Constantan Foil/ CuNi44 / CuNi40 Foil 0.005X50mm Widely Used in Strain-High Quality

• Customization: Available
• Product Type: Foil
• Material: CuNi
• Model NO.: CuNi44 Foil
• Carbon Content: Low Carbon
• PCD: /
• ET: /
• Hole: /
• Surface Treatment: Bright Annealling
• Temperature: Low Temperature
• Sample Free: Available
• Transport Package: Roll
• Specification: T: 0.005mm~3.0mm W: 2mm~250mm
• Trademark: OHMALLOY
• Origin: China
• HS Code: 74082200
• Production Capacity: 500t/Year

Product Description

OhmAlloy49
(Common Name:Constantan CuNi44,NC50.Cuprothal, Alloy 294, Cuprothal 294, Nico, MWS-294, Cupron, Copel, Alloy 45, Neutrology, Advance, CuNi 102, Cu-Ni 44, Konstantan,)
 
OhmAlloy49 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 OhmAlloy49 are temperature-stable potentiometers, industrial rheostats,electric motor starter resistances and strain gauge.
The combination of negligible temperature coefficient and high resistivity makes the alloy particulary suitable for the winding of precision resistors.
OhmAlloy49 is manufactured from electrolytic copper and pure nickel. In finer wire sizes the alloy is designated as OhmAlloy49TC(Thermocouple).Normal composition%

Nickel	44	Manganese	1
Copper	Bal.

 Typical Mechanical properties(1.0mm)

Yield strength	Tensile Strength	Elongation
Mpa	Mpa	%
250	420	30

 Typical Physical properties

Density (g/cm3)	8.9
Electrical resistivity at 20ºC (Ωmm2/m)	0.49
Temperature factor of resistivity(20ºC~600ºC)X10-5/ºC	-6
Conductivity coefficient at 20ºC (WmK)	23
EMF vs Cu(μV/ºC )(0~100ºC )	-43

 
 

Coefficient of thermal expansion
Temperature	Thermal Expansion x10-6/K
20 ºC- 400ºC	15

 

Specific heat capacity
Temperature	20ºC
J/gK	0.41

 

Melting point (ºC)	1280
Max continuous operating temperature in air (ºC)	400
Magnetic properties	non-magnetic

 
Corrosion resistance performance

Alloys	Working In atmosphere at 20ºC	Working at max temperature 200ºC
		Air and oxygen contain gases	gases with Nitrogen	gases with sulfur oxidability	gases with sulfur reductibility	carburization
OhmAlloy49	good	good	good	good	bad	good

 
Style of supply

Alloys Name	Type	Dimension
OhmAlloy49W	Wire	D=0.03mm~8mm
OhmAlloy49R	Ribbon	W=0.4~40	T=0.03~2.9mm
OhmAlloy49S	Strip	W=8~200mm	T=0.1~3.0
OhmAlloy49F	Foil	W=6~120mm	T=0.003~0.1
OhmAlloy49B	Bar	Dia=8~100mm	L=50~1000