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Tungsten

Tungsten

 
PHYSICAL DATA

          Atomic Number

          74

          Atomic Weight

          183.85

          Density [ 20°C / 68°F ]

          19.3 g/cm3

          Melting Point

          3410 °C

GENERAL INFO
          History

Discovered in 1783 by Juan Jose and Fausto Elhuijar in Vergara, Spain.  The name is derived from the Swedish words "tung sten" meaning heavy stone".  The symbol W originates from the mineral wolframite.

          Uses
  • Used in electrical and electronic filaments, elements, and contacts.
  • Carbide is used extensively for wear resistance in mining, metal working, and petroleum industries.
  • Salts used in chemical and tanning industries.
  • Sulfide is used as high temperature lubricant.
  • Tungstates used in fluorescent lighting.
  • Used in steel making to increase toughness, hardness, and hot strength.  Also improves high temperature wear resistance.
FORMS
          Typical
          Pure forms: Tungsten compounds:
  • Ingots
  • Powder
  • Minerals (wolframite, scheelite)
  • Tungstates
  • Oxides
  • Carbides
  • Tungsten Bearing Ferro Alloys
          F.W.W.
   

Acknowledgements

  
F.W. Winter
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