Steel 18KH3MV (ЭИ578)

  • Steel 15Kh5M (X5M)
  • 30Cr3MA steel
  • 30Kh3VA steel
  • Steel 25X5M
  • Steel 25Kh3MFA-A
  • Steel 25Kh3MFA (48TS-4)
  • Steel 25Kh2MFA (48TS-1)
  • Steel 25Kh2M1F (EI723)
  • Steel 25Х1МФ (ЭИ10)
  • Steel 20Х3МВФ (ЭИ415)
  • Steel 20Х1М1Ф1ТР (EP182)
  • Steel 18Kh3MV (EI578)
  • Steel 18Kh2MFA-A
  • Steel 18Kh2MFA (48TS-3)
  • 15CrM Steel
  • Steel 15X5VF (X5VF)
  • Steel 15X5 (X5)
  • Steel 15Kh2MFA-A
  • Steel 15Kh2MFA (48TS-3-40)
  • Steel 13X9M (X9M)
  • Steel 13Х3Н3М2ВФБ (VKS-10)
  • 12XM steel
  • Steel 12Kh8VF (1Kh8VF)
  • Steel 12X8 (1X8)
  • Steel 12Kh2MFA-A
  • Steel 12Х2МФА (48ТС-2)
  • Steel 12Kh1MF (12KhMF; 12KhMFA)
  • 12MX steel
  • Steel 08Х16Н9М2

    • Designation

    Name The value
    Designation GOST Cyrillic 18Х3МВ
    Designation GOST Latin 18X3MB
    Transliteration 18H3MV
    By chemical elements 18Cr3MoW
    Name The value
    Designation GOST Cyrillic ЭИ578
    Designation GOST Latin EI578
    Transliteration EhI578
    By chemical elements -

    Description

    18KH3MV steel is used: for the production of pipes hydrogenation facilities; details of pipes and valves with quenching in oil and tempering to the air; tubes for plants of chemical and petrochemical plants with nominal pressure PN=19.6−98 MPa (200−1000 kgf/cm2), operating at temperatures up to 450−500 °C.

    Note

    Steel pearlitic class.
    Temperature intense scaling +600 °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
    Sheets and strips В33 GOST 4405-75
    Bars and shapes В32 GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, GOST 20072-74, TU 14-11-245-88
    Processing of metals by pressure. Forgings В03 OST 26-01-135-81
    Thermal and thermochemical treatment of metals В04 ST ЦКБА 026-2005
    Steel pipes and fittings to them В62 TU 14-3Р-251-2007, TU 14-3-251-74, TU 14-3-463-2005

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo W
    TU 14-3-251-74 0.15-0.2 ≤0.025 ≤0.03 0.25-0.5 2.5-3 0.17-0.37 ≤0.3 Rest - 0.05-0.15 - 0.5-0.7 0.5-0.8
    GOST 20072-74 0.15-0.2 ≤0.025 ≤0.03 0.25-0.5 2.5-3 0.17-0.37 ≤0.3 Rest ≤0.2 0.05-0.15 ≤0.03 0.5-0.7 0.5-0.8
    Fe is the basis.
    According to GOST 20072-74, when steel is scrap-process, the content of Cu ≤ 0.30%. The presence of titanium is up to 0.030%. When smelting steel by the method of electroslag remelting, the mass fraction of sulfur should not be more than 0.015%.

    Mechanical properties

    Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2 HB, MPa
    Blank pieces of pipe fittings. Quenching in air or oil from 950-970 °C (exposure for 2.5-4.5 hours depending on the thickness and weight of the workpiece) + Vacation at 680-730 °C , air cooling
    ≤100 ≥440 ≥590 ≥15 ≥45 ≥588 197-235
    Bars of ≤60 mm. Quenching in oil from 950-970 °C + Vacation at 660-680 °C , air cooling
    15 ≥440 ≥640 ≥18 - ≥1180 -
    Seamless pipes for chemical and petrochemical industries in the state of delivery (indicate the cutting direction of sample)
    - ≥441 ≥637 ≥16 - ≥1078 197-241
    - ≥441 ≥637 ≥18 - ≥1180 197-241

    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
    HB Brinell hardness number