Bright Constantan CuNi44Mn Copper Nickel Electric Resistance Heating Wire

• Product Type: Wire
• Material: CuNi
• Carbon Content: Low Carbon
• PCD: NONE
• ET: N/A
• Hole: N/A
• Model NO.: Constantan
• Sample: Free
• standard: ASTM/GB
• colour: silver white
• Surface: Bright
• Diameter: 0.02-10mm
• Ni: 44%
• Packing: Standard
• Shape: Strip
• OEM: YES
• Condition: soft / hard
• Transport Package: Waterproof Paper, Wooden Case
• Specification: RoHS, SGS, ISO 9001: 2008
• Trademark: TANKII
• Origin: China
• HS Code: 7505220000
• Production Capacity: 5000 Ton/Yearton/Year

Product Description

Bright Constantan  CuNi44Mn Copper Nickel Electric Resistance Heating Wire

onstantan As a big manufacturer and exporter in China on the line of electric resistance alloy,
we can supply all kinds of electric resistance alloy wire and strips (resistance steel wire and
strips),
Material: CuNi1, CuNi2, CuNi6, CuNi8, CuNi14, CuNi19, CuNi23, CuNi30, CuNi34, CuNi44.

1. CuNi44, also called Constantan, has a very low temperature coefficient, high electrical
resistance, high ductility and non-corroding properties. It is suitable for use at temperatures
up to 600° C (1110° F). As a very malleable, very ductile alloy, it has a very good resistance
to oxidation.

The alloy is non-magnetic. It is suitable for electrical resistors, potentiometers, heating wires,
heating cables and mats. Ribbons are used for heating of bimetals. Another field of
application is manufacturing of thermocouples because it develops a high electromotive
force (EMF) in association with others metals.

2. Chemical Composition
Alloy Ni% Mn% Fe% Cu%
CuNi44 43 Max 0.5 - Bal.

3. Products and services
1. Pass: ISO9001 certification;
2. Fine after-sale services;
3. Small order accepted;
4. Samples available;

Chemical Content, %

Ni	Mn	Fe	Si	Cu	Other	ROHS Directive
						Cd	Pb	Hg	Cr
44	1%	0.5	-	Bal	-	ND	ND	ND	ND

 
Mechanical Properties

Max Continuous Service Temp	400ºC
Resisivity at 20ºC	0.49±5%ohm mm2/m
Density	8.9 g/cm3
Thermal Conductivity	-6(Max)
Melting Point	1280ºC
Tensile Strength,N/mm2   Annealed,Soft	340~535 Mpa
Tensile Strength,N/mm3   Cold Rolled	680~1070 Mpa
Elongation(anneal)	25%(Min)
Elongation(cold rolled)	≥Min)2%(Min)
EMF vs Cu, μV/ºC (0~100ºC)	-43
Micrographic Structure	austenite
Magnetic Property	Non

 
Application of Constantan
Constantan is a copper-nickel alloy that contains specific minor amounts of additional
elements to achieve precise values for the temperature coefficient of resistivity. Careful
control of melting and conversion practices results in a very low level of pinholes at
ultra-thin thicknesses. The alloy is used extensively for foil resistors and strain gauges.