CuNi45/CuNi44 Constantan Resistance Copper Nickel Alloy Strip
Constantan
Resistance alloy 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 manganins.
Uses tend to be restricted to ac circuits. Constantan 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.
CuNi45/CuNi44 Constantan Resistance Copper Nickel Alloy Strip
Constantan
Resistance alloy 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 manganins.
Uses tend to be restricted to ac circuits. Constantan 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 |
| 44 | 1.50% | 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 |
Application:
CuNi44 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.
Company profile
Shanghai Tankii Alloy Material Co., Ltd. Focus on the production of
resistance alloy(nichrome Alloy, FeCrAl Alloy, copper nickel alloy,
thermocouple wire, precision alloy and thermal spray alloy in the
form of wire, sheet, tape, strip, rod and plate. We've already got
ISO9001 quality system certificate and approval of 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.
Shanghai Tankii Alloy Material Co., Ltd has accumulated lots of
experiences over 35 years in this field. During these years, more
than 60 management elites and high science and technology talents
were employed. They participated in every walk of the company life,
which make our company keep blooming and invincible in the
competitive market. 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.
Our products, such us nichrome alloy, precision alloy, thermocouple
wire, fecral alloy, copper nickel alloy, thermal spray alloy have
been exported to over 60 countries in the world. We are willing to
establish strong and long-time partnership with our customers. Most
complete range of products dedicated to Resistance, Thermocouple
and Furnace manufacturers Quality with end to end production
control Technical support and Customer Service.
