Tungsten (VA)

  • 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 В
    Designation GOST Latin B
    Transliteration V
    By chemical elements В
    Name The value
    Designation GOST Cyrillic ВА
    Designation GOST Latin BA
    Transliteration VA
    By chemical elements В

    Description

    Tungsten is used: for the production by powder metallurgy drawn bars forged and used for the manufacture of electronic devices, screens, high-temperature furnaces; wire for light sources.

    Standards

    Name Code Standards
    Wire from nonferrous metals and their alloys В74 GOST 19671-91
    Bars В55 TU 11-77
    Sheets and strips В53 TU 48-19-106-91
    Non-ferrous metals, including rare, and their alloys В51 TU 48-19-153-83

    Chemical composition

    Standard Si Fe Al Mo Ca W
    TU 11-77 - - - - - ≥99.95
    GOST 19671-91 0.001-0.006 ≤0.005 0.001-0.004 ≤0.03 ≤0.005 ≥99.95
    W is the basis.
    According to TU 11-77, the content of tungsten is indicated including the content of thorium oxide. The sum of impurities and additives is ≤ 0.050%. The sum of impurities and additives includes the following elements: iron, calcium, molybdenum, potassium, silicon, aluminum.
    According to GOST 19671-91 the chemical composition is given for tungsten grade VA.

    Mechanical properties

    Section, mm σU, MPa
    Wire in the delivery state according to GOST 19671-91. The cross-sectional diameter of the wire is specified in microns
    17.5-25.5 2671-4165
    127-250 1871-3430
    25.5-50 2156-4108
    50-77 2058-3773
    77-128 1871-3577

    Description mechanical marks

    Name Description
    σU Limit short-term strength