Precision Alloy 25NU

No foreign analogues

It is used for the manufacture of parts of devices that require dimensional stability in the range of climatic temperatures; in the range from -60 to +100 ºC

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Precision alloys	With high electrical resistance

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Ni, %	Al, %	Nb, %	ET, %
Standard	Fe, %	Si, %	Mn, %	Ni, %	Al, %	Nb, %	ET, %
GOST 10994-74	59.65–63.4	< 0.4	< 0.6	24.5–25.5	8.4–9.6	3.7–4.2	< 0.05

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Physical characteristics

Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\rho$ , $\frac{kg}{m^3}$
Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\rho$ , $\frac{kg}{m^3}$
20	145	6.8–7.4	8200

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	<2.0	Transverse	raw, cold rolling, thin, Transverse	< 950	< 600	5–8

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
Ni	%	Nickel
Al	%	Aluminium
Nb	%	Niobium

Description of physical characteristics

Parameter	Units of measurement	Description
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

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