Steel 36KH18N25S2 (4Х18Н25С2)

  • Steel 10Х13СУ (ЭИ404)
  • Steel 15Kh18SU (EI484)
  • Steel 15Kh6Su (EI428)
  • Steel 20X23H13 (EI319)
  • Steel 20Х25Н20С2 (ЭИ283)
  • Steel 30Х13Н7С2 (ЭИ72)
  • Steel 36Х18Н25С2 (4Х18Н25С2)

    • Designation

    Name The value
    Designation GOST Cyrillic 36Х18Н25С2
    Designation GOST Latin 36X18H25C2
    Transliteration 36H18N25S2
    By chemical elements 36Cr18Н25С2
    Name The value
    Designation GOST Cyrillic 4Х18Н25С2
    Designation GOST Latin 4X18H25C2
    Transliteration 4H18N25S2
    By chemical elements 4Cr18Н25С2

    Description

    36KH18N25S2 steel is used: for the manufacture of nozzle heads, parts, ovens, carburizing boxes, continuously operating at temperatures up to +1000 °C.

    Note

    Steel heat-resistant austenitic class.
    The recommended maximum operating temperature for a long time +1000 °C. the Temperature of intensive scaling in air +1100 °C.
    The steel is resistant to carburizing environments.

    Standards

    Name Code Standards
    Classification, nomenclature and General rules В30 GOST 5632-72
    Bars and shapes В32 GOST 5949-75, TU 14-11-245-88
    Blanks. Of the workpiece. Slabs В31 OST 3-1686-90

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo W
    GOST 5632-72 0.32-0.4 ≤0.02 ≤0.035 ≤1.5 17-19 2-3 23-26 Rest ≤0.3 ≤0.2 ≤0.2 ≤0.3 ≤0.2
    Fe is the basis.

    Mechanical properties

    Section, mm sT|s0,2, MPa σU, MPa d5, % y, %
    Bars hot rolled and forged according to GOST 5949-75. Quenching in air, oil or water from 1000-1150 °C
    ≥345 ≥640 ≥25 ≥40

    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
    20 200 7800 - -
    200 191 - - 134
    300 186 - - 147
    400 178 - - -
    500 171 - 228 161
    600 162 - 255 -
    700 154 - 263 -
    800 147 - 374 -
    100 - - 15 13

    A description of the physical symbols

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