Tungsten, a silver-gray metal, is mined from scheelite and wolframite and appears in nature in four major forms combined with calcium, iron or manganese. Most current mine production of tungsten is from vein/stockwork, skarn, porphyry and strata-bound deposits. Minor amounts are produced from pegmatite, breccia and placer deposits. It has a high melting point and density, good thermal and electrical conductivity, a low coefficient of expansion as well as exceptional strength at elevated temperatures. It is consumed predominantly as tungsten carbide in cutting and wear-resistant components as well as an alloying agent in steel making. Also, often as an alloy, it is used for lamp and lighting filaments and electrodes, electrical and electronic contact surfaces, heat and radiation shielding in high-temperature furnaces and X-ray equipment, and electrodes in certain welding methods. Some non-metallurgical applications of tungsten are as phosphorescent chemicals in pigments, X-ray screens, television picture tubes and fluorescent lighting. Tungsten is also used in armor-piercing ordnance and tank shielding. The name tungsten comes from the Norse word thungr-steinn, which means "heavy stone."
Ferro Tungstenh Improving the hot hardenability, abrasion resistance and impact strength of steel, used in production of high-speed tool steel, alloy tool steel, heat-resistant steel, spring steel and magnetic steel.
Specifications and Packing:
Grade and Chemical Composition
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Packing: In iron drum of 100kg net each.
Size: 10-130MM 90%min
Customer special requests available.