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| Color: | Silver |
| Shape: | Strip/Wire/Ribbon/Pipe/Sheet/Bar/Foil |
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Constantan Definition
Resistance alloy with moderate resistivity and low temperature coefficent of resistance with a flat resistance/temperature curve over a wider range than the "manganins". CuNi44 Alloy wire also shows better corrosion resistance than the man ganins. Uses tend to be restricted to ac circuits. CuNi44/ CuNi40 /CuNi45 Constantan Copper Nickel Alloy Wire is also the negative element of the type J thermocouple with Iron being the positive; type J thermocouples are used in heat treating applications. Also, it is the negative element of the type T thermocouple with OFHC Copper the positive; type T thermocouples are used at cryogenic temperatures.
Chemical Content(%) CuNi44
|
Ni |
Mn |
Fe |
Si |
Cu |
Other |
ROHS Directive |
|||
|
Cd |
Pb |
Hg |
Cr |
||||||
|
44 |
1.50% |
0.5 |
- |
Bal |
- |
ND |
ND |
ND |
ND |
Mechanical Properties CuNi44
|
Max Continuous Service Temp |
400 ºC |
|
Resistivity at 20ºC |
0.49 ± 5% ohm*mm2/m |
|
Density |
8.9 g/cm3 |
|
Temperature Coefficient of Resistance |
< -6 ×10-6/ºC |
|
EMF VS Cu (0~100ºC) |
-43 μV/ºC |
|
Melting Point |
1280 ºC |
|
Tensile Strength |
Min 420 Mpa |
|
Elongation |
Min 25% |
|
Micrographic Structure |
Austenite |
|
Magnetic Property |
Non. |
Product features:
1)Excellent anti-oxidation and mechanical strength at high temperature;
2)High resistivity and low temperature coefficient of resistance;
3)Excellent reelability and forming performance;
4)Excellent welding performace
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