Steel 25Х1М1ФА (Р2МА; 25KH1M1F)

  • Steel 20Х1М1Ф1БР (EP44)
  • Steel 25Х1М1ФА (Р2МА; 25Х1М1Ф)

    • Designation

    Name The value
    Designation GOST Cyrillic 25Х1М1ФА
    Designation GOST Latin 25X1M1FA
    Transliteration 25H1M1FA
    By chemical elements 25Cr1Mo1V
    Name The value
    Designation GOST Cyrillic Р2МА
    Designation GOST Latin P2MA
    Transliteration R2MA
    By chemical elements -
    Name The value
    Designation GOST Cyrillic 25Х1М1Ф
    Designation GOST Latin 25X1M1F
    Transliteration 25H1M1F
    By chemical elements 25Cr1Mo1V

    Description

    25Х1М1ФА steel is used: for the manufacture of billets of shafts and one-piece rotors stationary and transport steam turbines, wheels and other parts operating at temperatures up to 540 °C.

    Standards

    Name Code Standards
    Processing of metals by pressure. Forgings В03 TU 108-1029-81, ST ЦКБА 010-2004

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu V Mo
    TU 108-1029-81 0.21-0.29 ≤0.022 ≤0.025 0.3-0.6 1.5-1.8 ≤0.37 ≤0.4 Rest ≤0.25 0.22-0.32 0.9-1.05
    Fe is the basis.
    According to TU 108-1029-81, the chemical composition is given for steel grade 25H1M1FA (P2MA). In the workpieces, deviations in the content of the elements indicated in the table are allowed: carbon ± 0.010%, silicon + 0.030%. For metal VDP, the deviation of manganese content +0.10% / - 0.15% is allowed. The deviation of the silicon content in the metal VDP and ESR is allowed within ± 0.050%. In the ESR steel, the sulfur content should not be more than 0.015%. The total content of sulfur and phosphorus should not be more than 0.040%.

    Mechanical properties

    sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2
    Billet shafts and rotors of steam turbines on the other 108-1029-81 (in the delivery condition specified strength and direction and place the cuttings sample)
    490-667 ≥618 ≥16 ≥40 ≥390
    490-667 ≥618 ≥13 ≥35 ≥390

    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) R, Mr. · m a, 10-6 1/°C
    20 216 7820 - 233 -
    100 214 7800 406 283 109
    200 210 7770 398 349 12
    300 205 7740 39 428 127
    400 197 7700 377 519 1365
    500 186 7670 36 633 1372
    600 171 7640 339 746 1382
    700 - 7600 31 862 14

    A description of the physical symbols

    Name Description
    r Density
    l Coefficient of thermal conductivity
    R UD. the resistivity