St1

Classification

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

Chemical composition

Standard Fe, % P, % C, % S, %
GOST 380-2005 > 99.64 < 0.07 < 0.23 < 0.06

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 Treatment
Steel is hot rolled. GOST 380-2005 20–40 310–420

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Alloy GOST 380-2005 normalization 110

Technological Properties

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

Standards

Standard Description
GOST 10298-79
GOST 380-2005
GOST 10298-18

Description of chemical elements

Element Units of measurement Description
Fe % Iron
P % Phosphorus
C % Carbon
S % Sulfur

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

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