China Carbon Steel Ball,Carbon Steel Ball Manufacturer
| STEEL BALL GB308-89 ISO3290 2002(E) | |||
| Grade | Vdws ball dia variation | sph deviation From Spherical From | Surface Roughness |
| No Larger Than | |||
| um | |||
| 3 | 0.08 | 0.08 | 0.012 |
| 5 | 0.13 | 0.13 | 0.02 |
| 10 | 0.25 | 0.25 | 0.025 |
| 16 | 0.4 | 0.4 | 0.032 |
| 20 | 0.5 | 0.5 | 0.04 |
| 28 | 0.7 | 0.7 | 0.05 |
| 40 | 1 | 1 | 0.08 |
| 60 | 1.5 | 1.5 | 0.10 |
| 100 | 2.5 | 2.5 | 0.125 |
| 200 | 5 | 5 | 0.2 |
