Steel 4

  • A4 steel
  • Steel 76F
  • 76KhSF steel
  • Steel 76C (M76C)
  • 78KhSF steel
  • Steel 90AF (E90AF)
  • Steel A1 (A0)
  • A2 steel
  • A3 steel
  • Steel 76VT (M76VT)
  • Steel wheel 1
  • Steel wheel 2
  • Steel wheel 3
  • Steel M75
  • Steel H50
  • OS Steel
  • PT70 steel
  • T60 steel
  • Steel 70 (M70)
  • Steel 2
  • Steel 3
  • 3Gps steel
  • Steel 4
  • Steel 54 (M54)
  • 5Gps steel
  • Steel 63 (K63)
  • Steel 68 (M68)
  • 76T steel
  • Steel 73B (M73B)
  • Steel 73T (M73T)
  • Steel 73C (M73C)
  • Steel 74 (M74)
  • Steel 74T (M74T)
  • Steel 74C (M74C)
  • Steel 76 (M76)
  • Steel 76B (M76B)

    • Designation

    Name The value
    Designation GOST Cyrillic 4
    Designation GOST Latin 4
    Transliteration 4
    By chemical elements 4

    Description

    The steel 4 is used: for the manufacture of rough locomotive tires increased hardness and operational stability for freight and shunting locomotives; solid-rolled rings for different purposes.

    Note

    Steel bandage.

    Standards

    Name Code Standards
    Bandages. Wheels. Axis В41 GOST 398-2010, TU 0941-096-01124323-2007
    Bars and shapes В32 OST 1 92049-76

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu V Mo
    TU 0941-096-01124323-2007 0.65-0.75 ≤0.02 ≤0.03 0.6-0.9 0.2-0.6 0.22-0.45 - Rest - ≤0.03 -
    GOST 398-2010 0.65-0.75 ≤0.02 ≤0.03 0.6-0.9 0.2-0.6 0.22-0.45 ≤0.25 Rest ≤0.3 ≤0.15 ≤0.08
    Fe is the basis.
    According to TU 0941-096-01124323-2007 the mass fraction of oxygen should not exceed 40 ppm. The mass fraction of hydrogen in liquid steel before casting should not exceed 0.0002% (2.0 ppm).
    According to GOST 398-2010 the total share of sulfur and phosphorus in steel should not exceed 0.040%. The total content of chromium and nickel in the steel should be at least 0.30%. In the bandages, the maximum deviations in the chemical composition are permissible: carbon + 0.030 / -0.020, manganese + 0.050 / -0.030, silicon + 0.030 / -0.020, chromium +0.020, vanadium + 0.010%, phosphorus +0.0050% , in the sulfur +0.0050%. The mass fraction of hydrogen in liquid steel should not exceed 0.00020%.

    Mechanical properties

    Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2 HB, MPa
    Bandages according to GOST 398-2010. Quenching with a separate heating + Vacation
    - ≥1050 ≥9 ≥12 ≥1960 320-380
    Ring forged in OST 1 92049-76. Quenching in warm water (30-60 °C) with 890-920 °C (speed of 2.0-2.5 hours) + Vacation at 580-620 °C (exposure for 2.5-3.0 h), cooling in water
    25 ≥660 ≥835 ≥10.5 - ≥882 -
    Heat hardened bandages in the state of delivery on the other 0941-096-01124323-2007 (NV bandages at a depth of 20 mm)
    - 1050-1270 ≥9 ≥12 ≥2000 320-360

    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