An alloy of iron with nickel and cobalt alloyed with chromium 35NKHSP

Chemical composition

Fe	Iron	Rest
Co	Cobalt	27.0 — 29.0
Si	Silicon	0.8 — 1.2
Mn	Manganese	0.3 — 0.6
Ni	Nickel	35.0 — 37.0
S	Sulfur	<0.02
C	Carbon	<0.03
P	Phosphorus	<0.02
Cr	Chromium	1.8 — 2.2

Domestic counterpart — 35NKHS

Contains an increased percentage of manganese. When changing for the manufacture of cores of magnetic amplifiers, switching chokes, rectifier installations; the alloy has anisotropy of magnetic properties and a rectangular hysteresis loop. Production in Russia is carried out in accordance with the requirements of GOST 10994−74 and GOST 10160−75

Classification

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

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Co, %	Cr, %	Ni, %	P, %	C, %	S, %
GOST 10994-74	29.93–35.1	0.8–1.2	0.3–0.6	27–29	1.8–2.2	35–37	< 0.02	< 0.03	< 0.02

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Physical characteristics

Temperature, °C	$$E\cdot 10^{9}$$, $$MPa$$	$$\alpha\cdot 10^{6}$$, $$K^{-1}$$	$$\rho$$, $$\frac{kg}{m^3}$$	$$R\cdot 10^{-6}$$, $$\Omega\cdot m$$
20	170		8400	0.6
100		10.8

Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$$\sigma _{U}$$, $$MPa$$	$$\sigma_{P}$$, $$MPa$$	$$\epsilon_L$$, %	Treatment
Tape					490	145	40
Tape				cold-work	880		4

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
			130–170

Standards

Standard	Description
GOST 10994-74

Description of chemical elements

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

Description of physical characteristics

Parameter	Units of measurement	Description
$$E\cdot 10^{9}$$	$$MPa$$	Elastic modulus
$$\alpha\cdot 10^{6}$$	$$K^{-1}$$	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
$$\sigma _{U}$$	$$MPa$$	Ultimate tensile strength
$$\sigma_{P}$$	$$MPa$$	Proportionality limit
$$\epsilon_L$$	%	Elongation at break (longitudinal)