Alloy residence permit-90

  • 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-90
    Designation GOST Latin BHZh-90
    Transliteration VNG-90
    By chemical elements ВNiFe-90

    Description

    Alloy residence permit-90 is used: for the manufacture of parts of cylinders, sleeves, slozhnofigurnye workpieces with curved surfaces: rotors, gyroscopes, inertial masses, erosion sonicelectronix, funnels for shaped charges, biological protection from gamma radiation.

    Note

    Powder heavy tungsten-Nickel-iron alloy.

    Mechanical properties

    sT|s0,2, MPa σU, MPa d5, % KCU, kJ/m2
    The product of the powder sintered
    650-700 950-1000 15-20 392-490

    Description mechanical marks

    Name Description
    sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
    σU Limit short-term strength
    d5 Elongation after rupture
    KCU Toughness

    Physical characteristics

    Temperature r, kg/m3
    0 16900-17100

    A description of the physical symbols

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

    Technological properties

    Name The value
    Microstructure The microstructure of the alloy to be biphasic, consisting of a solid solution based on tungsten and a matrix consisting of a solid solution based on Nickel and iron.
    Particularities of production of goods Details of the alloy produced by powder metallurgy method, including hydrostatic extrusion, sintering (impregnation) in the environment of hydrogen and vacuum annealing. In the process of being sintered at 1350-1500 °C in the presence of a liquid phase occurs recrystallization of the tungsten powder with the formation of nearly spherical particles, ten times greater than the particle size of initial powder.