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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