Precision alloy 30NGHKR (Alloys PN80X7SR and PHN7SR)

No foreign analogues

It is used for the manufacture of magnets, cores and pole pieces.

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Precision alloys	Soft Magnetic Precision Alloys

Chemical composition

Standard	Fe, %	Si, %	B, %	Mn, %	Ni, %	ET, %
Standard	Fe, %	Si, %	B, %	Mn, %	Ni, %	ET, %
GOST 10994-74	2.8–3.8	4.3–4.8	> 2.8	< 0.4	88.11–90.1	< 0.09

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Physical characteristics

Temperature, °C	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\varkappa$ , $\frac{W}{m\cdot K}$	$\rho$ , $\frac{kg}{m^3}$	Cp, Дж/кг·К
Temperature, °C	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\varkappa$ , $\frac{W}{m\cdot K}$	$\rho$ , $\frac{kg}{m^3}$	Cp, Дж/кг·К
20	15.5	68.5	8000	456

Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{Y}$ , $MPa$	d5, %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{Y}$ , $MPa$	d5, %	Treatment
Tape	TU 14-1-1168-75	<2.0	Transverse		500	150	> 2

Magnetic properties

Rolling	$H_c$ , $A/m$
Rolling	$H_c$ , $A/m$
Tape	3.75

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Tape	TU 14-1-1168-75		100–120

Technological Properties

Weldability	Flake Susceptibility	Propensity to temper brittleness
Weldability	Flake Susceptibility	Propensity to temper brittleness
Difficult to weld	sensitive	loathsome

Properties

Property
Property
the melt has anisotropy of magnetic properties and a rectangular hysteresis loop

Analogues

Russia
Russia
Сплав ЭК122

Standards

Standard	Description
Standard	Description
GOST 10994-74

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
ET	%	Total other items
Fe	%	Iron
Si	%	Silicon
B	%	Bor
Mn	%	Manganese
Ni	%	Nickel

Description of physical characteristics

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
Cp	Дж/кг·К	Specific heat of material
$\alpha\cdot 10^{6}$	$K^{-1}$	Coefficient of thermal (linear) expansion (range 20°C–T)
$\varkappa$	$\frac{W}{m\cdot K}$	Coefficient of thermal conductivity (the heat capacity of the material)
$\rho$	$\frac{kg}{m^3}$	The density of the material

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
d5	%	Elongation at break
$\sigma_{Y}$	$MPa$	Yield strength
$\sigma _{U}$	$MPa$	Ultimate tensile strength

Description of magnetic properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$H_c$	$A/m$	Magnetic coercivity (not more)

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