The Tru Sharp stainless can be brought up to be sharp enough to shave with that has never been disputed really. The problem is that they lose that shaving edge pretty much on the first cut and go down hill from there.
For someone like me that wood carves a nominal edge holder cuts hard wood for about ten minutes before I notice it is dragging and needing a few strops. I like them to cut longer than that. This is the minimum performance I will except. Any typical Spyderco knife right out of the box will cut hard wood for 20 minutes and some up to about 30 minutes before needing a strop or two to bring the edge back to snuff. D2 steel is pretty much the same way and most of my 1095 and 52100 blades are up there with it also. About 30 to 35 minutes before the blade starts really dragging depending on the type of cuts, the type of wood and just generally speaking. The length of the blade makes a difference also. On softer woods like pine or bass wood you can go for much longer between strops.
Many carvers will say that they only get about 15 to 20 minutes on hardwoods with a good blade and they feel the need to strop. And this is probably true if you are using a small carving knife blade with an inch and a half of useable edge or less. So what I'm referring to here is a folder blade with 2.5" or more of useable cutting edge on it. Some of the longer blades can go for quite a while because you just move to a different spot of the cutting edge to do some work before stropping the edge.
The Case Seahorse Whittler I used on occassion is a beautiful knife. I have carved with it and it does have that surgical stainless steel, or I guess Case also calls it "Tru-Sharp, and it sports that great main blade in that much loved Wharncliff blade shape we carvers just adore. It goes about 5 minutes maybe 7 carving hard woods and needs stropped. The smaller blades are pretty much not even going to last for more than a couple of cuts in hard wood and the whole useable edge is dulled beyond acceptable levels. The edge comes back just fine to shaving again after a few strops in most cases but it lasts about 5 to 7 minutes once again on main blade and quickly disappears on the smaller ones. I can push it further than this but the edge rolls, and it becomes damaged enough that just a few strops are no longer going to do the job to bring the edge back. I tried to give Case stainless the benefit of the doubt when I bought that Whittler. I really did. But these are my experiences with it truthfully. If Case used CV steel in this Whittler it would be in my pocket as a daily whittler and everyday user. But because it is stainless 'surgical' steel it is in my safe with a box full of other old knives I've deemed worthless.
So, in a nut shell summary this 'surgical steel' is simply unacceptable to me a for what I routinely do with my knives. It works for a lot of people though.
Anyway, that is the difference I see carving North American Hardwoods from steel to steel. In my experience a "good" steel will carve on a block of walnut for 30 minutes before the edge needs attention and then it will come right back to the edge it had when you started in about 4 strops maybe 5 per side. That is what I see in my high carbon carving knives in 1095 and 52100 steels and what I have seen in some of my D2 blades.
S30V seems to keep up well with these high carbon blades but the 440C blades I have go for about 20 minutes or so. Not quite as good but still very acceptable though.
Hope that helps.
Note: this a paste from a past post I made on this same subject so if it looks familar it is. Hey! It was easier than having to think.
