The "Ask Nathan a Question" Thread

Is a DE-UF2 and a DEF the same knife. I’ve checked multiple pics and threads but still unsure. Shit, maybe I’m just drunk !🤪 Seriously, please chime in. Thank you !
 
EMCEE said:
Is a DE-UF2 and a DEF the same knife. I’ve checked multiple pics and threads but still unsure. Shit, maybe I’m just drunk !🤪 Seriously, please chime in. Thank you !
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Don't ask Nathan, he just makes the knives, he can't keep all the names straight. There are as follows......

DE UF - These are rare, ask me how I know. It was a double edged grind on an otherwise unmodified original UF

DEF1 - Double Edged Fighter based on a modified UF1 design

DEF2 - Double Edged Fighter based on a modified UF2 design(this is what you bought today)
 
Grenock said:
Don't ask Nathan, he just makes the knives, he can't keep all the names straight. There are as follows......

DE UF - These are rare, ask me how I know. It was a double edged grind on an otherwise unmodified original UF

DEF1 - Double Edged Fighter based on a modified UF1 design

DEF2 - Double Edged Fighter based on a modified UF2 design(this is what you bought today)
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Brother, I really appreciate your SPECIFIC response on this ! Have a wonderful evening.
 
yoko said:
Grenock Grenock is one of the OGs here !
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I have great respect for OG’s and all sincere members of this amazing community. Funny thing is, my whole life, sharp and shiny things have been one of my greatest passions. Most folks don’t get that.
Point being, finding a group of like-minded and apparently good people that share the same passion for such a phenomenal brand of “sharp shiny things”, absolutely puts a smile on my ugly mug ! Good night all, and thank you !
 
Nathan the Machinist said:
Comparing Magna Cut to CPM 4V at the same hardness, the 4V was noticeably more durable, but had the same failure mode. Optimized 3V at the same hardness was considerably more durable than either and did not fail in a brittle fashion but took a dent rather than a fracture, after about three times more hits than the 4V and about six times more hits than the Magna cut. (I'm sorry, that isn't very scientifical, but I did not do this test for you or for publication, I did it for my own personal experience)

If I had to stake my life on it, or did not want to be bothered with nuisance corrosion, it would be Delta 3V all the way.

For a competition chopper, 4V. No question. (Those knuckleheads over on that other thread that are arguing about who designed what comp chopper and they're both talking about using 3V for a comp chopper, obviously don't know very much about comp choppers.)

For an application where I want gross edge stability similar to 4V and fantastic corrosion resistance, Magna cut. It's not exceptionally tough but I think it's still more durable than most stainless steels.

I think there is some potential in Cruwear that I have not yet tapped.
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That is interesting.

When you said you tested the 3V,4V and MagnaCut at same hardness, is that hardness optimized for 3V (i.e. 60-61) or for 4V and Magnacut which is 63+? As you said 3V got dent rather than a fracture makes me think that you tested them all at 60-61?

I certainly expect 3V to be more durable than 4V and MagnaCut at 60-61, but according to Larin's work 4V should have better toughness than 3V once the hardness goes beyond 61. I think I read it from several sources that the toughness of 3V nosedives after 61, whereas 4V and MagnaCut remains relatively less affected. I do not know what the reason is, I was expecting 3V to be more tougher than 4V regardless the hardness but it seems that is not the case. Probably the microstructure changes considerable once 3V goes over 61.
 
unwisefool said:
Someone school me on what makes Cruwear good compared to say magnacut or 3v.
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To my knowledge, CruWear is tougher than 3V once the hardness goes beyond 61. I believe CruWear is noticeably tougher than 3V at 61.5-62.5 HRC which is the sweet spot for CruWear. CruWear has similar stain resistance to 3V perhaps little bit less with considerable increased wear resistance.

Also, many maker says that with CruWear it is much easier to get a good heat treat compared with 3V, but probably that is irrelevant for CPK knives.
 
murat1983 said:
To my knowledge, CruWear is tougher than 3V once the hardness goes beyond 61. I believe CruWear is noticeably tougher than 3V at 61.5-62.5 HRC which is the sweet spot for CruWear. CruWear has similar stain resistance to 3V perhaps little bit less with considerable increased wear resistance.

Also, many maker says that with CruWear it is much easier to get a good heat treat compared with 3V, but probably that is irrelevant for CPK knives.
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I think it is unlikely that the comparison regarding stain resistance (at least) accounts for the Delta protocol.
 
Mark4444 said:
What are your thoughts on DLC coatings?
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#notnathan
I think this has been asked before and there is a problem with dlc/pvd coatings and delta 3v heat treat. Traditional pvd coatings are applied at 500+ F temps which would ruin the magic. I have read about newer methods that are done at lower temps but are not widely available.
 
Cap’n Smudge said:
#notnathan
I think this has been asked before and there is a problem with dlc/pvd coatings and delta 3v heat treat. Traditional pvd coatings are applied at 500+ F temps which would ruin the magic. I have read about newer methods that are done at lower temps but are not widely available.
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Plus, I don't like how they feel to the touch. Not kidding. :)
 
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