Steel 20Х23Н13 (ЭИ319)

  • 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 20Х23Н13
    Designation GOST Latin 20X23H13
    Transliteration 20H23N13
    By chemical elements 20Cr23Н13
    Name The value
    Designation GOST Cyrillic ЭИ319
    Designation GOST Latin EI319
    Transliteration EhI319
    By chemical elements -

    Description

    20Х23Н13 steel is used: for the manufacture of parts operating at high temperatures in lightly; pipes for pyrolysis of methane and pyrometric pipes.

    Note

    Steel heat-resistant autentico-ferritic class.
    The recommended maximum operating temperature for a long time +1000 °C. the Temperature of intensive scaling in air +1050 °C.
    In the temperature range 600−800 °C is prone to embrittlement due to the formation of σ-phase.

    Standards

    Name Code Standards
    Bars and shapes В22 GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
    Sheets and strips В23 GOST 19903-74, GOST 19904-90, GOST 103-2006, GOST 19903-90
    Sheets and strips В33 GOST 4405-75, GOST 5582-75, GOST 7350-77
    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 14-11-245-88
    Blanks. Of the workpiece. Slabs В31 OST 3-1686-90
    Thermal and thermochemical treatment of metals В04 STP 26.260.484-2004
    Processing of metals by pressure. Forgings В03 TU 14-1-1530-75
    Castings with special properties (iron and steel) В83 TU 14-1-956-74

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo W
    GOST 5632-72 ≤0.2 ≤0.025 ≤0.035 ≤2 22-25 ≤1 12-15 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, % KCU, kJ/m2
    Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Quenching in water or air from 1100-1150 °C
    - ≥540 ≥35 - -
    Rolled steel. Quenching in water from 1050 °C
    - ≥360 ≥650 ≥39 ≥60 ≥206
    Hot rolled sheet (4,0-25,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Quenching in water from 1030-1120 °C
    - ≥570 ≥35 - -
    Rolled steel. Quenching in water from 1050 °C
    - ≥300 ≥580 ≥28 ≥60 ≥294
    Bars hot rolled and forged according to GOST 5949-75. Quenching in air, oil or water from 1100-1150 °C
    ≥295 ≥490 ≥35 ≥50 -
    Rolled steel. Quenching in water from 1050 °C
    - ≥280 ≥520 ≥29 ≥64 ≥294
    Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water or air from 1100-1150 °C
    ≥300 ≥500 ≥35 ≥50 ≥588
    Rolled steel. Quenching in water from 1050 °C
    - ≥260 ≥465 ≥31 ≥62 ≥294
    - ≥215 ≥475 ≥35 ≥57 ≥294

    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 l, W/(m · °C) a, 10-6 1/°C С, J/(kg · °C)
    0 207 7820 - - -
    20 207 7820 - - -
    100 - 7890 - 149 538
    600 - 7580 24 178 -
    800 - 7480 29 - -
    200 - - 17 157 -
    300 - - 19 166 538
    400 - - 21 171 -
    500 - - 23 175 -
    700 - - 27 178 -
    900 - - 31 182 -

    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
    Weldability limited weldability. Welding methods: SMAW, electrodes OzL-6, CL-25.
    Склонность к отпускной хрупкости inclined in the range of 600-800 °C due to the formation of b-phase
    The temperature of forging Beginning - 1220 °C, the end of - 900 °C. the cross Sections up to 350 mm cooled in air.
    Features of heat treatment Steel products to eliminate the tendency to intergranular corrosion are subjected to hardening regime: heating up to 1100-1150 °C, exposure during heating for quenching for products with wall thickness up to 10 mm - 30 min, over 10 mm — 20 min + 1 min per 1 mm max thickness cooling in water or air. Products austenite-ferritic steels do not require heat treatment after welding.