Kknives Switzerland S390 and M390 edge retention testing, what is a custom heat treat capable of?

Published: 4 years ago

This is the first of the test blades from Roman, Kknives Switzerland run with a coarse edge. 68 hrc S390, 66 hrc S390 which is a failed experiment and 62 hrc M390. These will also be run with a polished edge to see which works better. The 2 S390 will be compared and the 62 hrc M390 compared to the best M390 so far the Spyderco PM2 62 hrc.

Kknives Switzerland YouTube channel
https://www.youtube.com/channel/UCv7WhIE11ClB9BiaJWOJZRg

Kknives_switzerland Instagram
https://instagram.com/kknives_switzerland?igshid=1vrdhfgx28skt

Edge retention testing data sheets
https://docs.google.com/spreadsheets/d/1PzXZEuyMtOMoSDhyFUfDNV9MNbztMEvZ3OgRa6yT7QU/edit?usp=drivesdk

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