Cast iron KCH55-4

  • Cr30-6 cast iron
  • Pig-iron КЧ33-8
  • Cr35-10 cast iron
  • Cr37-12 cast iron
  • Cr45-7 cast iron
  • Cast iron КЧ50-5
  • Cast iron KCh55-4
  • Cr60-3 cast iron
  • Cr65-3 cast iron
  • Cr70-2 cast iron
  • Cr80-1.5 cast iron
  • Cast iron PM1.3

    • Designation

    Name The value
    Designation GOST Cyrillic КЧ55-4
    Designation GOST Latin KCh55-4
    Transliteration KCh55-4
    By chemical elements -

    Description

    Cast iron KCH55−4 is used: for the manufacture of castings of machine parts that require high strength and ductility.

    Note

    Malleable cast iron pearlitic class, characterized by a mainly pearlitic microstructure of the metallic base.

    Standards

    Name Code Standards
    Cast iron castings (grey and malleable cast iron) В81 GOST 1215-79
    Pipes of ferrous metals and alloys, cast fittings to them В61 GOST 8943-75, GOST 8944-75, GOST 8946-75, GOST 8947-75, GOST 8948-75, GOST 8949-75, GOST 8950-75, GOST 8951-75, GOST 8952-75, GOST 8953-75, GOST 8954-75, GOST 8955-75, GOST 8956-75, GOST 8957-75, GOST 8958-75, GOST 8959-75, GOST 8960-75, GOST 8961-75, GOST 8962-75, GOST 8963-75

    Chemical composition

    Standard C S P Mn Cr Si Fe
    GOST 1215-79 2.5-2.8 ≤0.2 ≤0.1 0.3-1 ≤0.08 1.1-1.3 Rest
    Fe is the basis.
    According to GOST 1215-79, the mass fraction of carbon and silicon should be within the range of 3.60-3.90%. The chemical composition is given for the method of melting cupola-electric furnace.

    Mechanical properties

    σU, MPa d HB, MPa
    Castings on OST 1 90077-72
    ≥539 ≥4 192-241

    Description mechanical marks

    Name Description
    σU Limit short-term strength
    d Elongation after rupture
    HB Brinell hardness number