α⋅106
K−1
ρ
kgm3
R⋅10−6
Ω⋅m
σU
MPa
σY
MPa
μmax
MH/m

Magnetically soft precision alloy 31NH3G2

No foreign analogues

Used in the electric vacuum industry

Classification

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

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	ET, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	ET, %
GOST 10994-74	61.31–64.4	0.3–0.8	1.5–2	2.8–3.8	31–32	< 0.09

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Physical characteristics

Temperature, °C	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\rho$ , $\frac{kg}{m^3}$	$R\cdot 10^{-6}$ , $\Omega\cdot m$	Cp, Дж/кг·К
Temperature, °C	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\rho$ , $\frac{kg}{m^3}$	$R\cdot 10^{-6}$ , $\Omega\cdot m$	Cp, Дж/кг·К
20	15.6	8040	86	452

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	GOST 10994-74	50	Transverse		200–210	130–140	15–20

Magnetic properties

Rolling	$\mu_{max}$ , $MH/m$
Rolling	$\mu_{max}$ , $MH/m$
Tape	< 11000

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Tape	GOST 10994-74		80–90

Limit operating modes

Standard	Температура, °C
Standard	Температура, °C
GOST 10994-74	< 90

Analogues

Russia
Russia
Сплав ЭП544

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
Mn	%	Manganese
Cr	%	Chrome
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)
$\rho$	$\frac{kg}{m^3}$	The density of the material
$R\cdot 10^{-6}$	$\Omega\cdot m$	Electrical resistivity

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
$\mu_{max}$	$MH/m$	Magnetic permeability (not more)