Tungsten Copper Alloy | WCu

HTWW1133

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Tungsten-copper alloy is a composite material of tungsten and copper, forming a two-phase structure. It is commonly produced using powder alloy technology. Heeger Materials offers premium tungsten-copper alloy products at highly competitive prices. These alloys are available in various forms such as heat sinks, plates, and rods, and can also be customized to meet specific requirements.

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Data sheet

MaterialsTungsten Copper Alloy
Purity99.9% - 99.99%
StandardASTM B 702

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Tungsten copper (WCu) alloy is a composite material that combines the thermal conductivity benefits of copper with the low thermal expansion properties of tungsten. By adjusting the tungsten content, its thermal expansion can be tailored to match materials such as silicon (Si), aluminum oxide (Al2O3), and beryllium oxide (BeO). Typically, the copper content ranges from 10% to 50%. This material has high density, excellent heat dissipation, high-temperature strength, and resistance to erosion.

WCu alloy offers the combined advantages of both tungsten and copper: it has good resistance to high temperatures and arc erosion, high strength, high density, good electrical and thermal conductivity, and low thermal expansion. Additionally, it is easy to machine. This makes it widely used in applications such as electrodes for resistance welding and electric spark erosion cutting machines, as well as arcing contacts and vacuum contacts in high and medium-voltage breakers or vacuum interrupters.

W-Cu Alloy Platestungsten-copper alloy, WCu

Tungsten Copper Alloy Specifications

  • Surface: No coating, electroplated Ni, Ni-Au, or electroless Ni
  • Tungsten Copper Plate: 300mm x 300mm x 0.5-50mm, customized
  • Tungsten Copper Rod: 2-200mm dia. x L, customized

Tungsten Copper Alloy Composition and Properties

Composites

Nominal Composition
 (% Weight)

Density
(g/cm3, ≥)

Electrical Resistivity
 (20°C, µΩ·cm, ≤)

Electrical conductivity
 (IACS%, ≥)

Hardness (≥)
 Brinell Hardness

Bending Strength

Mpa

Kgf/mm2

Mpa

Kgf/mm2

CuW50

50% Copper
 50% Tungsten

11.85

3.2

54

1128

115

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CuW55

45% Copper
 55% Tungsten

12.3

3.5

49

1226

125

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CuW60

40% Copper
 60% Tungsten

12.75

3.7

47

1373

140

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CuW65

35% Copper
 65% Tungsten

13.3

3.9

44

1520

155

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CuW70

30% Copper
 70% Tungsten

13.8

4.1

42

1716

175

667

68

CuW75

25% Copper
 75% Tungsten

14.5

4.5

38

1912

195

706

72

CuW80

20% Copper
 80% Tungsten

15.15

5.0

34

2158

220

736

75

CuW85

15% Copper
 85% Tungsten

15.9

5.7

30

2354

240

765

78

CuW90

10% Copper
 90% Tungsten

16.75

6.5

27

2550

260

804

82

We also provide Tungsten Carbide Copper and Tungsten Carbide Silver.

Tungsten Copper Alloy Applications

Tungsten copper heat sinks are extensively utilized in a variety of applications due to their excellent thermal conductivity and durability. These applications include:

  • Thermal mounting plates for effective heat dissipation.
  • Chip carriers for reliable component support.
  • Flanges and frames in RF and microwave packages.
  • Laser diode packages and complex carriers for optoelectronic devices like amplifiers, receivers, transmitters, and tunable lasers.

Additionally, tungsten copper serves in other high-performance areas such as:

  • Aerospace materials for robust performance in demanding environments.
  • Vacuum contact materials and electrodes for electric discharge machining (EDM).
  • Arcing contacts and vacuum contacts in high- and medium-voltage breakers or vacuum interrupters.
  • Heat spreader materials and electrodes for resistance welding.
  • Electronic packaging materials to ensure efficient thermal management and reliability.

Tungsten Copper Alloy Packing

Tungsten Copper alloys will be tagged and labeled externally to ensure efficient identification and quality control. Great care will be taken to avoid any damage caused during storage or transportation. They will be packed in a carton or wooden case supported with soft materials to ensure the products will not shift inside the cases.

Tungsten Copper (WCu) Alloy Packing

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