Excellent Weldability CuNi44 Constantan Resistance Wire

• Customization: Available
• Type: CuNi
• Application: Air Condition or Refrigerator, Water Tube, Water Heater, Oil Cooler Pipe, Rheostats
• Model NO.: Ohmalloy049
• Material: Red Copper
• Shape: Round
• Alloy: Alloy
• Color: Red
• Standard: GB/T
• Density: 8.9
• Resistivity: 0.49
• Elongation: 25
• Tensile Strength: 420 MPa
• Yield Strength: 250 MPa
• Melting Point: 1280 C
• Operating Temperature: 400 C
• Transport Package: Spool
• Specification: D=0.03mm~8mm
• Trademark: Ohmalloy
• Origin: Shanghai
• HS Code: 7408290000
• Production Capacity: 80000 Kilograms Per Week

Product Description

Constantan( Ohmalloy 049)  
(Common Name: CuNi45, NC50.Cuprothal, Alloy 294, Cuprothal 294, Nico, MWS-294, Cupron, Copel, Alloy 45, Neutrology, Advance, CuNi 102, Cu-Ni 44, Konstantan,constantan.)

OhmAlloy049 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 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.
OhmAlloy049 is manufactured from electrolytic copper and pure nickel. In finer wire sizes the alloy is designated as OhmAlloy49TC(Thermocouple).

Normal composition%

Nickel	45	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 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
OhmAlloy049	good	good	good	good	bad	good

Style of supply

Alloys Name	Type	Dimension
OhmAlloy049W	Wire	D=0.03mm~8mm
OhmAlloy049R	Ribbon	W=0.4~40	T=0.03~2.9mm
OhmAlloy049S	Strip	W=8~200mm	T=0.1~3.0
OhmAlloy049F	Foil	W=6~120mm	T=0.003~0.1
OhmAlloy049B	Bar	Dia=8~100mm	L=50~1000

The thermocouple alloy wires with different varieties and specifications of our company can be applied in all kinds of thermocouples, the temperature ranges from -270ºC to 1800ºC. The thermocouple alloy wires have excellent performance and are extensively used in the temperature measurement and control in different fields, such as metallurgy, chemical industry, petroleum industry, machinery-electric industry, energy industry, agriculture and military industry. Our products conform to the standards of IEC584 -1and IEC-2 and ANSI96-1.

Characteristics:

 Excellent thermoelectricity, excellent linear relationship between thermoelectrical potential and the temperature.
Excellent thermoelectrical stability, high accuracy.

Main technical data:
Thermocouple variety, index and temperature measurement range.