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This refractory metal composite materials are a combination of tungsten combined with copper or silver. The manufacturing process is to press the refractory, sinter the pressed compact at a high temperature, and infiltrate with copper or silver. All this is done under very closely controlled conditions. The result is a relatively hard materials with superior arc and wear resistance, high physical properties at elevated temperatures, and good electrical and thermal conductivity.
   
Advantages
- Higer thermal conductivity
- Low thermal expansion
- High arc resistance combined with good electrical conductivity
Applications
- Electrodes for resistance welding
- Heat sinks as passive cooling elements of electronic devices
- Electrodes in electric spark erosion cutting machines
- Arcing contacts and vacuum contacts in high and medium voltage breakers or vacuum interruptions
Copper Tungsten Technical Data
| Composition |
Density |
Hardness |
Resistivity |
IACS |
Bending Strength |
| g/cm3≥ |
HB Kgf/mm2≥ |
µΩ.cm≤ |
%≥ |
Mpa≥ |
| W50/Cu50 |
11.85 |
115 |
3.2 |
54 |
-- |
| W55/Cu45 |
12.30 |
125 |
3.5 |
49 |
-- |
| W60/Cu40 |
12.75 |
140 |
3.7 |
47 |
-- |
| W65/Cu35 |
13.30 |
155 |
3.9 |
44 |
-- |
| W70/Cu30 |
13.80 |
175 |
4.1 |
42 |
790 |
| W75/Cu25 |
14.50 |
195 |
4.5 |
38 |
885 |
| W80/Cu20 |
15.15 |
220 |
5.0 |
34 |
980 |
| W85/Cu15 |
15.90 |
240 |
5.7 |
30 |
1080 |
| W90/Cu10 |
16.75 |
260 |
6.5 |
27 |
1160 |
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