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%.
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 |
| 20 | 198 |
| 100 | 183 |
| 200 | 175 |
| 300 | 167 |
| 400 | 158 |
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. |
| The tendency to temper brittleness | Tend not. |
| The temperature of forging | Beginning - 1300 °C, the end - 750 °C. air Cooling. |
| Flock-sensitive sensitivity | not sensitive. |
