Cast iron Chia

  • S-Ni35 cast iron
  • Cast iron CHN
  • Cast iron CHN5G8 (GN8-5)
  • S-NiSiCr30-5-5 cast iron
  • S-NiSiCr20-5-2 cast iron
  • S-NiMn23-4 cast iron
  • S-NiMn13-7 cast iron
  • S-NiCr35-3 cast iron
  • S-NiCr30-3 cast iron
  • S-NiCr30-1 cast iron
  • S-NiCr20-3 cast iron
  • S-NiCr20-2 cast iron
  • S-Ni22 cast iron
  • L-NiSiCr30-5-5 cast iron
  • L-NiSiCr20-5-3 cast iron
  • L-NiMn13-7 cast iron
  • L-NiCuCr15-6-3 cast iron
  • L-NiCuCr15-6-2 cast iron
  • L-NiCr30-3 cast iron
  • L-NiCr20-3 cast iron
  • L-NiCr20-2 cast iron
  • L-Ni35 cast iron

    • Designation

    Name The value
    Designation GOST Cyrillic ЧЯ
    Designation GOST Latin ChJa
    Transliteration ChYa
    By chemical elements ZrЯ

    Description

    Cast iron Chia is used: for the production of castings for aircraft.

    Note

    Heat-resistant and acid-resistant Nickel cast iron austenitic.

    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 Ni Fe Cu
    OST 1 90077-72 2.5-3 ≤0.08 ≤0.3 0.5-1.2 1.5-2.5 1.5-2.5 14-17 Rest 6-8.5
    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

    σU, MPa d5, % HB, MPa
    Castings on OST 1 90077-72
    ≥177 ≥2 120-197

    Description mechanical marks

    Name Description
    σU Limit short-term strength
    d5 Elongation after rupture
    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 austenite, phosphide-carbide eutectic, the graphite plate and the twists, evenly spaced (plate length graphite is not more than 100 microns. with wall thickness up to 20 mm. and not more than 150 MK. with wall thickness more than 20 mm).
    Features of heat treatment According to OST 1 90077-72 castings are supplied without heat treatment.