Refractory meterials are a combination of tungsten or tungsten carbide with copper and/or silver. The result is a very hard material with superior arc and wear resistance, and strength at elevated temperatures, yet retaining good thermal and electrical conductivity.
The mechanical and physical properties vary with the composition. The thermal and electrical conductivity increases with the amount of copper or silver, while the hadness, strength and resistance to mechanical wear increase with the amount of tungsten or tungsten carbide. The application will determine the material choice.
Machining guidelines for copper/silver tungsten