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Constantan is a metal alloy made of 45 percent nickel and 55 percent copper. Constantan is the oldest, and still the most widely used. Constantan has the best combination of overall properties needed for many strain gauge applications. Constantan can be processed for self-temperature compensation to match different thermal expansion coefficient of test materials.

Constantan wire has been widely used mainly in electrical and instruments and other equipment that can take advantage of the unusual physical properties. If you want to get it, now, there has been an online store that offers Constantan wire. You can visit the site http://www.evek.biz, to obtain more complete information.