CPM MagnaCut – The Next Breakthrough in Knife Steel

Bigfattyt

Gold Member
Joined
Jun 23, 2007
Messages
18,432
Is the .063 too thin for a knife? That is what I ordered but I’m wondering if I should go thicker?

I have a puko out of .07 15n20 that is pretty handy. It could be thinner.

After heat treat, removing decarb, it may be close to. 06 at this point. I keep meaning to. Get my calipers and see what it ended up at.
 

Fixall

Gold Member
Platinum Member
Joined
Mar 26, 2018
Messages
2,651
The standard Morakniv is about .08" thick and has been used as an outdoors knife for decades, just for reference.
 

LX_Emergency

Knifemaker / Craftsman / Service Provider
Joined
Jun 28, 2007
Messages
3,202
Now we just need knife manufacturers to grind their knives thin....
and...we wait and we wait and we wait....
Hey! I resent that remark.....oh wait you mean the large numbers thousands of knives guys...

nevermind carry on.
 
Joined
Sep 10, 2015
Messages
293
Thats some wishful thinking. They just now decided to switch over to s45vn.

They would be wise to rethink this decision.
What's the point to switch to S45VN when MagnaCut is (nearly) here?
According to tests done by Larrin you have only upsides when you compare 61RC S45VN to 62.5RC MagnaCut : Finer carbide structure, 60% more toughness, same edge retention and much better corrosion resistance.
 
Last edited:
Joined
Aug 23, 2020
Messages
506
What about machinability and the ease of the heat treat? The properties more important to makers.
 

Blues

Only Taken Out of the Box for Photos
Staff member
Super Mod
Joined
Oct 2, 1998
Messages
24,781
I certainly hope it is. Innovators deserve to be paid.

Took a month to sink in, eh? (And it's still his, and only his business...imho, of course.)
 
Joined
Feb 28, 2015
Messages
1,084
Took a month to sink in, eh?

This feels like a jab for replying a couple of weeks after the last post. Is that now considered necroposting? I wouldn't have bumped a year old thread for a minor comment but I really hope a couple of weeks isn't a problem.
 

Blues

Only Taken Out of the Box for Photos
Staff member
Super Mod
Joined
Oct 2, 1998
Messages
24,781
This feels like a jab for replying a couple of weeks after the last post. Is that now considered necroposting? I wouldn't have bumped a year old thread for a minor comment but I really hope a couple of weeks isn't a problem.

I think you're being overly sensitive. My post, that you quoted, was addressed to another member who I felt was, (perhaps unintentionally), treading into an area that I feel is a private matter between Larrin and those with whom he engages in business.

Your quoting my remark to discuss "his deserving to be rewarded" was outside of the parameters which my reply addressed.

If you feel a need to take offense...I'm very sorry. Necroposting truly had nothing to do with it.
 
Joined
Jan 31, 2018
Messages
2,337
& fwiw, my question came from my belief in something approaching a meritocracy
...I think most bf members believe that good work should result in a good reward...

I didn't ask Larrin Larrin to give us the break down of what % he might make from magnacut, but I think most bf members would like to know that he does indeed get something for his good work

too often we hear about inventors or developers or creators being robbed

I purchased his book because I know he'll get some of it... and will encourage more excellent writing from him - we all benefit
I feel many of us would like to know if buying a magnacut knife results in supporting his good work also

I certainly hope so, and I expect many of us would like to know as well
 
Joined
Feb 28, 2015
Messages
1,084
If you feel a need to take offense...I'm very sorry. Necroposting truly had nothing to do with it.

I do not feel offended. Thanks for explaining. I should have tried to express the sentiment I felt without quoting your post.
 
Joined
Nov 1, 2020
Messages
24
Ok I will give some unpopular opinions. The best sword steel is 420 with at least 0.35% carbon. Super high toughness and good achievable hardness and of course excellent corrosion resistance. You don’t need wear resistance in a sword and it makes sharpening all of that edge take longer. A stainless 3V could be made, however.

I don’t have that much interest in “nitrogen” steel craze. The definition of nitrogen steel isn’t consistent and nobody seems to understand what nitrogen can and can’t do. We could make a “saltwater” stainless steel without significant amounts of nitrogen.
Dr Larrin
Please oh please make a nitrogen 3V!
I have been a good boy. What can I do to bribe you back to your bat cave and create this new super 3V”N”
 
Joined
Apr 24, 2020
Messages
96
Dr Larrin
Please oh please make a nitrogen 3V!
I have been a good boy. What can I do to bribe you back to your bat cave and create this new super 3V”N”

I would like to see Larrin improve upon Z-Tuff and 3V by pushing the strength-toughness envelope.

30 ft-lbs CVN impact toughness at 64+ HRC. Can it be done?
 

Larrin

Knifemaker / Craftsman / Service Provider
Joined
Jan 17, 2004
Messages
4,280
I would like to see Larrin improve upon Z-Tuff and 3V by pushing the strength-toughness envelope.

30 ft-lbs CVN impact toughness at 64+ HRC. Can it be done?
4140 is around 20 ft-lbs CVN well below 64 Rc. 3V and L6 are single digit ft-lbs when tested with CVN.
 

Larrin

Knifemaker / Craftsman / Service Provider
Joined
Jan 17, 2004
Messages
4,280
Dr Larrin
Please oh please make a nitrogen 3V!
I have been a good boy. What can I do to bribe you back to your bat cave and create this new super 3V”N”
You already quoted me saying that I didn't think nitrogen was necessary to make better steels.
 

unwisefool

Gold Member
Joined
Jan 22, 2007
Messages
6,496
I'd like to see a quantum type steel. Next level technology. Also I like saying the word quantum. Quantum. Quaaantum. Quantum.

Ok, now it sounds weird.
 
Joined
Jan 29, 2016
Messages
5,910
Very impressive balanced steel .

I can only hope this will eventually become more widely available on affordable production knives . :cool: :thumbsup: :thumbsup:
 
Top