Perhaps.... But how much force would be needed, this isn't shock testing....shqxk wrote:The same thing can be happen to any steel at the same hardness but the difference is the capability for taking force until it's broken for each steel. S110V will broke much easier than most steel when it come to prying.
And if choices are made by personal experiences rather than theory crafting the user often receives superior performance. At least if one particular benefit comes at a disadvantage.Ankerson wrote:That's why we have choices.
We have to find something that HCV steels are bad at, so we can put them down.Ankerson wrote:Perhaps.... But how much force would be needed, this isn't shock testing....
Different steels for different uses. :)
That's why we have choices.
Agreed. The edge stability concern makes sense, at least on paper. However if Jim's M2 performed at FAR thinner geometry and angles than I would ever run (OEM) where would the "real world" difference be seen? Cutting sheet rock, prying, hitting staples?chuck_roxas45 wrote:We have to find something that HCV steels are bad at, so we can put them down.
My only concern really is sharpening without the proper tools and that doesn't have to be a concern for a bit of time(or use) really.Blerv wrote:Agreed. The edge stability concern makes sense, at least on paper. However if Jim's M2 performed at FAR thinner geometry and angles than I would ever run (OEM) where would the "real world" difference be seen? Cutting sheet rock, prying, hitting staples?
Yep. Reprofiling or fixing a bad chip could be a chore on brown stones. Worse than ZDP-189 and such. A thinned out one like Jim's would be easier and sharpening should be simple.chuck_roxas45 wrote:My only concern really is sharpening without the proper tools and that doesn't have to be a concern for a bit of time(or use) really.
That's so true with the choices we have today.Blerv wrote:Yep. Reprofiling or fixing a bad chip could be a chore on brown stones. Worse than ZDP-189 and such. A thinned out one like Jim's would be easier and sharpening should be simple.
Just gonna be one of those things each person has to personally gauge. If you can't rust VG10, H1 might be overkill. If 110v won't chip and you can sharpen it, 1095 wouldn't offer any benefit with the same test variables. Except bragging about how many robot T-Rex's you could chest stab until the tip theoretically would snap :p
I guess that's because of cost of material and machining. I'm sure a prybar of S110V that's 4mm thick won't be too shabby.mattman wrote:Probably why prybars aren't made with S110V... :-/
Maybe the leftover pieces from broken knives... :pmattman wrote:I would guess that they're just using up scrap pieces?
(Purely a question of curiosity... Apologize in advance for thread derail...)
Hhhhmm what size prybar are we talking about here? I was kinda thinking of keychain prybars. :)mattman wrote:That, too, Chuck, but I wouldn't want to be wailing on it with a hammer like my Stanley wonderbar...
Would have to be doing something very stupid really....Blerv wrote:Agreed. The edge stability concern makes sense, at least on paper. However if Jim's M2 performed at FAR thinner geometry and angles than I would ever run (OEM) where would the "real world" difference be seen? Cutting sheet rock, prying, hitting staples?
Maybe that is a way to describe the result. In engineering terms the softer spine has a lower yield strength and I believe it will have a little more ductility. The way bending stresses work, when a blade is bent sideways the maximum stress will be at the thickest point. At the edge or just behind the edge where the material is thinner, the stresses will be less. At the point of maximum bending stress the steel is softer and will permanently deform, but it will have enough ductility to not fracture. The user will see that the blade is bending and will realize that he shouldn't push the knife any further. If the blade was hardened all the way through, when the point of maximum bending stress reached yield stress it would start to permanently deform but would probably fracture right after that. It would take higher load to reach fracture in this example than it would take to reach yield in the first example, but there would be no warning that the limit was going to be reached.shqxk wrote:The real advantage of differential hardening is, the softer part of the blade will act like a shock absorber when you chop through stuff. Its feel much better than a entirely harden knife. Yet you can also have >60rc edge.
This is an interesting point and I would like to see stress-strain curves of different alloys hardened to this level. I don't think the same thing would happen to steels hardened to lower levels, but maybe they all perform closer to the same at high hardness levels.Ankerson wrote:So apples to apples here, the same thing will happen to any steel at the same hardness range when hardened all the way though at 61+
The hardness in most cases should not be the control variable. The over promotion of hardness for steels in the knife industry is leveraged heavily by the marketing sheets where the promotional steel is compared vs another steel which has a very different microstructure and thus can have very different properties because people assume that nothing is different aside from the hardness. Just look at the properties of 1095 in bainite vs martensite both at very high hardness levels. The strength is similar but the toughness related properties are not.bdblue wrote:nt and I would like to see stress-strain curves of different alloys hardened to this level. I don't think the same thing would happen to steels hardened to lower levels, but maybe they all perform closer to the same at high hardness levels.
