Thus we conclude that appropriate selection of tool material is never an easy task for novice manufacturers. All aspects have to be considered before making any kind of a decision. The five most commonly used materials are copper, brass, zinc, tungsten, graphite. These fall into two main categories Metallic and Graphite. Metallic are further divided into common metals, tungsten, tungsten composites and exotics.
Copper is the best known of the lot.
Brass and zinc complete the lot. These materials have a high electric and thermal conductivity's. They are easily obtainable, consistent in quality and low in cost. But they do have a few drawbacks. Copper has the highest melting point of them all which is only 1100 degrees Celsius.