20880

Weldability without restrictions. Hardness 20880 hot-rolled Grade (GOST 11036−75) HB 10 ^-1 = 131 MPa

for use in magnetic circuits of electric devices and instruments

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Electrical steel	Unalloyed electrical steel

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cu, %	P, %	C, %	S, %
Standard	Fe, %	Si, %	Mn, %	Cu, %	P, %	C, %	S, %
GOST 11036-75	> 99.015	< 0.3	< 0.3	< 0.3	< 0.02	< 0.035	< 0.03

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	Treatment
Metal rolling	GOST 11036-75			hot rolling	270	24	60
Metal rolling	GOST 11036-75			calibrated	350	4

Magnetic properties

Rolling	Dimensions, $mm$	$H_c$ , $A/m$	$\mu_{max}$ , $MH/m$	$B_{500}$ , $T$	$B_{1000}$ , $T$	$B_{2500}$ , $T$	$B_{5000}$ , $T$	$B_{10000}$ , $T$	$B_{30000}$ , $T$
Rolling	Dimensions, $mm$	$H_c$ , $A/m$	$\mu_{max}$ , $MH/m$	$B_{500}$ , $T$	$B_{1000}$ , $T$	$B_{2500}$ , $T$	$B_{5000}$ , $T$	$B_{10000}$ , $T$	$B_{30000}$ , $T$
Sheet	0.1–3.9	80	5	1.38	1.5	1.62	1.71	1.81	2.05
Grade		80		1.36	1.47	1.57

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Metal rolling	GOST 11036-75	hot rolling	1310

Technological Properties

Weldability
Weldability
no limits

Standards

Standard	Description
Standard	Description
GOST 11036-75

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
Cu	%	Copper
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
$\epsilon_L$	%	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