FeCrAl wire composition

[Clied Died]

I've read the difference in types of FeCrAl (kanthal) is the amount of aluminum in each one. I can't seem to find any proof of this. It's odd that 4.8%-5.8% can be the main difference when chromium and iron vary in higher numbers.

 

[chefjoosie]

Small differences in composition can change an alloy's properties quite a bit.

As far as why the chromium differences don't change the properties as much, part of it is that different elements have different effects on the alloy. For example a .1% difference in manganese can change the kanthal properties more than a 1% difference in chromium. Also a 1% difference in an element that is only 4-5% of the alloy is a bigger difference than a 2% difference in an element that makes up 20-22%.

 

[Clied Died]

Thank you very much! I've been doing research for an article I'm writing on wire material used for vaping application, so this helps.