L6.
I have a Smatchet made out of L6 that I spent a camping trip beating the hell out of, and came out unscathed. If it was not so heavy, I'd take that Smatchet on more trips.
1095.
This steel has been around forever it seems & it still works just fine.
ATS-34/154CM.
I remember when these steels started becoming popular on production knives. Up till them the average production knife was 440C or 440A. ATS-34, and later 154CM, seemed to be the start of production companies looking at the steels custom makers were using.