Designation
| Name |
The value |
| Designation GOST Cyrillic |
55С2А |
| Designation GOST Latin |
55C2A |
| Transliteration |
55S2A |
| By chemical elements |
55С2 |
Description
55S2A steel is used: for the manufacture of springs for vehicles, springs of rolling stock of railway transport, other carriage springs in various branches of engineering.
Note
Steel spring alloy of high quality.
Standards
| Name |
Code |
Standards |
| Bars and shapes |
В32 |
GOST 14959-79, TU 14-1-2118-77, TU 14-11-245-88, TU 14-136-367-2008 |
| Steel wire medium and high carbon |
В72 |
GOST 26366-84 |
| Sheets and strips |
В33 |
TU 14-1-1986-77, TU 14-130-278-96 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
| GOST 14959-79 |
0.53-0.58 |
≤0.025 |
≤0.025 |
0.6-0.9 |
≤0.3 |
1.5-2 |
≤0.25 |
Rest |
≤0.2 |
Fe is the basis.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
| Rolled steel. Quenching in oil from 870 °C to + Vacation at 460-470 °C |
| 80 |
1177-1200 |
1275-1300 |
≥6 |
≥30 |
| Rolled steel. Steel categories: 3, 3A, 3B, 3C, 3D, 4, 4A, 4B. Quenching in oil or water from 870 °C to + vacation at 470 °C |
|
≥1175 |
≥1270 |
≥6 |
≥30 |
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 |
Technological properties
| Name |
The value |
| Weldability |
does not apply to welded structures |
| Склонность к отпускной хрупкости |
tend not |
| Flock-sensitive sensitivity |
not sensitive |
