ρ
kgm3
σU
MPa
Hc
A/m
μmax
MH/m
B1000
T

Iron-cobalt-nickel alloy 25KF14N

It is used for the active part of hysteresis motors.

Classification

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

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Co, %	Ni, %	V, %	P, %	C, %	S, %
Standard	Fe, %	Si, %	Mn, %	Co, %	Ni, %	V, %	P, %	C, %	S, %
GOST 10994-74	54.7–58.5	< 0.3	< 0.4	24.5–25.5	13.5–14.5	3.5–4.5	< 0.02	< 0.06	< 0.02

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Physical characteristics

Temperature, °C	$\rho$ , $\frac{kg}{m^3}$
Temperature, °C	$\rho$ , $\frac{kg}{m^3}$
20	8180

Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	d5, %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	d5, %	Treatment
Tape	GOST 10994-74	<2.0	Transverse	raw, cold rolling, thin, Transverse	1600–2000	2–5

Magnetic properties

Rolling	$H_c$ , $A/m$	$\mu_{max}$ , $MH/m$	$B_{1000}$ , $T$
Rolling	$H_c$ , $A/m$	$\mu_{max}$ , $MH/m$	$B_{1000}$ , $T$
Tape	6.4–8	2000–4000	0.8–1.05

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Rolling	Standard	Classifiers	Value, HRC
Rolling	Standard	Classifiers	Value, HRC
Tape	GOST 10994-74	raw, cold rolling, thin, Transverse	35–40

Technological Properties

Weldability	Flake Susceptibility	Propensity to temper brittleness
Weldability	Flake Susceptibility	Propensity to temper brittleness
Not applicable for welded structures	insensitive	not inclined

Properties

Property
Property
the alloy is anisotropic

Standards

Standard	Description
Standard	Description
GOST 10994-74

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
Co	%	Cobalt
Ni	%	Nickel
V	%	Vanadium
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur

Description of physical characteristics

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$\rho$	$\frac{kg}{m^3}$	The density of the material

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
d5	%	Elongation at break
$\sigma _{U}$	$MPa$	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)
$\mu_{max}$	$MH/m$	Magnetic permeability (not more)
$B_{1000}$	$T$	Magnetic induction (not less) in a magnetic field while magnetic field strength is 1000 A/m

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