Steel 73Т (M73T)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
73Т |
| Designation GOST Latin |
73T |
| Transliteration |
73T |
| The chemical elements |
73Ti |
| Name |
The value |
| Designation GOST Cyrillic |
М73Т |
| Designation GOST Latin |
M73T |
| Transliteration |
M73T |
| The chemical elements |
Mo73Ti |
Description
73 Т steel is used: for the manufacture of rails Ostryakova types OR75, OR65 and OR50, used in the construction of the top structure of a railway track.
Note
M73T — steel open-hearth rail with titanium.
Standards
| Name |
Code |
Standards |
| Rails. Lining. Lining. Crutches |
В42 |
GOST 9960-85, GOST 17507-85, GOST 17508-85, GOST 26168-84 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Si |
Fe |
Ti |
| GOST 9960-85 |
0.67-0.78 |
≤0.04 |
≤0.035 |
0.75-1.05 |
0.18-0.45 |
The rest |
0.007-0.015 |
Fe is the basis.
According to GOST 9960-85 the rails should be made of calm open-hearth steel, deoxidized in the ladle with complex deoxidizers without the use of aluminum or other deoxidizers, which form harmful non-metallic inclusions in steel.
Mechanical characteristics
| Section, mm |
σB, MPa |
d5, % |
| Mechanical properties of steel for rails types OR75, OR65 and OR50 according to GOST 9960-85 on delivery |
|
≥900 |
≥5 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
