Edge Angle vs Knife Steel - level on comparable edge strength by adjusting edge angle - to determine edge retention

First, sorry for the Larry vs Larrin - I got all your books but just missed it.

So which steel would be the most promising for maximum edge stability? Would CPM-3V be a good candidate - Very low and small carbides - great toughness - only thing I wonder is how much the lower hardness could be an issue?

So using napkin math:
CPM-3V: 430mm on edge retention
S90V: 780mm -- s90V is 80% better.

Looking at edge angle, as an example taking a 35 degree to 25 degrees takes edge retention according to Larrin's post from 390mm to 700mm that's also 80% better (not sure what steel that was though).

So if edge stability of 25 degree CPM-3V were comparable to 35 degree s90V - maybe 3V edge retention is the same or better as S90V's while maintaining similar edge stability - but providing higher toughness.

Now if Magnacut could match edge stability at 25 degree to that of S90V at 35 degrees - that would fix the lower corrosion resistance of 3V and deliver the holy grail of toughness, highest edge retention (through more acute angle) and highest corrosion resistance. Adding 80% edge retention to Magnacut - would put it from 540mm to 972mm - that blows pretty much everything out of the water.

As said all just napkin math and lots of variables that prob influence all that. The question remains if Edge Retention can be conquered with superior edge stability and more acute angles...

Now ChatGPT thinks - that 3V and Magnacut both should have better edge stability at 25 degree than S90V at 35 degrees. ChatGPT's suggestions for Steels with best edge stability is CPM-3V CPM-M4 and razor steel AEB-L - but then again ChatGPT often just makes stuff up what people want to hear ;-)
 
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mobile1mobile1 said:
First, sorry for the Larry vs Larrin - I got all your books but just missed it.

So which steel would be the most promising for maximum edge stability? Would CPM-3V be a good candidate - Very low and small carbides - great toughness - only thing I wonder is how much the lower hardness could be an issue?

So using napkin math:
CPM-3V: 430mm on edge retention
S90V: 780mm -- s90V is 80% better.

Looking at edge angle, as an example taking a 35 degree to 25 degrees takes edge retention according to Larrin's post from 390mm to 700mm that's also 80% better (not sure what steel that was though).

So if edge stability of 25 degree CPM-3V were comparable to 35 degree s90V - maybe 3V edge retention is the same or better as S90V's while maintaining similar edge stability - but providing higher toughness.

Now if Magnacut could match edge stability at 25 degree to that of S90V at 35 degrees - that would fix the lower corrosion resistance of 3V and deliver the holy grail of toughness, highest edge retention (through more acute angle) and highest corrosion resistance. Adding 80% edge retention to Magnacut - would put it from 540mm to 972mm - that blows pretty much everything out of the water.

As said all just napkin math and lots of variables that prob influence all that. The question remains if Edge Retention can be conquered with superior edge stability and more acute angles...

Now ChatGPT thinks - that 3V and Magnacut both should have better edge stability at 25 degree than S90V at 35 degrees. ChatGPT's suggestions for Steels with best edge stability is CPM-3V CPM-M4 and razor steel AEB-L - but then again ChatGPT often just makes stuff up what people want to hear ;-)
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What you are asking is extremely complicated. I don't think you are going to get any answers here, there are just way too many variables.

It would be very interesting to do some testing of what you are asking, but it would be prohibitively difficult(money and time etc.) to achieve any meaningful results.

Good luck to you if you decide to go down this road.
 
Asking ChatGPT is completely pointless. What I recommend is you take your favorite knife, sharpen it to a more acute angle, and start cutting with it. If it chips or rolls then go a bit more obtuse.
 
Application is important.
I did This about a month ago...... Very thin, delicate blade.
Cruwear, best heat treatment around. Optimized, Cryo, yadda yadda yadda.

What's your favorite steel?

For what? I have a Cold Steel folder in CTS-XHP that performed very well for me, but I wouldn't want that steel on an ax head. My Becker BK 9 is made of 0170-6C, and it performs beautifully for processing firewood, you can beat on it all day, bend it in unnatural angle, and it always come back...
www.bladeforums.com www.bladeforums.com

Taking what basiclly was a kitchen knife and trying to pound it through Hard, sappy pine knots is just plain Stupid! Really Stupid.
 
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