Precision Alloy 31H8X

No foreign analogues

Designed for vacuum junctions with LENZOS glasses, etc .; TKLR * 1,000,000 in the temperature range from -70 to +400 ºC no more than 9.5−10.5 [1 / ºC]

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Precision alloys	With given TCLE

Chemical composition

Standard	Fe, %	Si, %	Mg, %	Ca, %	Mn, %	Cr, %	Cu, %	Ni, %	Al, %	ET, %
Standard	Fe, %	Si, %	Mg, %	Ca, %	Mn, %	Cr, %	Cu, %	Ni, %	Al, %	ET, %
GOST 10994-74	59.175–61.9	< 0.18	< 0.05	< 0.025	0.2–0.4	7.4–8.2	< 0.05	30.5–31.8	< 0.05	< 0.07

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Physical characteristics

Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\rho$ , $\frac{kg}{m^3}$	$R\cdot 10^{-6}$ , $\Omega\cdot m$
Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\rho$ , $\frac{kg}{m^3}$	$R\cdot 10^{-6}$ , $\Omega\cdot m$
20	142	8200	605

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
Band	GOST 10994-74	100	Transverse		930	450	15

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Band	GOST 10994-74		200

Casting and technological parameters

melting point, °C
melting point, °C
1450

Limit operating modes

Standard	Температура, °C
Standard	Температура, °C
GOST 10994-74	< 500

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
Mg	%	Magnesium
Ca	%	Calcium
Mn	%	Manganese
Cr	%	Chrome
Cu	%	Copper
Ni	%	Nickel
Al	%	Aluminium

Description of physical characteristics

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$E\cdot 10^{9}$	$MPa$	Elastic modulus
$\rho$	$\frac{kg}{m^3}$	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 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