Konstantan / CUNi44 Round Wire / Flat Wire Used For Thermal
Overload Relay
Product Description
Of all modern strain gauge alloys, constantan is the oldest, and still the most widely used.
This situation reflects the fact that constantan has the best
overall combination of properties needed for many strain gauge
applications.
In 1887, Edward Weston discovered that metals can have a negative
temperature coefficient of resistance, inventing what he called his
"Alloy No. 2." It was produced in Germany where it was renamed
"Konstantan"
Constantan is a proprietary name for a copper–nickel alloy also
known as Eureka, Advance, and Ferry. It usually consists of 55%
copper and 45% nickel.
Its main feature is the low thermal variation of its resistivity,
which is constant over a wide range of temperatures.
Other alloys with similarly low temperature coefficients are known,
such as manganin (Cu [86%] / Mn [12%] / Ni [2%] ).
Copper nickel alloy Wire with moderate resistivity and low
temperature coefficent of resistance with a flat
resistance/temperature curve over a wider range than the
"manganins". it also shows better corrosion resistance, and welding
performance. It always used for thermal overload relay, low-voltage relay etc.
Konstantan / CUNi44 Round Wire / Flat Wire Used For Thermal
Overload Relay
Chemical Content, %
Ni |
Mn |
Fe |
Si |
Cu |
Other |
ROHS Directive |
Cd |
Pb |
Hg |
Cr |
| 44 | 1.0 | - | - | Bal | - | ND | ND | ND |
ND
|
Mechanical Properties
Max Continuous Service Temp |
400ºC |
Resisivity at 20ºC |
0.49±10%ohm mm2/m |
Density |
8.9 g/cm3 |
Thermal Conductivity |
<-6 |
Melting Point |
1280ºC |
Tensile Strength,N/mm2 Annealed,Soft | ≥420 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
|
Konstantan / CUNi44 Round Wire / Flat Wire Used For Thermal
Overload Relay
Our advantages:
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
Product picture:
Company Information
Shanghai Tankii Alloy Material Co.,Ltd. is specialized in
production of Ni-Cr Alloy, Cu-Ni Alloy, Fechral, thermocouple wire,
pure nickel and other precision alloy materials in the form of
wire, strip, rod, bar and plate.
We've already got ISO9001 quality system certification and ISO14001
environmental protection system.
We own a complete set of advanced production flow of refining, cold
reduction, drawing and heat treating etc. We also proudly have
independent R&D capacity.
Based on the principle of "first quality, sincere service", our
managing ideology is pursuing technology innovation and creating
the top brand in the alloy field. We persist in Quality - the
foundation of the survival. It is our forever ideology to serve you
with full heart and soul. We committed to provide customers all
over the world with high-quality, competitive products and perfect
service.
