Steel 45ХНМ (45ХНМА)

  • Steel 45KhNM (45KhNMA)
  • 4X2NMF steel
  • Steel 55X
  • Steel 60Kh2SMF
  • Steel 60CrNiG
  • 60KhN steel
  • 75XM steel
  • Steel 75KhSMF
  • 7X2SMF steel
  • Steel 90KhMF
  • Steel 9Х2МФ (9Х2МФА)

    • Designation

    Name The value
    Designation GOST Cyrillic 45ХНМ
    Designation GOST Latin 45XHM
    Transliteration 45HNM
    By chemical elements 45CrНMo
    Name The value
    Designation GOST Cyrillic 45ХНМА
    Designation GOST Latin 45XHMA
    Transliteration 45HNMA
    By chemical elements 45CrНMo

    Description

    45ХНМ steel is used: for the manufacture of a compound of the axes of the backup rolls of sheet mills for hot rolling of metals; gear shafts; hot rolled rings for car building; details of pipe fittings that are installed at hazardous production facilities.

    Note

    Steel hromonikelemolibdenovyh.

    Standards

    Name Code Standards
    Processing of metals by pressure. Forgings В03 GOST 8479-70, ST ЦКБА 010-2004
    Bars and shapes В32 TU 14-1-1220-75, TU 14-1-2982-80

    Chemical composition

    Standard C S P Mn Cr Si Ni Mo
    0.4-0.5 ≤0.04 ≤0.04 0.5-0.8 1.3-1.7 0.17-0.37 1.2-1.6 0.1-0.3
    Chemical composition is not verified by NTD. Total verified brands for chemical compounds: 2906 of 3316.

    Mechanical properties

    Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2 HB, MPa
    Forgings. Hardening + Vacation
    300-500 ≥440 ≥635 ≥13 ≥35 ≥490 197-235
    300-500 ≥490 ≥655 ≥12 ≥35 ≥490 212-248
    500-800 ≥540 ≥685 ≥10 ≥30 ≥390 223-262
    100-300 ≥590 ≥735 ≥13 ≥40 ≥490 235-277
    300-500 ≥590 ≥735 ≥12 ≥35 ≥440 235-277
    500-800 ≥590 ≥735 ≥10 ≥30 ≥390 235-277
    300-500 ≥685 ≥835 ≥11 ≥33 ≥390 262-311
    Forgings. Normalization
    100-300 ≥440 ≥635 ≥14 ≥40 ≥540 197-248
    100-300 ≥440 ≥635 ≥14 ≥40 ≥540 197-235
    500-800 ≥440 ≥635 ≥11 ≥30 ≥390 197-235
    100-300 ≥490 ≥655 ≥13 ≥40 ≥540 212-248
    Normalization at 860 °C, air cooling + Vacation at 600 °C, cooling with the furnace (named place of cutting out of samples)
    200 ≥950 ≥1050 ≥12 ≥35 - 302
    200 900-970 1010-1100 6-14 12-47 - 302-321
    200 ≥920 ≥1040 ≥6 ≥10 - 302-341
    Forgings. Quenching in oil with 840-870 °C + Vacation at 580-650 °C, cooling with the furnace (named place of cutting out of samples)
    800-1200 ≥490 ≥640 ≥12 ≥28 ≥290 187-241

    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

    Technological properties

    Name The value
    Weldability Does not apply to welded structures.
    Склонность к отпускной хрупкости Malosolone.
    The temperature of forging Start - 1200 °C, the end - of 800 °C.
    Flock-sensitive sensitivity A highly sensitive.
    Machinability In the hardened and tempered condition when NV 97-269 and blower SB=690 MPa Kn TV.SPL.=0,9 Kn b.St.=0,7.