High-temperature furnaces must withstand high temperatures that melt materials, such as titanium, without damage. Usually made of graphite, these furnaces frequently cause contamination with reactive carbon, which can cause damage to the manufactured products. Fully metallic furnaces and heating elements made of suitable materials, on the other hand, are a clean solution.
Tungsten is one of the few materials that causes no contamination in a suitable atmosphere. With a melting point of 3400°C (6152°F), temperatures up to 2800°C (5072°F) can be reached in the high-temperature furnace with tungsten. The material is dimensionally stable, creep-resistant and durable. Only because tungsten is difficult to process has this material not become the accepted standard. Gesellschaft für Wolfram Industrie mbH has specialized in the processing and tailor-made delivery of heating elements made of tungsten (and also molybdenum) according to the specifications of furnace manufacturers. In addition, the characteristics of the heating elements can be adapted to individual requirements through non-sag doping and the addition of rare earths.