Cast iron CNMG

  • Cast iron CHN2X
  • Cast iron CHN3KhMDSh
  • CHNMH cast iron
  • ChNMSh cast iron
  • Cast iron CHNCHMD
  • ChNKhMDSh cast iron
  • ChS5 cast iron
  • ChS5Sh cast iron
  • Cast iron ChX1
  • Cast iron ChX2
  • Cast iron ChX3
  • ChKh3T cast iron
  • CHUCHS cast iron

    • Designation

    Name The value
    Designation GOST Cyrillic ЧНМХ
    Designation GOST Latin ChHMX
    Transliteration ChNMH
    By chemical elements ZrНMoCr

    Description

    Cast iron CNMG used: for the production of bimetallic brake shirts and sectors obtained by pouring cast iron into molds by placing them before the pouring of steel frames (blanks).

    Note

    Alloy cast iron pearlitic class.

    Standards

    Name Code Standards
    Castings with special properties (iron and steel) В83 OST 1 90167-75

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Mo
    OST 1 90167-75 3-3.8 ≤0.1 ≤0.3 0.6-1 0.15-0.45 1.6-2.5 0.8-1.4 Rest 0.2-0.5
    Fe is the basis.
    According to OST 1 90167-75, the residual content of titanium is allowed up to 0.15%. Replacement of molybdenum with triple amounts of tungsten is allowed. In the case of some small deviations from the established norms of chemical composition (except for carbon), decisive factors for determining the suitability of castings are hardness, microstructure and weldability in accordance with the requirements of this OCT.

    Mechanical properties

    σU, MPa HB, MPa
    Castings on OST 1 90167-75
    ≥196 170-255
    - 163-217

    Description mechanical marks

    Name Description
    σU Limit short-term strength
    HB Brinell hardness number

    Technological properties

    Name The value
    Microstructure The microstructure of the pot part of the casting is evaluated with points according to GOST 3443-57 by comparison with standards appropriate scales. Quantitative and qualitative characteristics of the microstructure of castings on OST 1 90167-75, which are accepted as suitable, shall conform to the following standards: perlite - scale I, points: N, П95, faculty and Ппс95; fastenau the eutectic - scale scores: Фв1, Фв2, FD1 and Фр2; cementite - scale 5, points: Цп2 and Цп4; graphite scale 6, points: Г06, and G12, scale 7, points: Гд5, Гд7 and Гд8, scale 9, score: Gr2, Гр4, Гр7 and Гр10.