Thermocouple Alloys: Chromel KPX, Alumel KMX, Iron JPX & Constantan JNX
At National Electronic Alloys, we offer four different types of thermocouple alloys: Chromel KPX, Alumel KMX, Iron JPX & Constantan JNX. These alloys are commonly used as temperature measuring devices. In the form of metal wires, they are connected at both ends and often applied to diesel engines, kilns, and gas turbine exhausts. Sometimes, they will be used in thermostats and as flame sensors appliances that are powered by gas.
Chromel, made mostly of nickel with some chromium, is used with Alumel. Alumel is used in conjunction with Chromel. Like Chromel, Alumel mostly contains nickel in addition to chromium (3%), aluminum (2%), silicon (1%). Constantan gets paired with iron, copper, and Chromel. It has high electrical resistivity and contains copper and nickel. Iron has a great deal of magnetic properties and is heat and corrosion resistant.