Designation
| Name |
The value |
| Designation GOST Cyrillic |
А4 |
| Designation GOST Latin |
A4 |
| Transliteration |
A4 |
| By chemical elements |
- |
Description
Steel A4 used: for the manufacture of laminated and forged billet of square or circular cross-section designed for the production of axles of locomotives, electric trains, diesel and electric trains, wagons, railway and subway Railways.
Note
A steel alloy.
Standards
| Name |
Code |
Standards |
| Bandages. Wheels. Axis |
В41 |
GOST 30272-96, GOST 31334-2007 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Fe |
Cu |
V |
Mo |
| GOST 31334-2007 |
≤0.4 |
≤0.04 |
≤0.04 |
≤0.8 |
≤1.2 |
≤0.5 |
Rest |
≤0.3 |
≤0.1 |
≤0.35 |
Fe is the basis.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
KCU, kJ/m2 |
| Steel A4. The axis of the driving and trailer cars for 31331-2007 GOST, ISO 105-3-82. Mode T: Tempering + Vacation |
|
≥420 |
650-800 |
≥19 |
≥392 |
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 |
| KCU |
Toughness |
