09G2 (10G2, 09G2S, 09G2D)
Unalloyed high quality manganese steel. Not prone to temper embrittlement: Weldability without restrictions. Flock sensitivity: not sensitive.
Rack of farms, the top trim cars, spinal beams, I-beams and other parts of car building, parts of excavators, the elements of welded metal and other parts operating at temperatures from -40 to +450 C.
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Structural steel |
Low alloy structural steel for welded structures |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Cr, % |
Cu, % |
Ni, % |
As, % |
P, % |
C, % |
S, % |
N, % |
|---|
| GOST 19281-89 |
96.647–98.43 |
0.17–0.37 |
1.4–1.8 |
< 0.3 |
< 0.3 |
< 0.3 |
< 0.08 |
< 0.035 |
< 0.12 |
< 0.04 |
< 0.008 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{P}$$, $$MPa$$ |
$$\epsilon_L$$, % |
Treatment |
|---|
| Sheet |
GOST 19282-73 |
4 |
|
|
450 |
310 |
21 |
|
| Grade |
GOST 19281-2014 |
< 140 |
|
|
480 |
345 |
21 |
|
Technological Properties
| Weldability |
Flake Susceptibility |
Propensity to temper brittleness |
|---|
| no limits |
not sensitive |
not inclined |
Critical point temperatures
| Ac1, K |
Ac3(Acm), K |
Ar3(Arcm), K |
Ar1, K |
Mn, K |
|---|
| 720 |
830 |
710 |
620 |
320 |
Analogues
| Germany |
United Kingdom |
China |
Bulgaria |
Poland |
|---|
| 1.1123 (7Mn6) |
68F62H5 |
09Mn2 |
09G2 |
09G2 |
| 7Mn6 |
|
|
|
|
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| Mn |
% |
Manganese |
| Cr |
% |
Chrome |
| Cu |
% |
Copper |
| Ni |
% |
Nickel |
| As |
% |
Arsenic |
| P |
% |
Phosphorus |
| C |
% |
Carbon |
| S |
% |
Sulfur |
| N |
% |
Nitrogen |
Description of mechanical properties
| Parameter |
Units of measurement |
Description |
| $$\sigma _{U}$$ |
$$MPa$$ |
Ultimate tensile strength |
| $$\sigma_{P}$$ |
$$MPa$$ |
Proportionality limit |
| $$\epsilon_L$$ |
% |
Elongation at break (longitudinal) |
Designation of types of weldability
| Parameter |
Units of measurement |
Description |
| no limits |
|
Welding is performed without heating and without subsequent heat treatment |
| Boundedly welded |
|
Welding is possible with heating up to 100–120 °C and subsequent heat treatment |
| Difficult to weld |
|
For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing |
| Not applicable for welded structures |
|
|
Description of temperatures of critical points
| Parameter |
Units of measurement |
Description |
| Ac1 |
K |
|
| Ac3(Acm) |
K |
|
| Ar3(Arcm) |
K |
|
| Ar1 |
K |
|
| Mn |
K |
|