Non-sag tungsten, or doped-tungsten, is extremely resilient to deformation (sagging) under high endurance conditions. SMI Ltd.’s experienced engineers have developed a number of non-sag and creep resistant wires that are now widely used in the lighting industry.

 

Classification Characteristics Applications W31 Standard doped tungsten with excellent non-sagging property. Filaments for bulb lamps and fluorescent lamps, heaters for electron tubes. W41 Tungsten wires with re-crystallization point lower than that of W31 and excels in reforming. Vacuum metalizing material and high temperature structural material. W91 Excels in non-sagging property and a best fit for high temperature use. Filaments for halogen lamps. W99 Tungsten wires with re-crystallization point higher than that of W91 and excels non-sagging property Filaments for halogen lamps with longer life. WKMT10 Thoria Tungsten Wire (and Rods). Commonly used in inert gas welding (TIG) and plasma welding. Can carry 50% more current than tungsten, and produces a more stable arc. Prematerial for lamp electrodes are available at diameters from 0.25 to 2 mm. Filaments for magnetrons for microwave ovens

 

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