Tungsten VM

  • Tungsten B (VA)
  • Tungsten BM
  • Alloy VNZH 7-3
  • Alloy VNZh-90
  • Alloy VNZh-95
  • Alloy VNZh-97 (VNZh 97.5)
  • Alloy VNM 3-2
  • Tungsten VRN
  • Tungsten VT-10
  • Tungsten VT-15
  • Tungsten BT-30
  • Tungsten BT-50
  • Tungsten BT-7
  • Alloy SVI-1

    • Designation

    Name The value
    Designation GOST Cyrillic ВМ
    Designation GOST Latin BM
    Transliteration VM
    By chemical elements ВCu

    Description

    Tungsten VM is used: for production of wire for the manufacture of light sources.

    Note

    Thoriated tungsten (tungsten with thorium).

    Standards

    Name Code Standards
    Wire from nonferrous metals and their alloys В74 GOST 19671-91

    Chemical composition

    Standard W Th
    GOST 19671-91 ≥99.7 0.17-0.25
    W is the basis.
    According to GOST 19671-91, the chemical composition is given for a tungsten alloy of the brand VM. The Thorium (Th) column indicates the mass fraction of thorium oxide in the alloy, which should be in the range 0.17-0.25. The total mass fraction of impurities should not be more than 0.050%.