NMtsAK2-2-1 (Alumel)

Thermocouple wire

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Nickel, nickel alloys	Nickel alloys

Chemical composition

Standard	Fe, %	Si, %	Mg, %	Bi, %	Mn, %	Co, %	Cu, %	Sb, %	Al, %	Pb, %	As, %	P, %	C, %	S, %	Ni + Co, %
Standard	Fe, %	Si, %	Mg, %	Bi, %	Mn, %	Co, %	Cu, %	Sb, %	Al, %	Pb, %	As, %	P, %	C, %	S, %	Ni + Co, %
GOST 492-2006	< 0.3	0.85–1.5	< 0.05	< 0.002	1.8–2.7	0.6–1.2	< 0.25	< 0.002	1.6–2.4	< 0.002	< 0.002	< 0.005	< 0.1	< 0.01	91.5–95.15

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Physical characteristics

Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\rho$ , $\frac{kg}{m^3}$	$R\cdot 10^{-6}$ , $\Omega\cdot m$
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	182		8500	0.32
100		13.5

Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\epsilon_L$ , %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\epsilon_L$ , %	Treatment
Alloy				soft	500–600
Alloy				solid	1000–1100	3.5

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Alloy		soft	0–0
Alloy		solid	250–300

Casting and technological parameters

melting point, °C	Hot working temperature, °C	annealing temperature, °C
melting point, °C	Hot working temperature, °C	annealing temperature, °C
1440	1250–1000	900–950

Analogues

Germany
Germany
2.4122
2.4122 (NiMn3Al)

Standards

Standard	Description
Standard	Description
GOST 492-2006
GOST 1790-16
GOST 492-1973
DSTU GOST 492:2007

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mg	%	Magnesium
Bi	%	Bismuth
Mn	%	Manganese
Co	%	Cobalt
Cu	%	Copper
Sb	%	Antimony
Al	%	Aluminium
Pb	%	Lead
As	%	Arsenic
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur
Ni + Co	%	Nickel + Cobalt

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
$R\cdot 10^{-6}$	$\Omega\cdot m$	Electrical resistivity

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\epsilon_L$	%	Elongation at break (longitudinal)

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
Hot working temperature	°C	The temperature at which the plastic-deformed metal recrystallizes during the pressure treatment
annealing temperature	°C	The temperature at which the processes return recrystallization and homogenization of the metal to reduce its hardness for subsequent machining