Product Description
Cuni25 (B25) /C71300/ Cw350h Cupronickel Alloy Strip (CuNi25/C71300)Material: CuNi10Fe, CuNi19, CuNi23, CuNi25, CuNi30MnFe, CuNi30Fe2Mn2 in form of strip/plate
Resistance material: CuNi1, CuNi2, CuNi2Si, CuNi4, CuNi6, CuNi10, CuNi23Mn, CuNi25, CuNi30Mn, CuNi44,
CuMn12Ni2 in form of wire/ribbon and strip
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),
General Description
Due to has high tensile strength and increased resistivity values, copper nickel alloy wires are the first choice for applications as resistance wires. With the different nickel amount in this product range, the characteristics of the wire can be chosen according to your requirements. Copper nickel alloy wires are available as bare wire, or enamelled wire with any insulation and self-bonding enamel. Furthermore, litz wire made of enamelled copper nickel alloy wire are available.
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.