Tungsten Copper vs. Tungsten Silver: Which to Choose ?

Basic Performance Comparison

Tungsten Copper (WCu)

Higher hardness and rigidity

Better thermal conductivity

Higher mechanical strength at medium temperatures

Lower material cost

More widely available

Good arc resistance for industrial use

Tungsten Silver (WAg)

Better low-current arc stability

Smoother contact surface, less adhesion

Superior corrosion resistance

Better performance in low-voltage, low-current environments

Higher cost due to silver content

Application Differences

Choose Tungsten Copper (WCu) when:

You need parts for high-voltage circuit breakers, load switches

You use EDM electrodes, resistance welding electrodes

You require heat sinks, high-temperature structural parts

Cost control is important

High mechanical strength and thermal fatigue resistance are needed

Choose Tungsten Silver (WAg) when:

Used in low-voltage, small-current contactors

Working environment has high humidity or corrosion

You need extremely low contact resistance

Used in precision relays, automotive electronics, communication devices

Summary

For industrial power, EDM, welding, aerospace: Tungsten Copper is better and more cost-effective.

For precision low-current, anti-corrosion, high-end electrical contacts: Tungsten Silver performs better.

Most customers in mold processing, welding, high-voltage electricity, and heat dissipation choose Tungsten Copper Alloy.