Copper Tungsten

This refractory metal composite materials are a combination of tungsten combined with copper or silver. The manufacturing process is to press the refractory, sinter the pressed compact at a high temperature, and infiltrate with copper or silver. All this is done under very closely controlled conditions. The result is a relatively hard materials with superior arc and wear resistance, high physical properties at elevated temperatures, and good electrical and thermal conductivity.

copper tungsten bar
copper tungsten rod
copper tungsten plate
copper tungsten electrode

Advantages

  • Higher thermal conductivity
  • Low thermal expansion
  • High arc resistance combined with good electrical conductivity

Applications Involving Copper Tungsten

  • Heat sinks as passive cooling elements of electronic devices
  • Electrodes for resistance welding
  • Electrodes in electric spark erosion cutting machines
  • Arcing contacts and vacuum contacts in high and medium voltage breakers or vacuum interruptions

Copper Tungsten Technical Data

Composition Density Hardness Resistivity IACS Bending Strength
g/cm3°› HB Kgf/mm2°› µΩ.cm°‹ %°› Mpa°›
W50/Cu50 11.85 115 3.2 54 --
W55/Cu45 12.30 125 3.5 49 --
W60/Cu40 12.75 140 3.7 47 --
W65/Cu35 13.30 155 3.9 44 --
W70/Cu30 13.80 175 4.1 42 790
W75/Cu25 14.50 195 4.5 38 885
W80/Cu20 15.15 220 5.0 34 980
W85/Cu15 15.90 240 5.7 30 1080
W90/Cu10 16.75 260 6.5 27 1160



Tungsten Plates and Bars

They are mainly used for making finished tungsten wire, rods and plates and additives to precision alloys.

Tungsten Rods and Wires

They are mainly for electrical light sources, electrical contacts for vacuum coated films and heating elements, etc.