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What is a tungsten-copper alloy?

Publication date:

2025-10-09

Author:

Source:

What is a copper-tungsten alloy?

Industrial components that utilize alloy of copper and tungsten (Made primarily from a material containing between 70% and 90% tungsten and between 10% and 30% copper), these products—manufactured using copper diffusion processes—combine high density with exceptional resistance to high temperatures, as well as outstanding electrical and thermal conductivity.

I. Tungsten and Copper Key Features
Physical Properties

W70 grade ≥13.8 g/cm³, W85 grade reaches 15.9 g/cm³ (about twice as much as steel);

Conductivity: electrical conductivity 30%-42% IACS (W75 type: 42% IACS);

High temperature resistance: softening temperature 900°C; it exhibits heat absorption through copper evaporation at 3000°C (metallic sweating effect).

II. Main models and specifications

Model Tungsten content Copper content Density (g/cm³) Electrical conductivity (% IACS) Hardness (HV)

W70 70% 30% 13.8-14.0 42 ≥185

W75 75% 25% 14.5-15.0 38 ≥200

W80 80% 20% 15.0-15.5 35 ≥200

W85 85% 15% 15.9 30 ≥240

III. Applications of Alloys copper and tungsten
Electrodes for electrical discharge machining

They are used for machining carbide threaded fasteners (specifications M2-M30) and exhibit arc erosion resistance, offering a service life three times longer than copper electrodes. Copper and tungsten sheets.

High-voltage electrical contacts

They are used as contacts for switches and circuit breakers, and offer excellent resistance to arc erosion to ensure the stability of electrical equipment.

High-temperature structural components

Rocket nozzle throat linings and nuclear power cooling elements, utilizing the metal sweating effect for heat dissipation at high temperatures. Tungsten-copper alloy rods.

Welding consumables

Conductive nozzles (circular/square inner diameter) that provide resistance to wear and deformation during wire feeding.

Craftsmanship

Tungsten-copper alloy circuits, tungsten-copper rings, tungsten-copper bracelets, tungsten-copper crafts, and more.

On the previous page:

What is a tungsten carbide blade?

Tungsten and cobalt prices continue to rise.

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