Steel St6sp (ВСт6сп)

  • Steel St3kp (VSt3kp)
  • Steel St6sp (VSt6sp)
  • Steel St6ps (VSt6ps)
  • Steel St5sp
  • St5ps steel
  • St5Gps steel
  • Steel St4sp (VSt4sp)
  • Steel St4ps (VSt4ps)
  • Steel St4kp (VSt4kp)
  • Steel St3sp (VSt3sp)
  • Steel St3ps (VSt3ps)
  • Steel St3GSp (VSt3GSp)
  • Steel St3Gps (VSt3Gps)
  • Steel St2sp (VSt2sp)
  • Steel St2ps (VSt2ps)
  • Steel St2kp (VSt2kp)
  • Steel St1sp
  • St1ps steel
  • Steel St1kp
  • Steel St0

    • Designation

    Name The value
    Designation GOST Cyrillic Ст6сп
    Designation GOST Latin Ct6cp
    Transliteration St6sp
    By chemical elements 6
    Name The value
    Designation GOST Cyrillic ВСт6сп
    Designation GOST Latin BCt6cp
    Transliteration VSt6sp
    By chemical elements 6

    Description

    St6sp steel is used: for the manufacture of Bab hammers, spindles, wedges, construction scrap and other parts exposed to impact loads; parts of high strength (axles, shafts, fingers, pistons and other parts in heat treated condition); rod of rebar periodic profile, a trapezoidal profile for a bit and strip profile with thickening of agricultural machinery; two-headed rails, t-type P5, is designed for ground and suspended tracks.

    Note

    The degree of deoxidation — SP.

    Standards

    Name Code Standards
    Steel pipes and fittings to them В62 GOST 3262-75, GOST 8732-78, GOST 9567-75, GOST 8731-87, GOST Р 53383-2009, TU 14-3-1160-83, TU 14-3-1428-86, TU 14-3-1473-87, TU 14-3Р-50-2001, TU 14-3-1654-89
    Tape В24 GOST 3560-73, STP М309-74
    Classification, nomenclature and General rules В20 GOST 380-2005
    Bars and shapes В22 GOST 5422-73, GOST 5781-82, GOST 8239-89, GOST 8240-97, GOST 8509-93, GOST 8510-86, GOST 12492.3-90, GOST 12492.8-90, GOST 12492.10-90, GOST 19240-73, GOST 19425-74, GOST 535-2005, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006, OST 5.9086-85, OST 5.9087-84
    Sheets and strips В23 GOST 82-70, GOST 14918-80, GOST 19903-74, GOST 103-2006, GOST 19903-90
    Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-4944-90
    Sheets and strips В33 TU 14-1-4431-88
    Bars and shapes В32 TU 14-2-849-89, TU 14-11-245-88, TU 14-1-1271-75, TU 14-136-367-2008

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu N As
    GOST 380-2005 0.38-0.49 ≤0.05 ≤0.04 0.5-0.8 ≤0.3 0.15-0.3 ≤0.3 Rest ≤0.3 ≤0.012 ≤0.08
    Fe is the basis.
    The nitrogen content is indicated for steel smelted in electric furnaces. In open-hearth and converter steels, the content of N≤0.010%.

    Mechanical properties

    Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2
    Long products
    - ≥325 ≥535 ≥25 ≥52 -
    - ≥305 ≥505 ≥20 ≥53 -
    - ≥305 - - ≥39 -
    - ≥200 - ≥21 ≥51 -
    - ≥180 ≥500 ≥23 ≥64 -
    - ≥150 ≥355 ≥24 ≥70 -
    - ≥81 ≥190 ≥35 ≥83 -
    Rolled steel in the delivery state
    ≤25 ≥325 ≥535 ≥25 ≥52 ≥630
    The hot rolled shapes in the state of delivery
    20-40 ≥305 ≥590 ≥14 - -
    20 ≥315 ≥590 ≥15 - -
    40 ≥295 ≥590 ≥12 - -
    Seamless hot deformed tubes in the delivery condition
    ≥305 ≥590 ≥14 - -
    Normalization at 840-880 °C, air cooling to 450-500 °C + High tempering at 620-650 °C
    300 - ≥640 ≥23 ≥42 -
    Forgings. Quenching in water from 840-860 °C + Vacation at 600-640 °C
    220 390-530 670-810 18-23 50-57 390-640
    Forgings. Quenching in oil 840-860 °C + Vacation at 580-620 °C
    220 390-530 700-850 17-24 46-54 340-540
    Forgings. Isothermal annealing at 830-860 °C + Isothermal holding at 630-660 °C
    400 - ≥640 ≥22 ≥42 -
    Forgings. Annealing at 830-860 °C
    400 - ≥670 ≥19 ≥36 -
    A sample with a diameter of 10 and a length of 100 mm laminated. The rate of deformation of 120 mm/min and strain Rate of 0.02 1/s
    - - ≥165 ≥33 ≥94 -
    - - ≥105 ≥62 ≥95 -
    - - ≥75 ≥50 ≥93 -
    A sample with a diameter of 10 and a length of 50 mm laminated. The strain rate of 120 mm/min strain Rate of 0.04 1/s
    - - ≥55 ≥92 ≥100 -
    - - ≥37 ≥100 ≥100 -
    - - ≥27 ≥106 ≥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
    KCU Toughness

    Physical characteristics

    Temperature Е, HPa G, HPa
    200 186 77

    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; welding methods: SMAW, ADS submerged arc and gas protection electroslag welding. Recommended heating and subsequent heat treatment. The CCC without restriction.
    Склонность к отпускной хрупкости Tend not.
    The temperature of forging Start - 1250 °C, the end - 780 °C. the cross Sections up to 400 mm are cooled in air.
    Flock-sensitive sensitivity not sensitive.
    Machinability In hot-rolled state when HB 158 and blower SB=640 MPa Kn TV.SPL.=1,2 Kn b.St.=1,2.