Copper Nickel Alloys
Model No.: CuNi2
Those are alloys of chemical composition copper + nickel with addition of manganese with a low resistivity (from 231.5 to 23.6 Ohm. Mm2/ft).
The most known, CuNi 44 (also called Constantan) presents the advantage of a very low temperature coefficient.
Their advantages are the following:
Very good resistance to corrosion
Very good malleability
Very good solderability
Chemical Composition and Main Property of Cu-Ni Low Resistance Alloy |
Properties\Grade |
CuNi1 |
CuNi2 |
CuNi6 |
CuNi8 |
CuMn3 |
CuNi10 |
Main Chemical Composition |
Ni |
1 |
2 |
6 |
8 |
_ |
10 |
Mn |
_ |
_ |
_ |
_ |
3 |
_ |
Cu |
Bal |
Bal |
Bal |
Bal |
Bal |
Bal |
Max Continuous Service Temperature(ºC) |
200 |
200 |
200 |
250 |
200 |
250 |
Resisivity at 20ºC (μΩ·m) |
0.03 |
0.05 |
0.1 |
0.12 |
0.12 |
0.15 |
Density(g/cm³) |
8.9 |
8.9 |
8.9 |
8.9 |
8.8 |
8.9 |
Thermal Conductivity(α × 10-6ºC) |
< 100 |
< 120 |
< 60 |
< 57 |
< 38 |
< 50 |
Tensile Strength(Mpa) |
≥ 210 |
≥ 220 |
≥ 250 |
≥ 270 |
≥ 290 |
≥ 290 |
EMF vs Cu(μV/ºC)(0~1000ºC) |
-8 |
-12 |
-12 |
-22 |
_ |
-25 |
Approximate Melting Point(ºC) |
1085 |
1090 |
1095 |
1097 |
1050 |
1100 |
Micrographic Structure |
austenite |
austenite |
austenite |
austenite |
austenite |
austenite |
Magnetic Property |
non |
non |
non |
non |
non |
non |
|
Properties\Grade |
CuNi14 |
CuNi19 |
CuNi23 |
CuNi30 |
CuNi34 |
CuNi44 |
Main Chemical Composition |
Ni |
14 |
19 |
23 |
30 |
34 |
44 |
Mn |
0.3 |
0.5 |
0.5 |
1 |
1 |
1 |
Cu |
Bal |
Bal |
Bal |
Bal |
Bal |
Bal |
Max Continuous Service Temperature(ºC) |
300 |
300 |
300 |
350 |
350 |
400 |
Resisivity at 20ºC (μΩ·m) |
0.2 |
0.25 |
0.3 |
0.35 |
0.4 |
0.49 |
Density(g/cm³) |
8.9 |
8.9 |
8.9 |
8.9 |
8.9 |
8.9 |
Thermal Conductivity(α × 10-6ºC) |
< 30 |
< 25 |
< 16 |
< 10 |
< 0 |
< -6 |
Tensile Strength(Mpa) |
≥ 310 |
≥ 340 |
≥ 350 |
≥ 400 |
≥ 400 |
≥ 420 |
EMF vs Cu(μV/ºC)(0~1000ºC) |
-28 |
-32 |
-34 |
-37 |
-39 |
-43 |
Approximate Melting Point(ºC) |
1115 |
1135 |
1150 |
1170 |
1180 |
1280 |
Micrographic Structure |
austenite |
austenite |
austenite |
austenite |
austenite |
austenite |
Magnetic Property |
non |
non |
non |
non |
non |
non |