Selection of resistance wire

- Aug 19, 2019-

Commonly used electric resistance wire materials in electric heating pipes are Fe-Cr-Al and Cr20Ni80 electric resistance wires. The iron chrome wire selected by KAWAI is 0Cr25Al5 grade, which has higher melting point than ordinary iron chrome wire and has better service life. The main difference between the two types of resistance wires is that the melting point of 0Cr25Al5 is higher than that of Cr20Ni80, but at higher temperatures, 0Cr25Al5 is more susceptible to oxidation, while Cr20Ni80 can maintain stable performance at high temperatures. Therefore, the resistance wire used in a high temperature state generally uses Cr20Ni80.