Alloy residence permit 7-3

  • 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 ВНЖ 7-3
    Designation GOST Latin BHZh 7-3
    Transliteration VNG 7-3
    By chemical elements ВNiFe 7-3

    Description

    Alloy residence permit 7−3 is used: for the manufacture of small to medium sized parts with weight up to 2.0 kg of various forms used in instrument making and in the production of special equipment for protection from ionizing radiation and hard x-rays; parts of the defense industry, medical x-ray equipment; parts of the instrument applied, experimental and nuclear physics; beams and gyrocompasses in devices for orientation in space.

    Note

    Powder heavy tungsten-Nickel-iron alloy.

    Standards

    Name Code Standards
    Non-ferrous metals, including rare, and their alloys В51 TU 48-19-28-82, TU 48-19-54-91

    Chemical composition

    Standard Ni Fe W
    TU 48-19-54-91 6.8-7.4 2.8-3.4 Rest
    W is the basis.
    According to TU 48-19-54-91, the mass fraction of the components is indicated for the preparation of the powder mixture and is not subject to control on the products.

    Mechanical properties

    σU, MPa d5, % HRC
    The product of the powder sintered
    ≥687 ≥3 20-30

    Description mechanical marks

    Name Description
    σU Limit short-term strength
    d5 Elongation after rupture
    HRC Rockwell hardness (indenter diamond spheroconical)

    Physical characteristics

    Temperature r, kg/m3
    20 16500-17350

    A description of the physical symbols

    Name Description
    l Coefficient of thermal conductivity
    R UD. the resistivity