Target Hardness for O-1

[pastormarty]

I am going to make a 7" blade, 3/16" thick knife in O-1 - essentially a BK7 with custom ergonomics in O-1 and FFG. Assuming I have my edge geometry right, how hard can I temper the O-1. I will send it off for professional heat treat.

 

[Willie71]

O1 shines at Rc61/62.