Consisting of pure tungsten (W) powder suspended in a matrix of copper (Cu), these alloys are known for good thermal and electrical conductivity, low thermal expansion, and resistance to erosion from arcing. Thus, they are often used as electrical contacts, particularly in high voltage applications. Most sizes and shapes can be supplied with short lead times. We can also manufacture parts from these materials to your specifications.
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Advantages:
- High arc resistance combined with good electrical conductivity
- High thermal conductivity
- Low thermal expansion
Applications:
- Arc contacts and vacuum contacts in high/medium voltage breakers or vacuum interruptors
- Electrodes in electric spark erosion (EDM) cutting machines
- Heat sinks for passive cooling of electronic devices
- Electrodes for resistance welding
Copper Tungsten Alloy Chemical Composition & Properties Chart
| Composition | Density gr/cc |
IACS % |
Hardness HB Kgf/mm2 |
Bend Strength MPa |
| W55 Cu45 | 12.30 | 49 | 125 | – |
| W60 Cu40 | 12.75 | 47 | 140 | – |
| W65 Cu35 | 13.30 | 44 | 155 | – |
| W70 Cu30 | 13.80 | 42 | 175 | 667 |
| W75 Cu25 | 14.50 | 38 | 195 | 706 |
| W80 Cu20 | 15.15 | 34 | 220 | 736 |
| W85 Cu15 | 15.90 | 30 | 240 | 765 |
| W90 Cu10 | 16.75 | 27 | 260 | 804 |
