Just curious, because I've some badly worn files around that are looking to be repurposed. I seem to remember a discussion somewhere that modern files are hardened by a magnetic induction process (case hardened) using steel that doesn't harden well by more conventional heat and quench methods. As I recall, it was to the effect that any file made in the last 20 years or so was only good for the landfill.

Can someone clarify that for me? While there seems no shortage of old files in garage sales and junk shops, I'd like to recycle a few of my newer ones if possible. I've made file knives in past years with great success, but that was 30 years ago.

:ootd: