Steel 40KH9S2 (4Х9С2)

  • Steel 10Х11Н20Т2Р (ЭИ696А)
  • 10X23H10 steel
  • Steel 10Х23Н18 (0Х23Н18)
  • Steel 12Х25Н16Г7АР (ЭИ835)
  • Steel 20X23H18 (EI417)
  • Steel 40Х10С2М (ЭИ107)
  • Steel 40Х9С2 (4Х9С2)
  • Steel 45Х22Н4М3 (EP48)
  • Steel 55Kh20G9AN4 (EP303)

    • Designation

    Name The value
    Designation GOST Cyrillic 40Х9С2
    Designation GOST Latin 40X9C2
    Transliteration 40H9S2
    By chemical elements 40Cr9С2
    Name The value
    Designation GOST Cyrillic 4Х9С2
    Designation GOST Latin 4X9C2
    Transliteration 4H9S2
    By chemical elements 4Cr9С2

    Description

    40KH9S2 steel is used: for the manufacture of valves for the intake and exhaust of automobile, tractor and diesel engines, pipes, heat exchangers, heat exchanger, grate, and fasteners.

    Note

    Steel heat-resistant, heat-resistant martensitic class.
    Temperature intense scaling in air +850 °C.
    Stable in sulfur-containing environments.

    Standards

    Name Code Standards
    Sheets and strips В23 GOST 103-2006
    Bars and shapes В22 GOST 1133-71, GOST 2590-2006, GOST 2591-2006
    Sheets and strips В33 GOST 4405-75
    Classification, nomenclature and General rules В30 GOST 5632-72
    Bars and shapes В32 GOST 5949-75, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-1-3795-84, 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 0.35-0.45 ≤0.025 ≤0.03 ≤0.8 8-10 2-3 ≤0.6 Rest ≤0.3 ≤0.2 ≤0.2 ≤0.3 ≤0.2
    Fe is the basis.

    Mechanical properties

    Section, mm t отпуска, °C sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2
    Bars hot rolled and forged according to GOST 5949-75. Annealing at 850-870 °C, cooling in air or without heat treatment
    - ≥440 ≥740 ≥15 ≥35 -
    Rolled steel. Quenching in oil from 1050 °C + Vacation
    - 300 - ≥2150 ≥5 - ≥600
    A sample with a diameter of 10 mm and a length of 50 mm, laminated and annealed. The rate of deformation of 1.1 mm/min, strain rate of 0.0004 1/s
    - - - ≥135 ≥54 ≥95 -
    Long products, forgings. Quenching in oil from 900-1100 °C to + Vacation 500-540 °C, air cooling
    - ≥690 ≥880 ≥25 ≥59 ≥687
    Rolled steel. Quenching in oil from 1050 °C + Vacation
    - 400 - - ≥7 - ≥560
    A sample with a diameter of 10 mm and a length of 50 mm, laminated and annealed. The rate of deformation of 1.1 mm/min, strain rate of 0.0004 1/s
    - - - ≥51 ≥70 ≥98 -
    Rolled steel. Quenching in oil from 1050 °C + Vacation
    - 500 - ≥1470 ≥11 - ≥410
    A sample with a diameter of 10 mm and a length of 50 mm, laminated and annealed. The rate of deformation of 1.1 mm/min, strain rate of 0.0004 1/s
    - - - ≥59 ≥34 ≥59 -
    Rolled steel. Quenching in oil from 1050 °C + Vacation
    - 600 - ≥1420 ≥15 - ≥350
    A sample with a diameter of 10 mm and a length of 50 mm, laminated and annealed. The rate of deformation of 1.1 mm/min, strain rate of 0.0004 1/s
    - - - ≥45 ≥29 ≥45 -
    Rolled steel. Quenching in oil from 1050 °C + Vacation
    - 700 - ≥1280 ≥18 - ≥300
    A sample with a diameter of 10 mm and a length of 50 mm, laminated and annealed. The rate of deformation of 1.1 mm/min, strain rate of 0.0004 1/s
    - - - ≥23 ≥33 ≥42 -
    Rolled steel. Quenching in oil from 1050 °C + Vacation
    - 800 - ≥1200 ≥22 - ≥300
    A sample with a diameter of 10 mm and a length of 50 mm, laminated and annealed. The rate of deformation of 1.1 mm/min, strain rate of 0.0004 1/s
    - - - ≥16 ≥71 ≥74 -
    Rolled steel. Annealing at 850-870 °C, air cooling
    - - ≥640 ≥880 ≥20 ≥58 -
    - - ≥550 ≥820 ≥18 ≥64 -
    - - ≥520 ≥780 ≥18 ≥63 -
    - - ≥450 ≥780 ≥18 ≥62 -
    - - ≥410 ≥590 ≥17 ≥65 -
    - - ≥390 ≥520 ≥17 ≥80 -
    - - ≥170 ≥215 ≥18 ≥92 -
    - - ≥49 ≥78 ≥22 ≥99 -

    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 r, kg/m3 l, W/(m · °C) a, 10-6 1/°C
    0 7630 - -
    20 7630 - -
    100 7610 17 111
    200 7580 - 111
    400 7510 - 127
    600 7440 22 143
    800 7390 22 142
    300 - 20 -
    1000 - - 14

    A description of the physical symbols

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

    Technological properties

    Name The value
    Weldability Does not apply to welded structures.
    Склонность к отпускной хрупкости Inclined.
    The temperature of forging Start - 1200 °C, the end - 850 °C. the cross Sections up to 350 mm cooled in the furnace.
    Flock-sensitive sensitivity not sensitive.