Tungsten Copper Alloy (W-Cu alloy) High Voltage Arc Contacts, Vacuum Contacts, Electrodes for Resistant ... Welding and Spark Erosi Tungsten Copper Alloy (W-Cu alloy)As a high performance material,Tungsten-Copper is characterized ... , Vacuum Contacts, Electrodes for Resistant Welding and Spark Erosion. W-Cu alloy