Product Description
Constantan Wire with moderate resistivity and low temperature
coefficent of resistance with a flat resistance/temperature curve
over a wider range than the "manganins". Constantan also shows
better corrosion resistance than the man ganins. Uses tend to be
restricted to ac circuits.
Constantan 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, %
Ni |
Mn |
Fe |
Si |
Cu |
Other |
ROHS Directive |
Cd |
Pb |
Hg |
Cr |
40 |
1.50% |
0.5 |
- |
Bal |
- |
ND |
ND |
ND |
ND |
Mechanical Properties
Max Continuous Service Temp |
400ºC |
Resisivity at 20ºC |
0.48±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 |
Our Services
a) We can provide high quality material, excellent design, precise
manufacturing,complete specifications, considerate and integrity
serivices.
b) We can provide all kinds of electric heating alloy material and
elements, including customized products.
c) We can provide a complete solution for you.
d) OEM service can be provided.
e) Product selection
f) Process optimization
g) New product development
