-duty SAG mills | 62-65 |
Applications
- Mining: Iron ore, copper ore, gold ore, nickel ore
- Semi-autogenous mills (SAG mills) – mill diameter >6m
- Ball mills in mineral processing
- Cement plants: Raw material and finish grinding
- Thermal power plants: Coal pulverizing
Contact us – provide your mill type (SAG or ball mill), diameter, ore type, and target hardness grade for a competitive quotation.
Send Inquiry to This Supplier
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