E⋅109
MPa
ρ
kgm3
R⋅10−6
Ω⋅m
σU
MPa
σY
MPa
σU
MPa
σY
MPa

Precision alloy 31NH3G

No foreign analogues

It is used for structures and pipelines operating at low temperatures; TKLR * 1,000,000 in the temperature range from -258 to +20 and from +20 to +100 ºC no more than 1.0−2.0 [1 / ºC]

Classification

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

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	ET, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	ET, %
GOST 10994-74	62.81–65.1	0.3–0.6	0.3–0.7	3.3–3.8	31–32	< 0.09

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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	143	8200	760

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	50	Transverse			190–210	25–35

Mechanical properties at 25 °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
		50			400–450

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Tape	GOST 10994-74		120–150

Casting and technological parameters

melting point, °C
melting point, °C
1450

Limit operating modes

Standard	Температура, °C
Standard	Температура, °C
GOST 10994-74	< 150

Heat Treatment Modes

Treatment
Treatment
Отжиг

Analogues

Russia
Russia
Сплав ЭП545

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
Cr	%	Chrome
Ni	%	Nickel

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