Steel St3sp (ВСт3сп)
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | Ст3сп |
| Designation GOST Latin | Ct3cp |
| Transliteration | St3sp |
| The chemical elements | 3 |
| Name | The value |
|---|---|
| Designation GOST Cyrillic | ВСт3сп |
| Designation GOST Latin | BCt3cp |
| Transliteration | VSt3sp |
| The chemical elements | 3 |
Description
Steel st3sp is used: for the manufacture of expanded metal sheets, load-bearing elements of welded and nesvorny structures and components operating at positive temperatures; shaped and flat rolled (5th category) for load-bearing elements of welded structures operating at variable loads: with plate thickness of up to 25 mm in the temperature range from -40 °C to +425 °C, at a thickness of 25 mm rolled over — from -20 °C to +425 °C under the condition of supply with guaranteed weldability; blanks parts of pipeline valves; forgings seniam to 300 mm. strength classes KP 175, KP 195; manufacture of welded transitions, flanges, welded tees and other fittings of pipelines, as with operating temperature of -20 °C to +200 °C; as a base layer in the manufacture of hot-rolled dual-layer corrosion-resistant sheets; hot rolled pan, odnoselchanka and C-shaped profiles for agricultural machinery; profile housing final drive of the tractor; hot rolled profiles for the production of rims for agricultural machines; electric-welded pipes for the manufacture of parts and structures in motovelotehnika; two-headed rails, t-type P5, designed for ground and suspended tracks; steel bent closed welded square and rectangular sections, intended for use in agricultural machinery, tractor and other sectors of the economy; hot-rolled steel sections sheet piling, designed for cellular structures and impervious curtain; crutches accuracy class, designed for fastening of rails to wooden sleepers and rails; solid-rolled rings for different purposes.
Note
The degree of deoxidation — SP.
Long products, flat and rolled sections made strength class with 265-section up to 20 mm When strengthening treatment (reglamentary or controlled rolling or accelerated cooling) comes rolled sections up to 20 mm strength classes 295, 325 and 345.
Steel st3sp provides strength grade sheet, universal broadband rental and roll-formed profiles KP 265 with plate thickness of up to 20 mm without the use of additional hardening treatment.
Standards
| Name | Code | Standards |
|---|---|---|
| Sheets and stripes | В33 | GOST 10885-85, TU 108.1273-84, TU 14-1-3579-83, TU 14-1-4912-90, TU 14-1-5032-91, TU 302.02.988-92, TU 14-1-5241-93, TU 14-1-4431-88 |
| Classification, nomenclature and general norms | В20 | GOST 19281-89, GOST 380-2005 |
| Tapes | В34 | GOST 19851-74 |
| Pipes steel and connecting parts to them | В62 | GOST 3262-75, GOST 8696-74, GOST 10704-91, GOST 10705-80, GOST 10706-76, GOST 10707-80, GOST 12132-66, GOST 20295-85, GOST 24950-81, HUNDRED 79814898 105-2008, TU 14-3-1160-83, TU 14-3-1428-86, TU 14-3-1473-87, TU 14-3-377-87, TU 1380-001-08620133-93, TU 1380-001-08620133-05, TU 14-3Р-56-2001, TU 1303-002-08620133-01, TU 1373-013-02949352-2003 |
| Tapes | В24 | GOST 3560-73, GOST 6009-74, STP М309-74 |
| Sectional and shaped rolling | В22 | GOST 4781-85, GOST 5267.0-90, 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 10884-94, GOST 11474-76, GOST 12492.1-90, GOST 12492.2-90, GOST 12492.4-90, GOST 12492.5-90, GOST 12492.13-90, GOST 12492.14-90, GOST 19240-73, GOST 19425-74, GOST 19771-93, GOST 19772-93, GOST 25577-83, GOST 26020-83, 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 14-2-949-91, TU 14-1-5282-94, HUNDRED АСЧМ 20-93, TU 14-1-5283-94, TU 14-105-568-93, TU 14-1-5254-94 |
| Rails. Lining. Lining. Crutches | В42 | GOST 5812-82, GOST 8142-89, GOST 16277-93 |
| Sheets and stripes | 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 36.26.11-5-89, TU 108-1126-82, TU 14-1-3023-80, TU 14-1-4632-93 |
| Metal forming. Forgings | В03 | GOST 8479-70, TU 108-11-908-87, ST ЦКБА 010-2004 |
| Sectional and shaped rolling | В32 | OST 1 92049-76, TU 14-105-454-86, TU 14-2-849-89, TU 14-11-245-88, TU 14-1-1271-75, TU 14-136-367-2008 |
| Bulls. Blanks. Slabs | В31 | OST 3-1686-90, TU 14-1-4944-90 |
| Welding and cutting of metals. Soldering, riveting | В05 | OST 36-58-81, OST 26-260.453-92 |
| Thermal and thermochemical treatment of metals | В04 | ST ЦКБА 026-2005 |
| Test methods. Packaging. Marking | В29 | TU 14-106-485-99 |
Mechanical characteristics
| Section, mm | sT|s0,2, MPa | σB, MPa | d5, % | d4 | y, % | kJ/m2, кДж/м2 | Brinell hardness number, MPa |
|---|---|---|---|---|---|---|---|
| Longitudinal electric-welded pipes (Dy=10-530 mm) in the delivery condition. Listed marsvolta base metal | |||||||
| ≥225 | ≥372 | ≥22 | - | - | - | - | |
| Ring forged in OST 1 92049-76. Normalization | |||||||
| 100 | ≥215 | ≥355 | ≥16 | - | - | - | - |
| Longitudinal electric-welded pipes TU 1303-002-08620133-01 in the delivery condition (in cross-section shows the thickness of the wall) | |||||||
| 20-25 | ≥235 | 370-480 | ≥25 | - | - | ≥290 | - |
| 6-20 | ≥245 | 370-480 | ≥26 | - | - | ≥290 | - |
| Forgings. Normalization | |||||||
| 100-300 | ≥175 | ≥355 | ≥24 | - | ≥50 | ≥590 | 101-143 |
| 100 | ≥175 | ≥355 | ≥28 | - | ≥55 | ≥640 | 101-143 |
| 100-300 | ≥195 | ≥390 | ≥23 | - | ≥50 | ≥540 | 111-156 |
| 100 | ≥195 | ≥390 | ≥26 | - | ≥55 | ≥590 | 111-156 |
| The hot rolled plate, long products and fittings as supplied | |||||||
| 10-20 | ≥245 | 370-480 | ≥26 | - | - | - | - |
| 20-40 | ≥235 | 370-480 | ≥25 | - | - | - | - |
| 40-100 | ≥225 | 370-480 | ≥23 | - | - | - | - |
| 10 | ≥245 | 380-490 | ≥26 | - | - | ≥1080 | - |
| 100 | ≥205 | 370-480 | ≥23 | - | - | - | - |
| Blank pieces of pipe fittings. Extract at 900-950 °C (2.5-4.0 hours depending on the thickness and weight of the workpiece) annealing in air | |||||||
| 300 | ≥195 | ≥390 | ≥23 | - | ≥50 | ≥540 | 111-156 |
| Hot-rolled sheet in the state of delivery (specified group strength) | |||||||
| ≤2 | ≥235 | 360-530 | - | ≥20 | - | - | - |
| 2-3.9 | ≥235 | 360-530 | - | ≥22 | - | - | - |
| ≤2 | ≥255 | 370-530 | - | ≥20 | - | - | - |
| 2-3.9 | ≥255 | 370-530 | - | ≥22 | - | - | - |
| Cold-rolled sheet in the state of delivery (specified group strength) | |||||||
| ≤2 | ≥235 | 360-530 | - | ≥22 | - | - | - |
| 2-3.9 | ≥235 | 360-530 | - | ≥24 | - | - | - |
| ≤2 | ≥255 | 370-530 | - | ≥22 | - | - | - |
| 2-3.9 | ≥255 | 370-530 | - | ≥24 | - | - | - |
| Rolled plates as supplied by TU 14-1-5241-93. Quenching + Tempering (samples transverse) | |||||||
| 20-40 | ≥235 | 370-480 | ≥25 | - | - | - | - |
| 40-50 | ≥225 | 370-480 | ≥23 | - | - | - | - |
| 8-20 | ≥245 | 370-480 | ≥26 | - | - | - | - |
| Bars and shapes of high-strength steel in the delivery state according to the GOST 19281-89 (specified strength class) | |||||||
| ≤20 | ≥265 | ≥430 | ≥21 | - | - | - | - |
| Hot rolled billet dimensions mm 140х120 | |||||||
| - | ≥220 | ≥445 | ≥33 | - | ≥59 | - | - |
| - | ≥205 | - | - | - | - | - | - |
| - | ≥180 | ≥285 | ≥34 | - | ≥80 | - | - |
| Sheet and structural steel in hot-rolled condition up to a thickness of 30 mm | |||||||
| - | 205-340 | 420-520 | 28-37 | - | 56-68 | - | - |
| - | 215-285 | - | - | - | - | - | - |
| - | 205-265 | - | - | - | - | - | - |
| - | 155-255 | 275-490 | 34-43 | - | 60-73 | - | - |
| - | 125-175 | 215-390 | 36-43 | - | 60-73 | - | - |
| A sample with a diameter of 6 mm, length 30 mm forged and normalized. Strain rate 16 mm/min, strain rate of 0.009 1/s | |||||||
| - | ≥73 | ≥100 | ≥57 | - | ≥96 | - | - |
| - | ≥51 | ≥63 | ≥95 | - | ≥95 | - | - |
| - | ≥38 | ≥65 | ≥84 | - | ≥100 | - | - |
| - | ≥25 | ≥43 | ≥79 | - | ≥100 | - | - |
| - | ≥19 | ≥31 | ≥80 | - | ≥100 | - | - |
| - | ≥14 | ≥25 | ≥84 | - | ≥100 | - | - |
Description mechanical marks
| Name | Description |
|---|---|
| Section | Section |
| sT|s0,2 | Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB | Limit short-term strength |
| d5 | Elongation after rupture |
| d4 | Elongation after rupture |
| y | The relative narrowing |
| kJ/m2 | Toughness |
Physical characteristics
| Temperature | Е, ГПа | l, Вт/(м · °С) |
|---|---|---|
| 20 | 194 | - |
| 100 | 192 | 55 |
| 200 | 187 | 54 |
| 300 | 183 | 50 |
| 400 | 178 | 45 |
| 500 | 167 | 39 |
| 600 | 159 | 34 |
| 700 | 146 | 30 |
| 800 | 120 | - |
| 900 | 99 | - |
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. For manual arc welding using electrodes MP-3 or УОНИ13/45A; for automatic submerged arc - welding wire SV-08A, SV-08ГА or SV-10G2 with flux an-348A; for welding in protective gases Ar and CO2 welding wire SV-08G2S. |
| Propensity to temper brittleness | Tend not. |
| Forging temperature | Beginning - 1300 °C, the end - 750 °C. air Cooling. |
| Flock-sensitive sensitivity | not sensitive. |
| Workability by cutting | In the hot rolled condition when blower SB 124 and HB=400 MPa Kn TV.SPL.=1,8 Kn b.St.=1,6. |
