Designation
| Name |
The value |
| Designation GOST Cyrillic |
20ХГСА |
| Designation GOST Latin |
20XGCA |
| Transliteration |
20HGSA |
| By chemical elements |
20CrMnС |
Description
20KHGSA steel is used: for the manufacture of hot rolled plates; chassis screws, axles, shafts, worms and other parts operating in conditions of wear and alternating loads at temperatures up to +200 °C; solid-rolled rings for different purposes.
Note
Structural steel high-quality chromonemata.
Standards
| Name |
Code |
Standards |
| Sheets and strips |
В23 |
GOST 103-2006 |
| Bars and shapes |
В22 |
GOST 1133-71, GOST 8319.0-75, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006 |
| Bars and shapes |
В32 |
GOST 4543-71, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 10702-78, GOST 14955-77, OST 1 92049-76, TU 14-1-2118-77, TU 14-11-245-88, TU 14-1-1271-75, TU 14-1-5228-93, TU 14-136-367-2008 |
| Blanks. Of the workpiece. Slabs |
В31 |
OST 3-1686-90, TU 14-1-4944-90 |
| Sheets and strips |
В33 |
TU 14-1-1409-75, TU 14-1-4118-86, TU 14-1-4118-2004 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Ti |
Mo |
W |
| TU 14-1-4118-2004 |
0.17-0.23 |
≤0.025 |
≤0.025 |
0.8-1.1 |
0.8-1.1 |
0.9-1.2 |
≤0.3 |
Rest |
≤0.3 |
≤0.05 |
≤0.03 |
≤0.15 |
≤0.2 |
Fe is the basis.
GOST 4543-71 regulates the content of high-quality steel: P≤0,025%; S≤0.015%; Сu≤0.25%.
Mechanical properties
| Section, mm |
t отпуска, °C |
sT|s0,2, MPa |
σU, MPa |
d5, % |
d4 |
d10 |
y, % |
KCU, kJ/m2 |
HB, MPa |
| Hot-rolled steel and hot rolled with special surface finish |
| - |
- |
- |
- |
- |
- |
- |
- |
- |
≤197 |
| Steel calibrated and calibrated with special surface finish |
| - |
- |
- |
- |
- |
- |
- |
- |
- |
≤207 |
| Quenching in oil at 880 °C + vacation at 500 °C, cooling in water or oil |
| ≤15 |
- |
≥640 |
≥780 |
≥12 |
- |
- |
≥45 |
≥677 |
- |
| Samples. Quenching in oil from 900 °C to +leave (exposure 30 min), air cooling |
| - |
200 |
- |
≥1520 |
≥9 |
- |
- |
≥49 |
≥577 |
≤420 |
| Flats on the other 14-1-4118-2004 |
|
- |
- |
490-690 |
- |
≥15 |
≥18 |
- |
- |
- |
| Samples. Quenching in oil from 900 °C to +leave (exposure 30 min), air cooling |
| - |
300 |
- |
≥1470 |
≥9 |
- |
- |
≥52 |
≥577 |
≤400 |
| - |
400 |
- |
≥1340 |
≥8 |
- |
- |
≥50 |
≥481 |
≤360 |
| - |
500 |
- |
≥1080 |
≥10 |
- |
- |
≥50 |
≥765 |
≤325 |
| - |
600 |
- |
≥880 |
≥17 |
- |
- |
≥52 |
≥961 |
≤255 |
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 |
| d10 |
Elongation after rupture |
| y |
The relative narrowing |
| KCU |
Toughness |
| HB |
Brinell hardness number |
Physical characteristics
| Temperature |
r, kg/m3 |
| 0 |
7760 |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| G |
Modulus of elasticity shear torsion |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
| a |
The coefficient of linear expansion |
Technological properties
| Name |
The value |
| Weldability |
without limitation of RDS, CBS, ARDS, ADB submerged arc and gas protection electroslag welding - requires a subsequent heat treatment. |
| Склонность к отпускной хрупкости |
inclined |
| The temperature of forging |
Start - 1200 °C, the end - of 800 °C. |
| Flock-sensitive sensitivity |
not sensitive |
| Machinability |
when NV 140-207 Kn TV.SPL.=0.7 Kn b.St.=0.60 |
