Steel St6sp (ВСт6сп)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
Ст6сп |
| Designation GOST Latin |
Ct6cp |
| Transliteration |
St6sp |
| The chemical elements |
6 |
| Name |
The value |
| Designation GOST Cyrillic |
ВСт6сп |
| Designation GOST Latin |
BCt6cp |
| Transliteration |
VSt6sp |
| The 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 |
| Pipes steel and connecting parts 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 |
| Tapes |
В24 |
GOST 3560-73, STP М309-74 |
| Classification, nomenclature and general norms |
В20 |
GOST 380-2005 |
| Sectional and shaped rolling |
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 stripes |
В23 |
GOST 82-70, GOST 14918-80, GOST 19903-74, GOST 103-2006, GOST 19903-90 |
| Bulls. Blanks. Slabs |
В31 |
OST 3-1686-90, TU 14-1-4944-90 |
| Sheets and stripes |
В33 |
TU 14-1-4431-88 |
| Sectional and shaped rolling |
В32 |
TU 14-2-849-89, TU 14-11-245-88, TU 14-1-1271-75, TU 14-136-367-2008 |
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
| 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 |
| 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 |
| y |
The relative narrowing |
| kJ/m2 |
Toughness |
Physical characteristics
| Temperature |
Е, ГПа |
G, ГПа |
| 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. |
| Propensity to temper brittleness |
Tend not. |
| Forging temperature |
Start - 1250 °C, the end - 780 °C. the cross Sections up to 400 mm are cooled in air. |
| Flock-sensitive sensitivity |
not sensitive. |
| Workability by cutting |
In hot-rolled state when HB 158 and blower SB=640 MPa Kn TV.SPL.=1,2 Kn b.St.=1,2. |
