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.

Advantages

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

Applications

  • 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