0.02x100mm Constantan strip Copper Nickel Alloy CuNi44 foil
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 |
main specifications and main technical parameter of resistance alloy constantan wire
| main property type |
|
NC003 Cuni1 |
NC005 CuNI2 |
NC010 CuNI6 |
NC015 CuNI10 |
NC025 CuNi19 |
NC030 CuNi23 |
NC035 CuNi30 |
NC040 CuNi34 |
NC050 CuNI44 |
| main chemical composition |
Ni |
1 |
2 |
6 |
10 |
19 |
23 |
30 |
34 |
44 |
|
MN |
/ |
/ |
/ |
/ |
0.5 |
0.5 |
1.0 |
1.0 |
1.0 |
|
CU |
rest |
rest |
rest |
rest |
rest |
rest |
rest |
rest |
rest |
| max working temperature |
|
/ |
200 |
220 |
250 |
300 |
300 |
350 |
350 |
400 |
| density g/cm3 |
|
8.9 |
8.9 |
8.9 |
8.9 |
8.9 |
8.9 |
8.9 |
8.9 |
8.9 |
| resistivity at 20 °c |
|
0.03
±10% |
0.05
±10% |
0.10
±10% |
0.15
±10% |
0.25
±5% |
0.30
±5% |
0.35
±5% |
0.40
±5% |
0.49
±5% |
| temperature coefficient of resistance |
|
<100 |
<120 |
<60 |
<50 |
<25 |
<16 |
<10 |
-0 |
<-6 |
| tensile strength mpa |
|
>210 |
>220 |
>250 |
>290 |
>340 |
>350 |
>400 |
>400 |
>420 |
| elongation |
|
>25 |
>25 |
>25 |
>25 |
>25 |
>25 |
>25 |
>25 |
>25 |
| melting point °c |
|
1085 |
1090 |
1095 |
1100 |
1135 |
1150 |
1170 |
1180 |
1280 |
| coefficient of conductivity |
|
145 |
130 |
92 |
59 |
38 |
33 |
27 |
25 |
23 |
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.