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What unique functions do copper-nickel alloys have?

Sources: | Release date: 2019-04-17 | Browsing volume:
Key words:铜镍合金功能
Copper-nickel alloys consist of copper and nickel as the main components. Their resistivity is 2-3 times higher. They have lower resistance temperature coefficient (TCR) and lower thermoelectric potential. Compared with copper, they have longer durability and strong oxidation resistance.

Starting from the first stage of nickel-chromium electric heating wire, some elements such as Ni and Al are put together to obtain a precise resistance material with higher resistance temperature coefficient and thermoelectric potential for copper. With the addition of Al, the volume resistivity is increased by 1.2 times, the grade of nickel-chromium hot wire is grade 1, and the tensile strength is increased by 1.3 times.

Secondary temperature coefficient beta is very small, - 0.03 *10-6/K2, and the resistance temperature curve is almost straight in a wide temperature range. Therefore, the average temperature coefficient is set to be between 23 53 C, but 1 10 - 6 / K. The average temperature coefficient is between 0 100 C, and the temperature coefficient can also be used.

The electromotive force of__to copper is also very small between 1 and 100 C, which is lower than +2 uV/K, and has good stability in many years. If it is used as a precise resistance material, low temperature heat treatment is needed to eliminate the processing deformation, just like the use of manganese steel wire CMW.

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