... to carve the mold. If we using normal copper for spark eletrode, copper eletrode will be consumed fastly, and ... be supplied on request, such asW80Cu20, W90Cu10, Silver tungsten electrode, For any question, please be free to contact us. High ... Applications :High Voltage Arc Contacts, Vacuum Contacts, Electrodes for Resistant Welding and Spark Erosion. tungsten copper spark electrode bars and bricks