Alloy 17KHNGT (ЭИ814)

  • Alloy 40KHNM (EI995)
  • Alloy 97NL (EI996)
  • Alloy 95NLM (EI996M)
  • Alloy 95NLVF (EI996V)
  • Alloy 68NKHVKTU (EP578)
  • Alloy 46NKhT (EP619)
  • Alloy 45NHT (EP218)
  • Alloy 44NCTU
  • Alloy 42NKhTUA (H41KhTA)
  • Alloy 42NKHTU (42NKHTUA)
  • Alloy 40KHMVTU
  • Alloy 36KhNTU (EI702)
  • Alloy 36NKhTYu8M (EP52)
  • Alloy 36NKhTU5M (EP51)
  • Alloy 36NKhTU (EI702)
  • Alloy 21NKMT (VES-130)
  • Alloy 17KhNGT (EI814)
  • Alloy 12KhNKMTU (SP22)

    • Designation

    Name The value
    Designation GOST Cyrillic 17ХНГТ
    Designation GOST Latin 17XHGT
    Transliteration 17HNGT
    By chemical elements 17CrNiGeTe
    Name The value
    Designation GOST Cyrillic ЭИ814
    Designation GOST Latin EI814
    Transliteration EhI814
    By chemical elements -

    Description

    Alloy 17KHNGT used: for the manufacture of elastic sensing elements and spring parts for General and special purposes, operating at temperatures up to +250 °C; the elastic elements in Aviapribor and automatic systems for provocatively elements.

    Note

    The alloy is resistant to all climatic conditions and some corrosive environments, precipitation hardening, with a temporary resistance 1470−1720 MN/m2 (150- 175 kgf/mm2), with the normal elasticity modulus 196000 MN/m2 (20000 kgf/mm2).

    Standards

    Name Code Standards
    Classification, nomenclature and General rules В30 GOST 10994-74
    Wire, steel, alloy В73 TU 14-1-4435-88
    Tape В34 TU 14-1-4480-88
    Bars and shapes В32 TU 14-1-4508-88, TU 14-11-245-88
    Sheets and strips В33 TU 14-1-4509-88

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Al Ti
    GOST 10994-74 ≤0.05 ≤0.02 ≤0.02 0.8-1.2 16.5-17.5 ≤0.6 6.5-7.5 Rest ≤0.5 0.8-1.2
    Fe is the basis.
    According to GOST 10994-74, the chemical composition is given for the alloy grade 17HNGT (EI 814).
    According to TU 14-1-4508-88 the chemical composition is given for the alloy of the brands 17HNGT (EI 814) and 17HNGT-VI (EI 814-VI).

    Mechanical properties

    σU, MPa d HB, MPa
    Bars hot rolled and forged on the other 14-1-4508-88. Quenching in water from 980-1000 °C (20 min exposure), + Extract at room temperature for 24 hours + Double dispersion aged at 420 °C (2 hours) and at 500 °C (1 h), air cooling
    ≥1420 ≥5 ≤375

    Description mechanical marks

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