Consisting of pure tungsten (W) powder suspended in a matrix of copper (Cu), these alloys are readily machinable and known for good thermal and electrical conductivity, low thermal expansion, being non-magnetic, good performance under vacuum, 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:
- Electrodes for resistance welding
- Arc contacts and vacuum contacts in high/medium voltage breakers or vacuum interrupters
- Electrodes in electric spark erosion (EDM) cutting machines
- Heat sinks and heat spreaders for passive cooling of electronic devices
- Electronic packaging materials
- Radio base station components
- IGBT modules for hybrid-electric (HEV) and full-electric (EV) vehicles
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 | – |
| W68 Cu32 | 13.93 | 43 | 165 | – |
| W70 Cu30 | 14.18 | 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 |
