TUNGSTEN

Tungsten is a refractory metal that has the highest melting point (6170 F) of any contact material. It is widely used in the light current range, up to 4-5 amperes, where the application calls for high resistance to electrical erosion, welding and mechanical wear. Typical of these applications are magnetos and horn relays.

Tungsten, unlike silver, will form stable oxides, which necessitates much higher forces than the other contact materials. Tungsten is so hard that is available only in composite form. The face configurations can be either flat or radius.

DMC-235 is a fine grain tungsten, end grain, cut from rod.

DMC-241 is an equiaxed grade employed to minimize stresses in applications where stress is detrimental.

Properties of Tungsten