Alloy 34NKM (Alloy 34NVMP)

For the manufacture of cores of magnetic amplifiers, commutating chokes, rectifier units, elements of computing devices of calculating machines. Alloy production in Russia is carried out in accordance with GOST 10994−74

Classification

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

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Co, %	Ni, %	P, %	C, %	S, %	Mo, %
Standard	Fe, %	Si, %	Mn, %	Co, %	Ni, %	P, %	C, %	S, %	Mo, %
GOST 10994-74	30.83–34.75	0.15–0.3	0.3–0.6	28.5–30	33.5–35	< 0.02	< 0.03	< 0.02	2.8–3.2

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Physical characteristics

Temperature, °C	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\rho$ , $\frac{kg}{m^3}$	$R\cdot 10^{-6}$ , $\Omega\cdot m$
Temperature, °C	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\rho$ , $\frac{kg}{m^3}$	$R\cdot 10^{-6}$ , $\Omega\cdot m$
20		8500	0.5
100	10.6

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
Tape					540		40	40
Tape				cold-work	930	885	4	5

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Tape			130
Tape		cold-work	155

Casting and technological parameters

melting point, °C
melting point, °C
1460

Limit operating modes

Standard	Температура, °C
Standard	Температура, °C
GOST 10994-74	< 200

Analogues

Russia
Russia
Сплав 34НКМП

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
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur
Mo	%	Molybdenum

Description of physical characteristics

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$\alpha\cdot 10^{6}$	$K^{-1}$	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
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\sigma_{P}$	$MPa$	Proportionality limit
$\epsilon_L$	%	Elongation at break (longitudinal)
$\psi$	%	Reduction in cross section on fracture

Description of the casting and technological parameters

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
melting point	°C	The temperature at which solid crystalline body makes the transition to the liquid state and Vice versa