14G2AF
Manganese-vanadium alloyed steel with nitrogen; According to GOST 27772−88 corresponds to steel for building structures C390. Weldability without restrictions.
Steel structures for industrial buildings, farm crane for bridge cranes.
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, % |
As, % |
P, % |
C, % |
S, % |
N, % |
|---|
| GOST 19281-89 |
96.32–98.295 |
0.3–0.6 |
1.2–1.6 |
< 0.4 |
< 0.3 |
< 0.3 |
0.07–0.12 |
< 0.08 |
< 0.035 |
0.12–0.18 |
< 0.04 |
0.015–0.025 |
Information on suppliers
Physical characteristics
| Temperature, °C |
$$E\cdot 10^{9}$$, $$MPa$$ |
$$\varkappa$$, $$\frac{W}{m\cdot K}$$ |
|---|
| 100 |
196 |
46 |
| 200 |
|
44 |
| 300 |
194 |
42 |
| 400 |
186 |
40 |
| 500 |
177 |
36 |
| 600 |
167 |
33 |
| 700 |
148 |
29 |
| 800 |
124 |
|
| 900 |
106 |
|
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{P}$$, $$MPa$$ |
$$\epsilon_L$$, % |
Treatment |
|---|
| Sheet |
GOST 19282-73 |
5–9 |
|
|
550 |
400 |
20 |
|
| Metal rolling |
|
4 |
|
|
550 |
|
20 |
Normalization |
| Sheet |
GOST 19281-2014 |
< 50 |
|
|
510 |
390 |
19 |
|
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 |
| As |
% |
Arsenic |
| P |
% |
Phosphorus |
| C |
% |
Carbon |
| S |
% |
Sulfur |
| N |
% |
Nitrogen |
Description of physical characteristics
| Parameter |
Units of measurement |
Description |
| $$E\cdot 10^{9}$$ |
$$MPa$$ |
Elastic modulus |
| $$\varkappa$$ |
$$\frac{W}{m\cdot K}$$ |
Coefficient of thermal conductivity (the heat capacity of the material) |
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 |
|
|