Ya know, as much of a knife nut as I am, I don't know much of anything about the different steels.
My current EDC is a Bali-Song. Not any run of the mill butterfly knife...
Read the history section of Banchmade.
The Bali-Song brand (as I'm sure some of you know), was the startup brand by the founder of Benchmade, which later became Pacific cutlery, which then moved (Oregon I guess) and became Benchmade.
It's by far the best pocket knife I've ever carried, in regards to ease of use and carry, edge retention, and WARRANTY as it's still covered, even though it was likely built in the 70's and the company has undergone very significant changes (I called and verified warranty personally).
And I don't even know what kind of steel it is. The blade is marked with the Bali-Song trademark, made in USA, and the patent number, but not the type of steel used as many are.