
Surface treatment / Coating properties examples
| Surface Treaments | Color | Coating material | Hardness [HV] | Thickness [μm] | Coating structure | Frict. coeff. against steel | Max. appl. temp. [°C] |
| ST | Dark grey | Fe3O4 | 400 | max. 5 | Conversion into the surface | – | 550 |
| Blue grey | TiCN | 3000 | 1 – 4 | Multi-layer gradient | 0.4 | 500 | |
| Black grey | TiAlN | 3300 | 3 | Nano structured | 0.3 – 0.35 | 900 | |
| Blue grey | AlCrN | 3200 | – | Mono-layer | 0.35 | 1100 |