Steel 70 (M70)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
70 |
| Designation GOST Latin |
70 |
| Transliteration |
70 |
| The chemical elements |
70 |
| Name |
The value |
| Designation GOST Cyrillic |
М70 |
| Designation GOST Latin |
M70 |
| Transliteration |
M70 |
| The chemical elements |
Mo70 |
Description
Steel 70 used: for the manufacture of rails types of R38 and R43 for the coal, mining and other industries.
Note
M70 — steel open-hearth rail.
Standards
| Name |
Code |
Standards |
| Rails. Lining. Lining. Crutches |
В42 |
GOST 30165-94 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Si |
Fe |
| GOST 30165-94 |
0.6-0.8 |
≤0.05 |
≤0.04 |
0.5-1 |
0.05-0.17 |
The rest |
Fe is the basis.
Mechanical characteristics
| Section, mm |
σB, MPa |
d5, % |
| Mechanical properties of steel for rails types of R38 and R43 for the coal and mining industry according to GOST 30165-94 |
|
≥765 |
≥4 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
Physical characteristics
| Temperature |
r, кг/м3 |
| 20 |
7850 |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
