Tungsten-copper contact materials are commonly used as arcing contacts in SF6 switchgear for high- and medium-voltage applications in energy transmission and distribution.

Properties of WCu Materials

• high resistance to arcing together with good electrical conductivity
• high strength tungsten matrix
• excellent machinability
• good thermal conductivity
• low thermal expansion
• can be joined to copper by casting

Various material compositions and grain sizes with tungsten content in the range 60 – 90% cover the complete range of requirements.