St2sp (VSt2sp)

non-critical items requiring higher ductility or deep-drawing; malanagruzhennye elements of welded structures operating at constant load and at positive temperatures

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	97.972–99.51	0.15–0.3	0.25–0.5	< 0.3	< 0.3	< 0.3	< 0.08	< 0.04	0.09–0.15	< 0.05	< 0.008

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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				334	225	24
Trumpet	GOST 10705-80				333	206	24
Hire	GOST 535-2005				335–430	195–225	29–32
The plates	GOST 14637-89				330–430	195–225	29–32
Rod	GOST 30136-95				420–470			60

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Alloy			1160

Technological Properties

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

Analogues

USA	Germany
K02502	1.0032 (St 34-2)

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