Steel St2kp (ВСт2кп)

Designation

Name The value
Designation GOST Cyrillic Ст2кп
Designation GOST Latin Ct2kp
Transliteration St2kp
By chemical elements 2
Name The value
Designation GOST Cyrillic ВСт2кп
Designation GOST Latin BCt2kp
Transliteration VSt2kp
By chemical elements 2

Description

St2kp steel is used: for the manufacture of non-critical parts requiring high ductility or deep drawing; malonarushennye elements of welded structures operating at constant loads and with positive temperatures; electric-welded pipes for the manufacture of parts and structures in motovelotehnika; pipes for shipbuilding; hot-rolled steel sheets with one-sided rhombic and lenticular corrugated; two-headed rails, t-type P5, is designed for ground and suspended tracks.

Note

The degree of deoxidation — KP.

Standards

Name Code Standards
Tape В34 GOST 19851-74
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 8696-74, GOST 10704-91, GOST 10705-80, GOST 10706-76, GOST 10707-80, GOST 12132-66, GOST 13663-86, GOST 13664-68, OST 5.6065-74, OST 5.9162-73, TU 14-3-1160-83, TU 14-3-1428-86, TU 14-3Р-56-2001, TU 1373-022-05757850-08, TU 1373-013-02949352-2003
Low carbon steel wire В71 GOST 3282-74
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 10551-75, GOST 11474-76, GOST 19240-73, GOST 19425-74, GOST 19771-93, GOST 19772-93, GOST 30565-98, GOST 535-2005, GOST 30136-95, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006, OST 5.9086-85, OST 5.9087-84, TU 14-2-341-78, TU 14-1-5283-94
Sheets and strips В23 GOST 82-70, GOST 8568-77, GOST 14637-89, GOST 14918-80, GOST 16523-97, GOST 19903-74, GOST 16523-89, GOST 16523-70, GOST 103-2006, GOST 19903-90, TU 14-1-521-73, STP М324-90
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 14-11-245-88, TU 14-136-367-2008

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu N As
GOST 380-2005 0.09-0.15 ≤0.05 ≤0.04 0.25-0.5 ≤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
- ≥206 ≥333 ≥24 -
Pipe electric-welded profile in the delivery state according to GOST 13663-86 (samples)
- - ≥353 ≥10 -
- ≥206 ≥333 ≥24 -
Hot-rolled sheet in the delivery condition. Group strength ОК300В
≤2 ≥215 300-480 - ≥21
2-3.9 ≥215 300-480 - ≥23
Cold-rolled sheet in the delivery condition. Group strength ОК300В
≤2 ≥215 300-480 - ≥24
2-3.9 ≥215 300-480 - ≥26
The hot rolled plate, long products and fittings as supplied
≤20 ≥215 325-410 ≥33 -
20-40 ≥205 325-410 ≥32 -
40-100 ≥195 325-410 ≥30 -
100 ≥185 325-410 ≥30 -

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 without restriction; welding methods: SMAW, ADS submerged arc and gas protection electroslag welding, the CCC. For thickness of more than 36 mm recommended heating and subsequent heat treatment.
Склонность к отпускной хрупкости tend not
The temperature of forging Beginning - 1300 °C, the end - 750 °C. air Cooling.
Flock-sensitive sensitivity not sensitive
Machinability In the hot rolled condition with a HB of 137 Kn TV.SPL.=2.0 Kn b.St.=1.6