Steel 15KH28 (ЭИ349)

  • Steel 10Х15Н27Т3МР (EP700)
  • Steel 08Cr17T (EI645)
  • Steel 08Cr18Ni10 (EI119)
  • Steel 08Cr18Ni10T (EI914)
  • Steel 08X18T1 (0X18T1)
  • Steel 08Х20Н14С2 (ЭИ732)
  • Steel 09Cr18Ni10T (1Cr18Ni10T)
  • Steel 10Х13Г18Д (DI-61; 12Х13Г18Д)
  • Steel 06X18H10T (06X18H10)
  • Steel 12X17 (X17)
  • Steel 12Х20Н14С2 (ЭИ732)
  • Steel 13Х13С2М2 (ЭИ852)
  • Steel 15X25T (EI439)
  • Steel 15X28 (EI349)
  • Steel 20Х20Н14С2 (ЭИ211)
  • 4X18H2M steel (EP378)
  • Steel 06X20H14C2
  • Steel 06Х18Г9Н5АБ (06Х18Г5Н5АБ; ЧС51)
  • Steel 06Х16Н2К5ФМБ (EP875; VNS-26)
  • 05Cr18Ni10T (0Cr18Ni10T) steel
  • Steel 03X20Yu3NTB (KO-4)
  • Steel 03Cr18Ni10T (03Cr18Ni10T; Cr18Ni10T)
  • Steel 03Х17Н8Г5МФАБ (VNS-31)
  • Steel 03Х11Н8М2Ф (DI52)
  • Steel 01Х25ТБЮ (ChS76; 01Х25ТБ)
  • Steel 01X25T (ChS75)
  • Steel 01X25M2T (ChS78)
  • Steel 01X13MBSch (EP933)
  • Steel 01X18T (ChS74)
  • Steel 01X18M2T (ChS77)
  • Steel 01X18 (ChS86)
  • Steel 015Cr18M2B (EP882)

    • Designation

    Name The value
    Designation GOST Cyrillic 15Х28
    Designation GOST Latin 15X28
    Transliteration 15H28
    By chemical elements 15Cr28
    Name The value
    Designation GOST Cyrillic ЭИ349
    Designation GOST Latin EI349
    Transliteration EhI349
    By chemical elements -

    Description

    15KH28 steel is used: for the manufacture of welded structures (as a substitute of steel 12KH18N10T), not exposed to shock loads when the operating temperature is not below -20 °C and for operation in more corrosive environments than steel 08KH17T; details of vacuum equipment; pipes of heat-exchange equipment operating in aggressive environments; the junctions with glass; equipment, parts, pipes pyrolysis plants, heat exchangers, pipes heat-exchange equipment operating in aggressive environments.

    Note

    Steel heat-resistant and corrosion-resistant ferritic class.
    Temperature intense scaling in air 1100−1150 °C.

    Standards

    Name Code Standards
    Sheets and strips В23 GOST 103-2006
    Bars and shapes В22 GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
    Sheets and strips В33 GOST 4405-75, GOST 5582-75
    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, GOST 18907-73, TU 3-746-83, TU 14-1-1625-76, TU 14-1-1729-76, TU 14-1-4135-86, TU 14-11-245-88
    Steel pipes and fittings to them В62 GOST 9940-81, TU 14-3-1654-89
    Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-565-84
    Thermal and thermochemical treatment of metals В04 STP 26.260.484-2004
    Tape В34 TU 14-1-2275-77, TU 14-1-2289-84
    Wire, steel, alloy В73 TU 14-1-4611-89

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo W
    GOST 5632-72 ≤0.15 ≤0.025 ≤0.035 ≤0.8 27-30 ≤1 ≤1 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, %
    Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Annealing or vacation at 740-780 °C
    - - ≥530 ≥17 -
    Rolled steel. Annealing at 760-780 °C
    - - ≥530 ≥30 -
    Bars hot rolled and forged according to GOST 5949-75. Annealing at 680-720 °C, cooling in air or in water or without heat treatment
    ≥295 ≥440 ≥20 ≥45
    Rolled steel. Annealing at 760-780 °C
    - - ≥11 ≥147 ≥100
    Bars hot rolled and forged at STP 26.260.484-2004. Annealing at 720-780 °C, cooling in water or air
    - ≥530 ≥30 -
    Rolled steel. Annealing at 760-780 °C
    - - ≥19 ≥153 ≥99
    Seamless hot deformed tubes in the delivery condition according to GOST 9940-81
    - ≥441 ≥17 -
    Rolled steel. Annealing at 760-780 °C
    - - ≥26 ≥104 ≥99
    - - ≥76 ≥48 ≥92
    - - ≥170 ≥60 -
    - - ≥390 ≥20 -
    - - ≥500 ≥18 -
    - - ≥460 ≥22 -
    - - ≥490 ≥29 -
    - - ≥490 ≥27 -
    - - ≥8 ≥139 ≥100

    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 G, HPa r, kg/m3 l, W/(m · °C) R, Mr. · m a, 10-6 1/°C
    0 220 89 7630 - 700 -
    20 200 - 7600 - - -
    100 216 86 - 21 - 10
    200 210 84 - 22 - 105
    300 204 80 - 23 - 105
    400 193 76 - 23 - -
    500 184 70 - 24 - 11
    600 165 62 - 25 - -
    700 - - - - - 11

    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. Used for welding manual arc welding electrodes type EA-2 and TIG. The welding is preferably carried out with heating to 150-300 °C.
    Склонность к отпускной хрупкости Tend when heated in the range of 520 °C due to excretion of the b-phase.
    The temperature of forging Start - 950-1000 °C, the end - of 750-800 °C. the Cooling is produced at the air.
    Features of heat treatment Welded steel products 15X28 should be subjected to annealing at 720-780 °C for 1-2 h, air cooling. Not allowed to leave the products at 450-550 °C, since this leads to the "475 ° embrittlement".
    Corrosion resistance Welded joints of steel 15KH28 prone to intergranular corrosion.