Alloy HN58VMKJUR (ЭП238)

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    • Designation

    Name The value
    Designation GOST Cyrillic ХН58ВМКЮР
    Designation GOST Latin XH58BMKJuP
    Transliteration HN58VMKYuR
    By chemical elements CrNi58ВCuCoAlHg
    Name The value
    Designation GOST Cyrillic ЭП238
    Designation GOST Latin EP238
    Transliteration EhP238
    By chemical elements -

    Description

    Alloy HN58VMKJUR used: for the manufacture of hot-rolled bars; different details of responsible use of power plant engineering, engine building, turbine; details of special equipment.

    Note

    High-temperature Nickel-based alloy.

    Standards

    Name Code Standards
    Bars and shapes В32 GOST 23705-79, TU 14-1-223-72

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu Al B Mo W Ce Co
    TU 14-1-223-72 ≤0.08 ≤0.01 ≤0.015 ≤0.3 7.5-9 ≤0.4 Rest ≤1 ≤0.07 6.1-6.7 ≤0.02 3-5.5 6-8 ≤0.02 13.5-16
    Ni is the basis.
    According to GOST 23705-79 the chemical composition is given for alloy ХН58ВМКЮР-ВД. Boron and cerium are introduced by calculation and chemical analysis are not determined. Mass fraction of residual elements and deviations in chemical composition - in accordance with GOST 5632.
    According to TU 14-1-223-72 in the alloy, the presence of antimony, tin, bismuth and arsenic is allowed for no more than 1 point of the spectral analysis scale. Boron and cerium are introduced into the metal by calculation and chemical analysis is not determined.

    Mechanical properties

    Section, mm σU, MPa d5, % y, % HB, MPa
    Bars hot rolled and forged and according to GOST 23705-79, THE 14-1-223-72. Annealing in air 1210-1230 °C (exposure 4 h) + Aging 925-975 °C (exposure 8 h), air cooling
    - - - 302-352
    ≥490 ≥4 ≥8 -

    Description mechanical marks

    Name Description
    σU Limit short-term strength
    d5 Elongation after rupture
    y The relative narrowing
    HB Brinell hardness number