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.