σU
MPa
σP
MPa
ϵL
ψ

08U

parts manufactured cold formed with especially complex and challenging stretch

Classification

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

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Al, %	P, %	C, %	S, %
Standard	Fe, %	Si, %	Mn, %	Al, %	P, %	C, %	S, %
GOST 9045-93	99.435–99.98	< 0.03	< 0.35	0.02–0.07	< 0.02	< 0.07	< 0.025

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	Treatment
Sheet termoobrabotki.	GOST 4041-71	4–8			360		36
Trumpet	GOST 10705-80				255	174	30
Band	GOST 1577-93	6–60			290	175	35	60	Normalization

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Sheet termoobrabotki.			1180
The strip is annealed.			1310

Technological Properties

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

Analogues

USA	Germany
USA	Germany
K00040	1.0347 (DC03)
	1.0213 (C8C)

Standards

Standard	Description
Standard	Description
GOST 9045-93

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
Al	%	Aluminium
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur

Description of mechanical properties

Parameter	Units of measurement	Description
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
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