St4kp / VSt4kp (ВСт4кп) Structural Steel

  • 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 Ст4кп
    Designation GOST Latin Ct4kp
    Transliteration St4kp
    By chemical elements 4
    Name The value
    Designation GOST Cyrillic ВСт4кп
    Designation GOST Latin BCt4kp
    Transliteration VSt4kp
    By chemical elements 4

    Description

    St4kp / VSt4kp structural steel

    St4kp, also written VSt4kp or ВСт4кп, is a rimmed carbon structural-steel designation. It is used for rolled angles, channels and other sections, welded, riveted or bolted structures, general engineering parts, tube and pipe, and selected rail-related products under the applicable specification.

    Designation and condition

    The “kp” suffix identifies the rimmed or low-deoxidation condition. Chemical composition, mechanical properties, deoxidation practice, dimensions and delivery condition must be checked against the governing GOST or customer specification. Similar-looking designations should not be assumed to be interchangeable.

    Ordering details

    State the exact designation, standard, product form, dimensions, condition, tolerances, quantity and inspection documents. Related existing pages cover special-purpose steels and special-steel forgings.

    Request a U.S. quote

    Evek LLC serves customers throughout the United States. Typical delivery is 2–3 weeks, subject to specification and availability.

    Contact Evek LLC with the required standard, dimensions, quantity and delivery ZIP code.

    Standards

    Name Code Standards
    Sheets and strips В23 GOST 14918-80, GOST 16523-97, GOST 16523-89, GOST 16523-70, GOST 103-2006
    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 10704-91, GOST 10705-80, GOST 10707-80, GOST 13663-86, GOST 13664-68, TU 14-3-1160-83, TU 14-3-1428-86, TU 1373-013-02949352-2003
    Rails. Lining. Lining. Crutches В42 GOST 3280-84, GOST 5812-82, GOST 7056-77, 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
    Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-4944-90
    Processing of metals by pressure. Forgings В03 OST 5Р.9125-84
    Sheets and strips В33 TU 14-1-3579-83, TU 14-1-4431-88
    Bars and shapes В32 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 ≤0.05 ≤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, % d4
    Longitudinal electric-welded pipes (Dy=10-530 mm) in the delivery condition. Listed marsvolta base metal
    - ≥245 ≥412 ≥21 -
    Pipe electric-welded profile in the delivery state according to GOST 13663-86 (samples)
    - - ≥372 ≥10 -
    - ≥245 ≥412 ≥21 -
    The hot rolled shapes in the state of delivery
    ≤20 ≥255 400-510 ≥25 -
    20-40 ≥245 400-510 ≥24 -
    40-100 ≥235 400-510 ≥22 -
    100 ≥225 400-510 ≥22 -
    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

    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

    Technological properties

    Name The value
    Weldability Welded is limited.
    Склонность к отпускной хрупкости tend not
    The temperature of forging Start - 1200 °C, the end - 850 °C.
    Flock-sensitive sensitivity not sensitive
    Machinability Under HB 152 Kn TV.SPL.=1.7 Kn b.St.=1.7