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Cuprothal 294/CuNi44 Alloy Resistance Wire/strip

Cuprothal 294/CuNi44 Alloy Resistance Wire/strip

Common Name:CuNi44,NC50.Cuprothal, Alloy 294, Cuprothal 294, Nico, MWS-294, Cupron, Copel, Alloy 45, Neutrology, Advance, CuNi 102, Cu-Ni 44, Konstantan,constantan.)

Common Name:CuNi44,NC50.Cuprothal, Alloy 294, Cuprothal 294, Nico, MWS-294, Cupron, Copel, Alloy 45, Neutrology, Advance, CuNi 102, Cu-Ni 44, Konstantan,constantan.)


CuNi44 is a copper-nickel alloy (Cu56Ni44 alloy) characterized by high electrical resistance, high ductility and good corrosion resistance. It is suitable for use at temperatures up to 400°C 

Typical applications for CuNi44 are temperature-stable potentiometers, industrial rheostats and electric motor starter resistances.

The combination of negligible temperature coefficient and high resistivity makes the alloy particulary suitable for the winding of precision resistors.

CuNi44 is manufactured from electrolytic copper and pure nickel. In finer wire sizes the alloy is designated as CuNi44TC(Thermocouple).


Normal composition%

Nickel

44

Manganese

1

Copper

Bal.



Typical Mechanical properties(1.0mm)

Yield strength

Tensile Strength

Elongation

Mpa

Mpa

%

250

420

25

Typical Physical properties

Density (g/cm3)

8.9

Electrical resistivity at 20℃ (Ωmm2/m)

0.49

Temperature factor of resistivity(20℃~600℃)X10-5/℃

-6

Conductivity coefficient at 20℃ (WmK)

23

EMF vs Cu(μV/℃ )(0~100℃ )

-43

Coefficient of thermal expansion

Temperature

Thermal Expansion x10-6/K

20 ℃- 400℃

15

Specific heat capacity

Temperature

20℃

J/gK

0.41

Melting point (℃)

Max continuous operating temperature in air (℃)

400

Magnetic properties

non-magnetic

Corrosion resistance performance

Alloys

Working In atmosphere at 20℃

Working at max temperature 200℃


Air and oxygen contain gases

gases with Nitrogen

gases with sulfur oxidability

gases with sulfur reductibility

carburization

CuNi44

good

good

good

good

bad

good

Style of supply

Alloys Name

Type

Dimension


CuNi44W Wire

Wire

D=0.03mm~8mm


CuNi44R Ribbon

Ribbon

W=0.4~40

T=0.03~2.9mm

CuNi44S Strip

Strip

W=8~200mm

T=0.1~3.0

CuNi44F Foil

Foil

W=6~120mm

T=0.003~0.1

CuNi44B Bar

Bar

Dia=8~100mm

L=50~1000

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