St3ps (VSt3ps)

Bearing elements of welded and non-welded structures and components operating at positive temperatures, fittings At400S class

Classification

Country Section Category
CIS, Russia, Ukraine Structural steel Carbonaceous structural steel of ordinary quality

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Cu, % Ni, % As, % P, % C, % S, % N, %
GOST 380-2005 97.902–99.41 0.05–0.15 0.4–0.65 < 0.3 < 0.3 < 0.3 < 0.08 < 0.04 0.14–0.22 < 0.05 < 0.008

Information on suppliers

Physical characteristics

Temperature, °C $$\rho$$, $$\frac{kg}{m^3}$$
20 7850

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{P}$$, $$MPa$$ $$\epsilon_L$$, % $$\psi$$, % Treatment
Trumpet GOST 8696-74 372 245 23
Trumpet GOST 10705-80 372 225 22
Hire GOST 535-2005 370–480 205–245 23–26
The plates GOST 14637-89 370–480 205–245 23–26
Fittings GOST 5781-82 373 235 25
Rod GOST 30136-95 490–540 60

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Alloy 1310

Technological Properties

Weldability Flake Susceptibility Propensity to temper brittleness
no limits not sensitive not inclined

Analogues

USA
K02702

Standards

Standard Description
GOST 380-2005

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 physical characteristics

Parameter Units of measurement Description
$$\rho$$ $$\frac{kg}{m^3}$$ The density 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)
$$\psi$$ % Reduction in cross section on fracture

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