| Treatment | Nitriding | Nitro-carburizing | ||||
| Gas | Temperature (°C) | Time (h) | Temperature (°C) | Time (h) | Thickness [μm] | |
| Base | NH3 | 510 | 3 | 550 | 4 | 20 ± 1 |
| A1 | NH3 | 510 | 3 | 580 | 4 | 22 ± 3 |
| A2 | NH3 | 510 | 3 | 580 | 3 | 19 ± 1 |
| A3 | NH3 + N2O | 510 | 3 | 580 | 3 | 27 ± 1 |
| A4 | NH3 + N2O | 510 | 2 | 580 | 3 | 27 ± 1 |