Alloy ХН35КВТ (ЭИ612К)

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    • Designation

    Name The value
    Designation GOST Cyrillic ХН35КВТ
    Designation GOST Latin XH35KBT
    Transliteration HN35KVT
    By chemical elements CrNi35CoВTe
    Name The value
    Designation GOST Cyrillic ЭИ612К
    Designation GOST Latin EI612K
    Transliteration EhI612K
    By chemical elements -

    Description

    Alloy ХН35КВТ used: for the manufacture of gas turbine blades, disks, rotors, fasteners, flat springs and other parts operating at temperatures up to +650 °C.

    Note

    High-temperature alloy on Nickel-iron basis.
    The recommended maximum operating temperature for a very long time +650 °C.
    The temperature of beginning of intensive scaling in air +850−900 °C.

    Standards

    Name Code Standards
    Classification, nomenclature and General rules В30 GOST 5632-72
    Blanks. Of the workpiece. Slabs В31 OST 3-1686-90
    Bars and shapes В32 TU 14-1-272-72, TU 14-11-245-88

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu Al B Ti Mo W Co
    GOST 5632-72 ≤0.1 ≤0.02 ≤0.02 1-2 14-16 ≤0.5 34-38 Rest ≤0.3 ≤0.5 ≤0.01 1.2-1.6 ≤0.3 2.8-3.5 3.5-4.5
    TU 14-1-272-72 ≤0.1 ≤0.02 ≤0.02 1-2 14-16 ≤0.5 34-38 Rest - ≤0.5 ≤0.01 1.2-1.6 - 2.8-3.5 3.5-4.5
    Fe is the basis.

    Mechanical properties

    Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2
    Bars and shapes. Austenization heating up to 1080-1100 °C (aging of 1.0-1.5 h), cooling in water + Aging at 690-710 °C (extract 25-50 hours), air cooling
    25 ≥345 ≥590 ≥15 ≥35 ≥686

    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

    Physical characteristics

    Temperature Е, HPa r, kg/m3
    20 200 8200

    A description of the physical symbols

    Name Description
    Е The normal elasticity modulus
    r Density
    l Coefficient of thermal conductivity
    R UD. the resistivity