Designation
| Name |
The value |
| Designation GOST Cyrillic |
18Г2С |
| Designation GOST Latin |
18G2C |
| Transliteration |
18G2S |
| By chemical elements |
18Mn2С |
Description
Steel 18G2S used: for the manufacture of fittings designed for conventional reinforcement and prestressed concrete structures.
Standards
| Name |
Code |
Standards |
| Bars and shapes |
В22 |
GOST 5781-82, TU 14-2-949-91, TU 14-1-5254-94 |
| Bars and shapes |
В32 |
TU 14-2-489-82, TU 14-11-245-88 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
| GOST 5781-82 |
0.14-0.23 |
≤0.045 |
≤0.04 |
1.2-1.6 |
≤0.3 |
0.6-0.9 |
≤0.3 |
Rest |
≤0.3 |
Fe is the basis.
According to GOST 5781-82, the addition of Ti (titanium) is allowed from the calculation of its mass fraction in the finished rolled product 0.01-0.03%.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
| Valves without heat treatment in the state of delivery |
| 40-80 |
≥300 |
≥500 |
≥19 |
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 |
Technological properties
| Name |
The value |
| Weldability |
Without restrictions. |
