Cast iron ЧМ1,8

  • Cr21 cast iron
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  • ChNM1.2 cast iron
  • ChM1.8 cast iron
  • SCI cast iron
  • Cr35 cast iron
  • Cr30 cast iron
  • Cr25 cast iron
  • Cr24 cast iron
  • Cr20CrNi2 cast iron
  • Cr20KhN cast iron
  • Cr20 cast iron
  • Cr18 cast iron
  • Cr15 cast iron
  • Cr10 cast iron
  • Cast iron SCh03Ts01B
  • NKHT pig iron (NKHT)

    • Designation

    Name The value
    Designation GOST Cyrillic ЧМ1,8
    Designation GOST Latin ChM1,8
    Transliteration ChM18
    By chemical elements ZrMo1,8

    Description

    Cast iron ЧМ1,8 is used: for the production of castings for aircraft.

    Standards

    Name Code Standards
    Castings with special properties (iron and steel) В83 OST 1 90077-72

    Chemical composition

    Standard C S P Mn Cr Si Fe Cu
    OST 1 90077-72 2.8-3.6 ≤0.1 ≤0.3 0.6-1.2 0.2-0.4 1.3-1.9 Rest 1.5-2
    Fe is the basis.
    According to OST 1 90077-72, with the following mechanical properties and microstructure satisfactory, the following deviations in chemical composition are acceptable: for carbon ± 0.10%, for chromium, silicon, molybdenum, nickel and copper + 0.2% for each.

    Mechanical properties

    HB, MPa
    Castings on OST 1 90077-72
    207-262

    Description mechanical marks

    Name Description
    HB Brinell hardness number

    Technological properties

    Name The value
    Macrostructure and pollution The appearance of the fracture of castings on OST 1 90077-72 should be dense, fine-grained, light-gray, with no signs of chill. Surface of castings shall be cleaned of sand and metal penetration. Sprues, heaving, bays, growths and veining must be cut or polished by abrasive material in the tolerances on the drawing. Nikitina, crack and end-to-end sinks are not allowed.
    Microstructure According to OST 1 90077-72 microstructure of castings shall consist of lamellar pearlite and sarbatoarea, phosphides in the form of sharp inclusions of lamellar graphite and twists medium size of ferrite in the field of vision is not more than 10% of the eutectic graphite is not more than 10%.
    Features of heat treatment According to OST 1 90077-72 castings are supplied without heat treatment.