Steel St6sp (ВСт6сп)
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | Ст6сп |
| Designation GOST Latin | Ct6cp |
| Transliteration | St6sp |
| By chemical elements | 6 |
| Name | The value |
|---|---|
| Designation GOST Cyrillic | ВСт6сп |
| Designation GOST Latin | BCt6cp |
| Transliteration | VSt6sp |
| By chemical elements | 6 |
Description
St6sp steel is used: for the manufacture of Bab hammers, spindles, wedges, construction scrap and other parts exposed to impact loads; parts of high strength (axles, shafts, fingers, pistons and other parts in heat treated condition); rod of rebar periodic profile, a trapezoidal profile for a bit and strip profile with thickening of agricultural machinery; two-headed rails, t-type P5, is designed for ground and suspended tracks.
Note
The degree of deoxidation — SP.
Standards
| Name | Code | Standards |
|---|---|---|
| Steel pipes and fittings to them | В62 | GOST 3262-75, GOST 8732-78, GOST 9567-75, GOST 8731-87, GOST Р 53383-2009, TU 14-3-1160-83, TU 14-3-1428-86, TU 14-3-1473-87, TU 14-3Р-50-2001, TU 14-3-1654-89 |
| Tape | В24 | GOST 3560-73, 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 8509-93, GOST 8510-86, GOST 12492.3-90, GOST 12492.8-90, GOST 12492.10-90, 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 |
| Sheets and strips | В23 | GOST 82-70, GOST 14918-80, GOST 19903-74, 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 14-1-4431-88 |
| 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 | 0.38-0.49 | ≤0.05 | ≤0.04 | 0.5-0.8 | ≤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, % | y, % | KCU, kJ/m2 |
|---|---|---|---|---|---|
| Long products | |||||
| - | ≥325 | ≥535 | ≥25 | ≥52 | - |
| - | ≥305 | ≥505 | ≥20 | ≥53 | - |
| - | ≥305 | - | - | ≥39 | - |
| - | ≥200 | - | ≥21 | ≥51 | - |
| - | ≥180 | ≥500 | ≥23 | ≥64 | - |
| - | ≥150 | ≥355 | ≥24 | ≥70 | - |
| - | ≥81 | ≥190 | ≥35 | ≥83 | - |
| Rolled steel in the delivery state | |||||
| ≤25 | ≥325 | ≥535 | ≥25 | ≥52 | ≥630 |
| The hot rolled shapes in the state of delivery | |||||
| 20-40 | ≥305 | ≥590 | ≥14 | - | - |
| 20 | ≥315 | ≥590 | ≥15 | - | - |
| 40 | ≥295 | ≥590 | ≥12 | - | - |
| Seamless hot deformed tubes in the delivery condition | |||||
| ≥305 | ≥590 | ≥14 | - | - | |
| Normalization at 840-880 °C, air cooling to 450-500 °C + High tempering at 620-650 °C | |||||
| 300 | - | ≥640 | ≥23 | ≥42 | - |
| Forgings. Quenching in water from 840-860 °C + Vacation at 600-640 °C | |||||
| 220 | 390-530 | 670-810 | 18-23 | 50-57 | 390-640 |
| Forgings. Quenching in oil 840-860 °C + Vacation at 580-620 °C | |||||
| 220 | 390-530 | 700-850 | 17-24 | 46-54 | 340-540 |
| Forgings. Isothermal annealing at 830-860 °C + Isothermal holding at 630-660 °C | |||||
| 400 | - | ≥640 | ≥22 | ≥42 | - |
| Forgings. Annealing at 830-860 °C | |||||
| 400 | - | ≥670 | ≥19 | ≥36 | - |
| A sample with a diameter of 10 and a length of 100 mm laminated. The rate of deformation of 120 mm/min and strain Rate of 0.02 1/s | |||||
| - | - | ≥165 | ≥33 | ≥94 | - |
| - | - | ≥105 | ≥62 | ≥95 | - |
| - | - | ≥75 | ≥50 | ≥93 | - |
| A sample with a diameter of 10 and a length of 50 mm laminated. The strain rate of 120 mm/min strain Rate of 0.04 1/s | |||||
| - | - | ≥55 | ≥92 | ≥100 | - |
| - | - | ≥37 | ≥100 | ≥100 | - |
| - | - | ≥27 | ≥106 | ≥100 | - |
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 |
| y | The relative narrowing |
| KCU | Toughness |
Physical characteristics
| Temperature | Е, HPa | G, HPa |
|---|---|---|
| 0 | 197 | 82 |
| 20 | 197 | - |
| 100 | 197 | 80 |
| 200 | 186 | 77 |
| 300 | 175 | 74 |
| 400 | 168 | 71 |
| 500 | - | 67 |
| 600 | - | 62 |
A description of the physical symbols
| Name | Description |
|---|---|
| Е | The normal elasticity modulus |
| r | Density |
| l | Coefficient of thermal conductivity |
| R | UD. the resistivity |
Technological properties
| Name | The value |
|---|---|
| Weldability | Limited weldability; welding methods: SMAW, ADS submerged arc and gas protection electroslag welding. Recommended heating and subsequent heat treatment. The CCC without restriction. |
| The tendency to temper brittleness | Tend not. |
| The temperature of forging | Start - 1250 °C, the end - 780 °C. the cross Sections up to 400 mm are cooled in air. |
| Flock-sensitive sensitivity | not sensitive. |
| Machinability | In hot-rolled state when HB 158 and blower SB=640 MPa Kn TV.SPL.=1,2 Kn b.St.=1,2. |
