Cast iron VCH50

  • Cast iron VCh100
  • Crude iron VCh35
  • Cast iron VCh40
  • Crude iron VCh45
  • Cast iron VCh50
  • Cast iron VCh60
  • Crude iron VC70
  • VCh80 cast iron
  • Cast Iron MN
  • Cast iron MN40-10

    • Designation

    Name The value
    Designation GOST Cyrillic ВЧ50
    Designation GOST Latin BCh50
    Transliteration VCh50
    By chemical elements -

    Description

    Cast iron VCH50 used: for the manufacture of casting instead of steel casting weight from 500 to 6000 kg with the lowest allowable wall thickness 25 mm; stationary parts of steam turbines, turbine equipment, nuclear power plants, elements of steam boilers and pipelines, hydraulic turbines, hydraulic locks, and other equipment engineering: casting 2 groups, operating at temperatures up to 250 °C, exposed to high static and dynamic loads and friction (pistons, housings, bearing housings, housings worm wheels, bushings, bearing caps, nozzles, compressors, diaphragms, frames, Foundation, RAM exhaust parts, tube compressors, gear wheels, gear); castings group 1, operating at temperatures up to 350 °C and castings exposed to high specific pressures, static, dynamic loads and friction (diaphragms, clips, parts, compressors, steam turbines, valves, compressors, nozzles, diffusers, blade, liners, bearings, piston rings).

    Standards

    Name Code Standards
    Cast iron В11 GOST 7293-85, STP М319-95
    Cast iron castings (grey and malleable cast iron) В81 OST 108.962.01-85, OST 24.207.01-90

    Chemical composition

    Standard C S P Mn Cr Si Fe
    GOST 7293-85 3.2-3.7 ≤0.02 ≤0.1 0.3-0.7 ≤0.15 1.9-2.9 Rest
    STP М319-95 3.2-3.6 ≤0.02 ≤0.1 ≤0.7 ≤0.1 2.6-3.1 Rest
    Fe is the basis.
    According to GOST 7293-85 the chemical composition is given for castings with wall thickness up to 50 mm inclusive. For castings with a wall thickness exceeding 50 to 100 mm, the recommended content is C = 3.00-3.30%, Si = 2.20-2.60%. For castings with a wall thickness exceeding 100 mm, the recommended content is C = 2.70-3.20%, Si = 0.80-1.50%.

    Mechanical properties

    sT|s0,2, MPa σU, MPa d HB, MPa
    Castings on OST 1 90077-72
    ≥320 ≥500 ≥7 153-245

    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
    d Elongation after rupture
    HB Brinell hardness number

    Technological properties

    Name The value
    Microstructure Perlite or pearlitic-ferritic. Graphite is spherical.