Tungsten-copper alloy (W-Cu alloy) is a composite material that combines the high 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, resistance to erosion, and high electrical conductivity, making it an ideal choice for high-performance applications.

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, excellent electrical and thermal conductivity, and low thermal expansion. These properties make it particularly useful for electrical contacts, where both high electrical conductivity and efficient heat dissipation are essential. Additionally, it is easy to machine, making 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.

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

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.