Alloy 40HNU (ЭП793)

  • Alloy 40KhNu (EP793)

    • Designation

    Name The value
    Designation GOST Cyrillic 40ХНЮ
    Designation GOST Latin 40XHJu
    Transliteration 40HNYu
    By chemical elements 40CrNiAl
    Name The value
    Designation GOST Cyrillic ЭП793
    Designation GOST Latin EP793
    Transliteration EhP793
    By chemical elements -

    Description

    Alloy 40HNU used: for the manufacture of parts non-magnetic corrosion resistant bearings and other parts for special purposes.

    Standards

    Name Code Standards
    Bars and shapes В32 GOST 22411-77, TU 14-1-2740-79
    Bars and shapes В22 GOST 2590-2006
    Wire, steel, alloy В73 TU 14-1-1957-77

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Al
    TU 14-1-2740-79 ≤0.03 ≤0.01 ≤0.01 ≤0.1 39-41 ≤0.1 Rest ≤0.6 3.3-3.8
    Ni is the basis.

    Mechanical properties

    Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2 HRC
    Bars hot rolled and forged 8-100 mm on THAT 14-1-2740-79. Quenching in water from 1140-1160 °C + Vacation 540-560 °C (maintained for 5 h), air cooling
    25 - - - - - ≥57
    Bars hot rolled and forged 8-100 mm on THAT 14-1-2740-79. Quenching in water from 1140-1160 °C + Vacation 800-840 °C (aging 12-24 hours), air cooling
    25 ≥1080 ≥1275 ≥10 ≥15 ≥98 ≤45

    Description mechanical marks

    Name Description
    sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
    σU Limit short-term strength
    d5 Elongation after rupture
    y The relative narrowing
    KCU Toughness
    HRC Rockwell hardness (indenter diamond spheroconical)