Steel St4sp (ВСт4сп)

  • 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 Ст4сп
    Designation GOST Latin Ct4cp
    Transliteration St4sp
    By chemical elements 4
    Name The value
    Designation GOST Cyrillic ВСт4сп
    Designation GOST Latin BCt4cp
    Transliteration VSt4sp
    By chemical elements 4

    Description

    Steel St4sp used: for the production of corner rolled steel, h-beam, channels, used in steel structures and construction; welded, riveted and bolted structures high strength; light duty parts; tube and pipe; two-headed rails, t-type P5, is designed for ground and suspended tracks; crutches accuracy class, designed for fastening of rails to wooden sleepers and joists; corner pads for fastening rails type R18 and R24.

    Note

    The degree of deoxidation — SP.

    Standards

    Name Code Standards
    Steel pipes and fittings to them В62 GOST 3262-75, GOST 8639-82, GOST 8642-68, GOST 8644-68, GOST 8645-68, GOST 8646-68, GOST 8732-78, GOST 9567-75, GOST 10704-91, GOST 10705-80, GOST 10707-80, GOST 13663-86, GOST 8731-87, GOST 13664-68, 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, TU 1373-013-02949352-2003
    Rails. Lining. Lining. Crutches В42 GOST 3280-84, GOST 5812-82, GOST 7056-77, GOST 8141-56, GOST 8142-89, GOST 8194-75, GOST 12135-75, GOST 16277-93, GOST 22343-90
    Tape В24 GOST 3560-73, GOST 6009-74, 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 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 8509-93, GOST 8510-86, GOST 9234-74, GOST 11474-76, 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, TU 14-2-341-78
    Sheets and strips В23 GOST 82-70, GOST 14637-89, GOST 14918-80, GOST 16523-97, GOST 16523-89, GOST 16523-70, GOST 103-2006
    Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-4944-90
    Sheets and strips В33 TU 14-1-3579-83, TU 14-1-4431-88
    Bars and shapes В32 TU 14-2-849-89, TU 14-11-245-88, TU 14-136-367-2008

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu N As
    GOST 380-2005 0.18-0.27 ≤0.05 ≤0.04 0.4-0.7 ≤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 t отпуска, °C sT|s0,2, MPa σU, MPa d5, % d4 y, % KCU, kJ/m2 HB, MPa
    Pipe electric-welded profile in the delivery state according to GOST 13663-86 (samples)
    - - - ≥372 ≥10 - - - -
    - - ≥245 ≥412 ≥21 - - - -
    The hot rolled plate, long products and fittings as supplied
    ≤20 - ≥265 410-530 ≥24 - - ≥880 -
    20-40 - ≥255 410-530 ≥23 - - ≥690 -
    40-100 - ≥245 410-530 ≥21 - - - -
    100 - ≥235 410-530 ≥21 - - - -
    Hot-rolled sheet in the delivery condition. Group strength ОК400В
    ≤2 - - 400-680 - ≥17 - - -
    2-3.9 - - 400-680 - ≥19 - - -
    Cold-rolled sheet in the delivery condition. Group strength ОК400В
    ≤2 - - 400-680 - ≥19 - - -
    2-3.9 - - 400-680 - ≥21 - - -
    Forgings. Annealing in air from 850 °C + Vacation at 570 °C
    300-500 - ≥315 ≥570 ≥12 - ≥30 ≥290 167-207
    Long products (wire). Quenching in oil from 850 °C + Vacation at 570 °C , cooling in water or oil
    ≤25 - ≥685 ≥780 ≥12 - ≥45 ≥980 -
    Longitudinal electric-welded pipes (Dy=10-530 mm), seamless hot deformed tubes in the delivery condition
    - ≥245 ≥412 ≥20 - - - -
    Quenching using water in oil from 850 °C + Vacation at 560 °C (exposure for 10 h), cooling in water
    550 - - ≥930 - - - - -
    550 - - ≥870 - - - - -
    550 - - ≥730 - - - - -
    Quenching in oil from 850 °C + vacation
    - 200 ≥1580 ≥1780 ≥15 - ≥36 - ≥499
    - 300 ≥1470 ≥1670 ≥16 - ≥40 - ≥478
    - 400 ≥1290 ≥1370 ≥16 - ≥41 - ≥415
    - 500 ≥1150 ≥1200 ≥16 - ≥46 - ≥350
    - 600 ≥950 ≥1040 ≥19 - ≥54 - ≥269
    A sample with diameter 10 mm, length 50 mm, forged
    - - ≥185 ≥200 ≥34 - ≥93 - -
    - - ≥89 ≥135 ≥57 - ≥98 - -
    - - ≥52 ≥76 ≥68 - ≥100 - -
    - - ≥27 ≥50 ≥75 - ≥100 - -
    - - ≥18 ≥35 ≥66 - ≥100 - -
    - - ≥10 ≥20 ≥66 - ≥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
    d4 Elongation after rupture
    y The relative narrowing
    KCU Toughness
    HB Brinell hardness number