| Material | Los elementos químicos | ||||
| C | Si | Mn | P/S | Cr | |
| B2 | 0.72-0.85 | 0.17-0, 37 | 0.7-1.0 | < 0.04 | 0.4-0.6 |
| 60mn | 0, 55-0.65 | 0.17-0, 37 | 0.7-1.0 | < 0.04 | < 0.25 |
| 45# | 0.42-0.50 | 0.17-0, 37 | 0.5-0.8 | < 0, 035 | ≤0, 25 |
| B3 | 0.58-0.66 | 1.6-1.9 | 0.65-0.8 | < 0.025 | 0.7-0.9 |
|
Material |
25mm-50mm HRC. |
60mm-90mm HRC. |
100mm-125mm HRC. |
|||
| Superficie | Core | Superficie | Core | Superficie | Core | |
| B2 | 60-65 | 58-62 | 58-63 | 50-55 | 56 a 60 | 40-45 |
| 60mn | 58-63 | 55-60 | 58-63 | 40-45 | 56 a 60 | 30-35 |
| 45# | 55-58 | 45-55 | 55-58 | 30-35 | 50-55 | 25-30 |
| B3 | 58-62 | 56 a 60 | ||||
|
(Mm)
Diámetro nominal |
(Mm)
La tolerancia Diametrical |
(Kg)
Peso aproximado Por bola |
Número medio
Por MT |
La microestructura |
| 25 | +1.5, -0, 5 | 0, 064 | 15625 |
M+B+C (M-Martensite. B-Bainitic; C-Carbide) |
| 30 | +1.5, -0, 5 | 0.11 | 9090 | |
| 40 | +2, 0, -1, 0 | 0.26 | 3846 | |
| 50 | +2, 0, -1, 0 | 0.51 | 1961 | |
| 60 | +3, 0, -2, 0 | 0.89 | 1124 | |
| 70 | +3, 0, -2, 0 | 1.4 | 714 | |
| 80 | +3, 0, -2, 0 | 2.1. | 476 | |
| 90 | +3, 0, -2, 0 | 3 | 333 | |
| 100 | +4.0, -3, 0 | 4.1. | 244 | |
| 110 | +4.0, -3, 0 | 5.47 | 283 | |
| 120 | +4.0, -3, 0 | 7.1. | 141 | |
| 130 | +4.0, -3, 0 | 9.02 | 111 |