EDM electrode, composition copper tungsten(typical 70-80 wt%), capability to make the composition from Tungsten 30% to 90%. Our Copper tungsten alloy have high physical and mechanical properties, as well as high thermal and electrical conductivity, these properities make our copper tungsten materials very sutitable for the die inserts and electode facing. Our Copper tungsten alloy are designated as ASTMB702, RWMA Class 10, RWMA Class 11, RWMA Class 12, GB/T8320-2003. We can produce according to your drawing.