with repeated straining, P alloy is not ordinarily recommended for cyclic strain applications. P alloy is available with S-T-C numbers of 08 and 40 for use on metals and plastics, respectively. Physical properties Temperature measurement Constantan is also used to form thermocouples with wires made of iron, copper, or chromel. It has an extraordinarily strong negative Seebeck coefficient above 0 degrees Celsius, leading to a good temperature sensitivity. References Bibliography External links National Pollutant Inventory - Copper and compounds fact sheet Copper alloys Electric heating Nickel alloys