Designation
| Name |
The value |
| Designation GOST Cyrillic |
12Г2СМФ |
| Designation GOST Latin |
12G2CMF |
| Transliteration |
12G2SMF |
| By chemical elements |
12Mn2СMoV |
Description
Steel 12Г2СМФ used: to manufacture the welded metal structures; superstructures of railway bridges.
Standards
| Name |
Code |
Standards |
| Sheets and strips |
В23 |
GOST 19903-74, GOST 19903-90, TU 14-1-1308-75 |
| Welding and cutting metals. Soldering, riveting |
В05 |
OST 36-58-81 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Mo |
| TU 14-1-1308-75 |
0.09-0.15 |
≤0.035 |
≤0.035 |
1.3-1.7 |
≤0.3 |
0.4-0.7 |
≤0.3 |
Rest |
≤0.3 |
0.07-0.15 |
0.15-0.25 |
Fe is the basis.
It is allowed to increase the viscosity by introducing into the steel 0.05-0.10% aluminum and 0.015-0.030% nitrogen. In this case, the steel is designated 12Г2СМФАЮ.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
KCU, kJ/m2 |
| Rolled sheet. Hardening + vacation |
| 10-36 |
685 |
590 |
14 |
340 |
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 |
Technological properties
| Name |
The value |
| Weldability |
without restrictions |
