Grinding Balls / 65Mn
65Mn Mill Ball
C: 0.65–0.75%, Mn: 0.90–1.20% | 58–63 HRC
Metal ore and hard rock grinding
Technical Specifications
Chemical Composition
C: 0.65–0.75%, Mn: 0.90–1.20%
Hardness
58–63 HRC
Application
Metal ore and hard rock grinding
Diameter Range
Φ20 mm – Φ150 mm
Standards
GB/T 17445, ISO 3290, ASTM A532
Heat Treatment
Quenching & Tempering
Dimension Table
| Diameter | Weight | Hardness | Tolerance |
|---|---|---|---|
| 30 mm | 0.111 kg | Surface > 58 HRC, Core > 57 HRC | ±2 mm |
| 40 mm | 0.264 kg | Surface > 58 HRC, Core > 57 HRC | ±2 mm |
| 50 mm | 0.515 kg | Surface > 58 HRC, Core > 55 HRC | ±3 mm |
| 60 mm | 0.890 kg | Surface > 58 HRC, Core > 55 HRC | ±3 mm |
| 70 mm | 1.413 kg | Surface > 58 HRC, Core > 55 HRC | ±3 mm |
| 80 mm | 2.110 kg | Surface > 58 HRC, Core > 55 HRC | ±3 mm |
| 90 mm | 3.004 kg | Surface > 58 HRC, Core > 55 HRC | ±4 mm |
Other Grades
60Mn
Chemical Composition: C: 0.55–0.65%, Mn: 0.70–1.00%
Hardness: 55–60 HRC
Cement and limestone grinding mills
B2
Chemical Composition: C: 0.70–0.85%, Cr: 0.40–0.80%, Mn: 0.50–1.00%
Hardness: 60–65 HRC
Iron ore, coal and clinker grinding circuits
B3
Chemical Composition: C: 0.70–0.90%, Cr: 0.80–1.20%, Mo: 0.20–0.50%
Hardness: 62–66 HRC
High-impact and abrasive grinding environments
HIGH-CR
Chemical Composition: C: 1.00–1.30%, Cr: 10–12%
Hardness: 60–68 HRC
Gold, copper and highly abrasive ore grinding