1, Good electrical conductivity, 2, High arc resistance combined, 3, Low thermal expansion. Chemical composition: W: 50%-90%, Cu is the balance Processing method: Powder Metallurgy (Melt Infiltration)Density: 11.85-16.75g/cm³ .Thermal Conductivity: as per your requestThermal Expansion Coefficient: 4.62x10-6 centigrade degreeApplication: They are used for electric resistance welding, electric ...