Copper tungsten contact materials are dual phase materials produced through powder metallurgy processes. Their compositions range from 25% to 50% copper. They are produced through unit compaction techniques and therefore the fabrication costs are relatively high. Discrete contacts are available, usually supplied with a solder flush applied. Contact assemblies are also supplied. Where high volumes are required, furnace brazing is the most economical method of attachment. Where volumes are lower, resistance brazing or torch brazing techniques are more economical.
The compositions listed are generally considered the industry standards. The listed values represent the typical properties of these materials. Modifications to meet special applications may be possible.