Cuprothal 294 Copper Nickel Alloy Wire 0.08mm for Precision Instrument
CuNi alloy Grade: Constantan, CuNi1, CuNi2, CuNi6, CuNi8, CuNi10, CuNi14, CuNi19, CuNi23, CuNi30, CuNi34, CuNi40 (6J40), CuNi44.
Our product are in the form of wire, ribbon, strip, foil.
Constantan (CuNi44)
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
Constantan
Chemical Content, %
| Ni | Mn | Fe | Si | Cu | Other | ROHS Directive |
| Cd | Pb | Hg | Cr |
| 44 | 1.50% | 0.5 | - | Bal | - | ND | ND | ND | ND |
Mechanical Properties
| Max Continuous Service Temp | 400℃ |
| Resisivity at 20℃ | 0.49±5%ohm mm2/m |
| Density | 8.9 g/cm3 |
| Thermal Conductivity | -6(Max) |
| Melting Point | 1280℃ |
| 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 |
Manganin
Chemical Content, %
| Ni | Mn | Fe | Si | Cu | Other | ROHS Directive |
| Cd | Pb | Hg | Cr |
| 2~5 | 11~13 | <0.5 | micro | Bal | - | ND | ND | ND | ND |
Mechanical Properties
| Max Continuous Service Temp | 0-100℃ |
| Resisivity at 20℃ | 0.44±0.04ohm mm2/m |
| Density | 8.4 g/cm3 |
| Thermal Conductivity | 40 KJ/m·h·℃ |
| Temp Coefficient of Resistance at 20 ºC | 0~40α×10-6/ºC |
| Melting Point | 1450℃ |
| Tensile Strength(Hard) | 585 Mpa(min) |
| Tensile Strength,N/mm2 Annealed,Soft | 390-535 |
| Elongation | 6~15% |
| EMF vs Cu, μV/ºC (0~100ºC) | 2(max) |
| Micrographic Structure | austenite |
| Magnetic Property | non |
| Hardness | 200-260HB |
| Micrographic Structure | Ferrite |
| Magnetic Property | Magnetic |
Resistance Alloy- Constantan Sizes / Temper Capabilities
- Condition: Bright, Annealed, Soft
- Wire diameter 0.02mm-1.0mm packing in spool, big than 1.0mm packing in coil
- Rod, Bar diameter 1mm-30mm
- Strip: Thickness 0.01mm-7mm, Width 1mm-280mm
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