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

Weldability
no limits

Standards

Standard Description
GOST 19281-89

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