Zknives has a nice article on this issue, linked below. He takes your position that Chris Reeve runs his steel too soft, but my issue is that hardness is a choice that involves the balance of edge wear and toughness. Knife makers can choose one way or the other, depending on their goals. Their choice may be different than the one you make, but it’s not a mistake – at least not at the Chris Reeve level.
I have an issue with ZT running the 0560CBCF at 59HRc, which I think is way too soft for S110V. ZT chose this hardness because they wanted the stunning visual appeal of a composite blade; and composite blades with copper brazing cannot be run at the temperatures required to bring S110V to higher hardnesses. I don’t agree with ZT’s choice, but the company’s choice was not a mistake, it was their considered choice in a balance between appearance and performance. The knife’s blade is beautiful, and S110V, even run soft, still performs well.
I also had an issue with Benchmade running it’s early CPM M4 too soft: 59HRc. I sent the blade off to a very well known knife maker to bump up the hardness to 64Rc. When I got it back, the blade shattered into three pieces under hand pressure. Softer isn’t always worse. Harder isn't always better. I sent the carnage back to Benchmade and paid to have a new stock blade installed at my expense.
From the Zknives link:
[Re: S30V] For the reference, Crucible representative stated that: if you are not sure what jobs you will ask of the knife (
cutting, prying, picking, chopping, you get the picture) then we recommend HRC 58+/-. If you are sure you only need edge retention (i.e. you know you will only be slicing or carving) then HRC 60+/- is OK. So we think unless you know you are in the latter category, HRC 58 is the best choice.
However CRK choose to use 57-58 HRC then, and later bumped up a point 58-59HRC. The explanation from CRK is that this is suffice for most cutting needs, makes sharpening easier and keeps the blade tough enough to withstand some abuse.
http://zknives.com/knives/folding/hiend/crkssebp3.shtml