Chromel-Alumel

The alloys used in making Chromel® Alumel® thermocouple wires. Chromel is an alloy of nickel and chrome plus nine other elements. Alumel is an alloy containing nickel manganese, aluminum, silicon and nine other elements. Chromel is the positive wire; Alumel is the negative. Chromel and Alumel are registered trademarks of the Hoskins Mfg. Co.