Steel St2sp (ВСт2сп)

Designation

Name The value
Designation GOST Cyrillic Ст2сп
Designation GOST Latin Ct2cp
Transliteration St2sp
By chemical elements 2
Name The value
Designation GOST Cyrillic ВСт2сп
Designation GOST Latin BCt2cp
Transliteration VSt2sp
By chemical elements 2

Description

Steel St2sp 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; two-headed rails, t-type P5, is designed for ground and suspended tracks.

Note

The degree of deoxidation — SP.

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 8732-78, GOST 9567-75, GOST 10704-91, GOST 10705-80, GOST 10706-76, GOST 10707-80, GOST 12132-66, GOST 13663-86, GOST 20295-85, GOST 24950-81, GOST 8731-87, GOST 13664-68, GOST Р 53383-2009, OST 5.6065-74, OST 5.9162-73, TU 14-3-1160-83, TU 14-3-1428-86, TU 14-3-1473-87, TU 14-3Р-50-2001, TU 14-3Р-56-2001, TU 1373-022-05757850-08, TU 14-3-1654-89, 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 11474-76, GOST 19240-73, GOST 19425-74, 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
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
Test methods. Packing. Marking В29 TU 14-106-485-99
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 0.09-0.15 ≤0.05 ≤0.04 0.25-0.5 ≤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, % d4 y, %
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 ≥13 - -
- ≥206 ≥333 ≥24 - -
Long products
- ≥230 ≥395 ≥33 - ≥69
- ≥210 ≥370 - - -
- ≥145 - - - -
- ≥125 ≥350 - - ≥71
- ≥105 ≥210 - - ≥75
- ≥55 ≥140 ≥42 - ≥87
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 ≥225 335-430 ≥32 - -
20-40 ≥215 335-430 ≥31 - -
40-100 ≥205 335-430 ≥29 - -
100 ≥195 335-430 ≥29 - -
Seamless hot deformed tubes in the delivery condition
≥215 ≥343 ≥24 - -

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

Physical characteristics

Temperature Е, HPa
0 198
100 183

A description of the physical symbols

Name Description
Е The normal elasticity modulus
r Density
l Coefficient of thermal conductivity
R UD. the resistivity
a The coefficient of linear expansion

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.