12GN2MFAYU
Weldability without restrictions.
large spans of bridges, pressure pipelines HPP, operating equipment excavators
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, % |
V, % |
Al, % |
P, % |
C, % |
S, % |
Mo, % |
N, % |
TU 14-1-104-13-75 |
95.16–96.94 |
0.4–0.6 |
0.9–1.3 |
< 0.5 |
< 0.03 |
1.4–1.7 |
0.05–0.1 |
0.05–0.1 |
< 0.035 |
0.09–0.16 |
< 0.035 |
0.15–0.25 |
0.02–0.03 |
Information on suppliers
Mechanical properties at 20 °C
Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{P}$$, $$MPa$$ |
$$\epsilon_L$$, % |
Treatment |
Alloy |
|
|
|
|
700–850 |
600–700 |
14 |
Hardening and tempering |
Technological Properties
Standards
Description of chemical elements
Element |
Units of measurement |
Description |
Fe |
% |
Iron |
Si |
% |
Silicon |
Mn |
% |
Manganese |
Cr |
% |
Chrome |
Cu |
% |
Copper |
Ni |
% |
Nickel |
V |
% |
Vanadium |
Al |
% |
Aluminium |
P |
% |
Phosphorus |
C |
% |
Carbon |
S |
% |
Sulfur |
Mo |
% |
Molybdenum |
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 |
|
|