| Chemical Components | ||||||||
| Type | Chemical components | |||||||
| C | Si | Mn | Cr | Mo | Cu | P | S | |
| Low-Cr | 1.8-3.3 | ≤1.5 | 0.3-1.5 | 1-3 | ≤1.0 | ≤0.8 | ≤0.10 | ≤0.10 |
| Medium-Cr | 1.8-3.3 | ≤1.2 | 0.3-1.5 | 4-9 | ≤1.5 | ≤0.8 | ≤0.10 | ≤0.10 |
| High-Cr | 1.8-3.3 | ≤1.2 | 0.3-1.5 | 10-18 | ≤1.0 | ≤1.2 | ≤0.10 | ≤0.06 |
| Superhigh-Cr | 1.8-3.3 | ≤1.2 | 0.3-1.5 | 19-30 | ≤2.0 | ≤1.2 | ≤0.10 | ≤0.06 |
| Mechanical Properties and Microstructure | ||||
| Type | Hardness | Falling times | Microstructure | Impact Toughness |
| Low-Cr | ≥45 | ≥8000 | M+C | ≥5 |
| Medium-Cr | ≥50 | ≥12000 | M+C | ≥5 |
| High-Cr | ≥58 | ≥15000 | M+C | ≥5 |
| Superhigh-Cr | ≥60 | ≥22000 | M+C | ≥5 |
| P-Pearlite C-Carbide M-Martensite | ||||
| Nominal diameter (mm) | Weight of single ball in average (g) | Quantity/ MT | Surface hardness | Endurance impact test (Times) |
| Φ15 | 13.8 | 72549 | >60 | >10000 |
| Φ17 | 20.1 | 49838 | >10000 | |
| Φ20 | 32.7 | 30607 | >10000 | |
| Φ25 | 64 | 15671 | >10000 | |
| Φ30 | 110 | 9069 | >10000 | |
| Φ40 | 261 | 3826 | >10000 | |
| Φ50 | 510 | 1959 | >10000 | |
| Φ60 | 882 | 1134 | >10000 | |
| Φ70 | 1401 | 714 | >10000 | |
| Φ80 | 2091 | 478 | >58 | >10000 |
| Φ90 | 2977 | 336 | >10000 | |
| Φ100 | 4084 | 245 | >8000 | |
| Φ120 | 7057 | 142 | >8000 | |
| Φ130 | 8740 | 115 | >8000 |

Chromium content ≥10.0% are called high chromium ball, the national standard requirements of high chromium ball hardness (HRC) must be more than 58, impact value AK ≥3.0J/ 2, must use high temperature quenching + tempering treatment.
Chromium content 1-3%% are called low chromium ball.



1. Bag(1000-2000KG)
2. Drum(850-950KG)








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