Alloy Х20Н32Т (KHN32T; ЭП670)

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    • Designation

    Name The value
    Designation GOST Cyrillic Х20Н32Т
    Designation GOST Latin X20H32T
    Transliteration H20N32T
    By chemical elements Cr20Ni32Te
    Name The value
    Designation GOST Cyrillic ХН32Т
    Designation GOST Latin XH32T
    Transliteration HN32T
    By chemical elements CrNi32Te
    Name The value
    Designation GOST Cyrillic ЭП670
    Designation GOST Latin EP670
    Transliteration EhP670
    By chemical elements -

    Description

    Alloy Х20Н32Т used: for the production of HRP (5−20 mm); exhaust pipes; sheet metal parts of high temperature installations in petrochemical engineering for a long service at temperatures of +700−850 °C.

    Note

    High-temperature alloy, iron-Nickel basis.
    The recommended maximum operating temperature for a very long time +850 °C. the Temperature of beginning of intensive scaling in air to +1000 °C.

    Standards

    Name Code Standards
    Bars and shapes В22 GOST 1133-71, GOST 2590-2006
    Bars and shapes В32 GOST 14955-77, TU 14-1-284-72, TU 14-11-245-88
    Sheets and strips В33 GOST 24982-81, TU 14-1-625-73
    Processing of metals by pressure. Forgings В03 GOST 25054-81
    Classification, nomenclature and General rules В30 GOST 5632-72
    Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-2111-77
    Thermal and thermochemical treatment of metals В04 STP 26.260.484-2004
    Steel pipes and fittings to them В62 TU 14-3-489-76, TU 14-158-135-2003

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu Al Ti Mo
    TU 14-1-625-73 ≤0.05 ≤0.02 ≤0.03 ≤0.7 19-22 ≤0.7 30-34 Rest ≤0.3 ≤0.5 0.25-0.6 -
    GOST 5632-72 ≤0.05 ≤0.02 ≤0.03 ≤0.7 19-22 ≤0.7 30-34 Rest ≤0.3 ≤0.5 0.25-0.6 ≤0.3
    Fe is the basis.

    Mechanical properties

    Section, mm sT|s0,2, MPa σU, MPa d5, % y, %
    Steel cold-rolled sheet (0.8 to 3.9 mm) and HR (2.0 to 11.0 mm) in the delivery state according to GOST 24982-81. Quenching in water, under a water shower or air from 1100-1150 °C
    ≤3.9 ≥195 ≥470 ≥25 -
    4-11 ≥175 ≥490 ≥30 -
    Forgings. Annealing in air from 1100-1150 °C
    ≤100 ≥176 ≥470 ≥30 ≥35
    Bars hot rolled and forged 20-180 mm on THAT 14-1-284-72. Quenching in water or air from 1100-1150 °C
    ≥177 ≥470 ≥40 ≥60
    Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water or air from 1100-1150 °C
    ≥180 ≥490 ≥30 ≥35
    Heavy-gauge hot-rolled steel in the delivery state on the other 14-1-625-73. Quenching in water or air with 1080-1120 °C
    5-20 ≥178 ≥494 ≥30 -
    Cold-rolled tubes after austenization on delivery
    - ≥470 ≥35 -

    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

    Physical characteristics

    Temperature Е, HPa r, kg/m3 l, W/(m · °C) a, 10-6 1/°C
    20 205 8160 159 -
    100 - - 134 137
    200 - - 151 156
    300 - - 167 172
    400 - - 18 18
    500 - - 192 18
    600 - - 205 184
    700 - - 217 189
    800 - - 234 19

    A description of the physical symbols

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

    Technological properties

    Name The value
    Features of heat treatment Product details chemical engineering from KHN32T alloy should be quenched from 1100-1150 °C. Extract with a wall thickness of 15 mm - 30 min, more than 15 mm - 30 min + 1 min per 1 mm max thickness cooling in water or air.