| Casting | Average grain size/mm | |
| Casting temperature/˚C | Cooling | |
| 1420 | Air cooling | 3.1 |
| 1420 | Wind cooling | 2.8 |
| 1460 | Air cooling | 1.7 |
| 1460 | Wind cooling | 1.9 |
| 1490 | Air cooling | 2.0 |
| 1490 | Wind cooling | 2.1 |