| Sinters W/Cu base (infiltrated materials) | |||
| Code | Composition % | Typical applications | Description |
| K0/0 | 70 W - 30 Cu | - Contacts in gas (SF6) - Contacts in oil - Contacts in vacuum |
They are used for medium-high voltages in non oxidizing environments. |
| K0/1 | 75 W - 25 Cu | ||
| K0/2 | 77 W - 23 Cu | ||
| K0/3 | 80 W - 20 Cu | ||
| Sinters W/Ag base (infiltrated materials) | |||
| Code | Composition % | Typical applications | Description |
| WG2 | 70 W - 30 Ag | - Contacts in air - Contacts for oxidizing environment |
They are used for medium voltages also for oxidizing environment. |
| WG3 | 80 W - 20 Ag | ||
| WG4 | 75 W - 25 Ag | ||