Tungsten, as a chemical material, is with high hardness and ductility and high meliting points. So at normal state, the tangsten wire will not be easily rusted by air.

And the tungsten wire is widely used for  instrumentations, medical, militay  and  astronautic  industries.

The tungsten wire is also commonly applied in the following areas:

1) Vacuum metallizing applicant 

  2) Aluminum spraying, ceramic coating, metal, plastic, PVD

  3) Glass grubbers and stirrers, for mirror making

  4) E-beam, ion implantation