Tungsten Copper Information
What is tungsten copper alloy
Tungsten copper alloy is a pseudo-alloy of copper and tungsten. As copper and tungsten are not mutually soluble, the material is composed of distinct particles of one metal dispersed in a matrix of the other one. The microstructure is therefore rather a metal matrix composite instead of a true alloy.
The material combines the properties of both metals, resulting in a material that is heat-resistant, ablation-resistant, highly thermally and electrically conductive, and easy to machine.
Parts are made from the CuW alloy by pressing the tungsten particles into a desired shape, sintering the compacted part, then infiltrating with molten copper. Sheets, rods and bars of the alloy are available as well.
Commonly used tungsten copper alloy contains 10–50 wt.% of copper, the remaining portion being mostly tungsten. The typical properties of the alloy depend on its composition. The alloy with less wt.% of copper has higher density, higher hardness and higher resistivity. The typical density of CuW90 alloy, with 10% of copper, is 16.75 g/cm3 and 11.85 g/cm3 for CuW50 alloy. CuW90 has higher hardness and resistivity of 260 HB kgf/mm2 and 6.5 µΩ.cm than CuW50.
Typical properties of commonly used tungsten copper composition
| Composition | Density |
Hardness |
Resistivity |
IACS |
Bending strength |
wt. % |
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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