Spyderco Forums

Jeb wrote: ↑

Wed Sep 03, 2025 9:28 am

I knew that pineapple would really get after that K390...

I kinda like the look of it, FWIW.

I'm jelly. Missed this one!

With the K390 I have been trying to like it lol. Man here in the summer I sweat like a hog and my Police4 really takes it on the chin. It gets down in the porosity of the K390 and you can't clean it all off.

Sterling454 wrote: ↑

Mon Sep 01, 2025 11:37 pm

Bolster wrote: ↑

Mon Sep 01, 2025 3:33 pm

I don't have a MagnaMax mule (yet), but I'm a little hazy on the MagnaMax Mule stats. This is what I have assumed by reading around, can the forum please correct any errors found below?

Mule Rc hardness around 63+?
MagnaMax has CATRA in the 700-750 range?
MagnaMax toughness somewhere in the 7-10 ft lb range?
Corrosion resistance somewhere in the S90V range?

I will gladly be wrong but I'm not aware of any publicized or even informal stats for any of the questions you posed. I've heard MagnaMax likened to "stainless K390", "S110V edge retention with S35VN toughness" and "10V edge retention with double S90V's toughness " but no actual stats, just analogies. I would love to see some actual figures - maybe hardness testing from CBRx or Shawn?

Thanks. I was extrapolating CATRA and toughness from a Larrin post where he'd commented MagnaMax had edge retention closest to K390, and depending on the heat treat, toughness similar to 10V or K390. There was also a TCC graphic posted by Larrin that indicated "MagnaWear" had TCC between 700-750 (same neighborhood as K390, ZDP-189, S110V). Was MagnaMax called MagnaWear for awhile?

Red Leader wrote: ↑

Wed Sep 03, 2025 7:59 am

Here are the results from my pineapple test (overnight):
So far, for the initial test, I am pretty impressed. Salt water dunk next? Burying in the backyard for a week?

Agreed! Very impressive. Thanks for doing this test!

After running just over 3,200 linear feet of double walled cardboard, it wasn't cutting printer paper cleanly anymore (Cedric & Ada standard) so I decided it was time to resharpen. After more time than I care to admit on my Work Sharp Precision Adjust, I have a super keen 17° edge and a newfound desire to upgrade to a TSProf. This Magnamax is no joke - it felt much harder on my diamond abrasives than S90V and 15V to reprofile and make wicked sharp. I've gotta get a resin-bonded stone sharpening system before I go through the next high intensity test

What is the upgraded sharpening system are you looking at? TSProf ? Not sure I am familiar or know this one?

I've been drooling over this one:

https://tsprof.us/collections/k03/produ ... -kit-black

I've got some longer blades and some kitchen knives with sub-10° bevels to maintain and I think this might be just the ticket.

The K4 is also drool worthy but it'll be a while before it's available in the US and it sounds like the price point will fall north of $1,200 if not $1,500

I have looked at that one and it does have some fine points for sure.

Bolster wrote: ↑

Fri Sep 05, 2025 10:56 pm

Sterling454 wrote: ↑

Mon Sep 01, 2025 11:37 pm

Bolster wrote: ↑

Mon Sep 01, 2025 3:33 pm

I don't have a MagnaMax mule (yet), but I'm a little hazy on the MagnaMax Mule stats. This is what I have assumed by reading around, can the forum please correct any errors found below?

Mule Rc hardness around 63+?
MagnaMax has CATRA in the 700-750 range?
MagnaMax toughness somewhere in the 7-10 ft lb range?
Corrosion resistance somewhere in the S90V range?

I will gladly be wrong but I'm not aware of any publicized or even informal stats for any of the questions you posed. I've heard MagnaMax likened to "stainless K390", "S110V edge retention with S35VN toughness" and "10V edge retention with double S90V's toughness " but no actual stats, just analogies. I would love to see some actual figures - maybe hardness testing from CBRx or Shawn?

Thanks. I was extrapolating CATRA and toughness from a Larrin post where he'd commented MagnaMax had edge retention closest to K390, and depending on the heat treat, toughness similar to 10V or K390. There was also a TCC graphic posted by Larrin that indicated "MagnaWear" had TCC between 700-750 (same neighborhood as K390, ZDP-189, S110V). Was MagnaMax called MagnaWear for awhile?

MagnaWear was one of the names that Larrin was kicking around for this steel, yes. Proto-X was the original designation prior to settling on the name and getting the patent.

some corrosion testing here in general discussion.


viewtopic.php?t=98677

made a thread there so that once other models start rolling out we can post results there.

good corrosion resistance but not salt levels of corrosion resistance

holds up fine to some light batoning,the kind of stuff I'd be comfortable doi g with my large, beefy folders like manix xl's / c95's.

getting on some edge retention testing soon. may need to wait until our next order comes in at work so I can gather up more cardboard. if its equal to k390 it'll go through a lot before it stops cutting.

for my sake i'll start with a fairly polished edge. sharpmaker medium or fine rods. then after doing some testing I may try something a little thinner and toothier.

eyeball estimates / sharpmaker use puts the edge on the one I'm testing around 16 degrees on one side, 19 degrees on the other. 15 degree slots didn't work so great but the 20 degree slots hit both sides well.

I have a rope cut test that I've been doing for a few years now, and have some comparable numbers from known "high performers". The test is just like Peat's test from Cedric & Ada, but I use 1/2" Polly rope because I think it's harder.

I tested the factory edge on my MT46P and it did 300 cuts. This is an incredible number for a stainless steel! The highest number for a stainless steel before this one was 120 on the M398 mule, and that was with my 17° edge that normally performs better than factory. I've had Magnacut do 100, and LC200n at 90, but a stainless at 300.... Crazy!

For more context, the K390 stretch with my edge did 250 and the Rex-121 sage with the factory edge did 330... Crazy!

I noticed that the Chromium is 10.65? That isn't stainless level??? I also noticed a .2 Nitrogen addition. Is this Magnacut-vn? Is the nitrogen where it gets its stainlessness?

Crazy!

Browndog82 wrote: ↑

Sat Sep 13, 2025 11:29 am

I have a rope cut test that I've been doing for a few years now, and have some comparable numbers from known "high performers". The test is just like Peat's test from Cedric & Ada, but I use 1/2" Polly rope because I think it's harder.

I tested the factory edge on my MT46P and it did 300 cuts. This is an incredible number for a stainless steel! The highest number for a stainless steel before this one was 120 on the M398 mule, and that was with my 17° edge that normally performs better than factory. I've had Magnacut do 100, and LC200n at 90, but a stainless at 300.... Crazy!

For more context, the K390 stretch with my edge did 250 and the Rex-121 sage with the factory edge did 330... Crazy!

I noticed that the Chromium is 10.65? That isn't stainless level??? I also noticed a .2 Nitrogen addition. Is this Magnacut-vn? Is the nitrogen where it gets its stainlessness?

Crazy!

As i understand it, larrin figured out how to balance the ingredients of the steel so all the chromium goes into solution = contributing towards stainlessness instead of.forming chromium carbides :) same principle as magnacut.

Browndog82 wrote: ↑

Sat Sep 13, 2025 11:29 am

I have a rope cut test that I've been doing for a few years now, and have some comparable numbers from known "high performers". The test is just like Peat's test from Cedric & Ada, but I use 1/2" Polly rope because I think it's harder.

I tested the factory edge on my MT46P and it did 300 cuts. This is an incredible number for a stainless steel! The highest number for a stainless steel before this one was 120 on the M398 mule, and that was with my 17° edge that normally performs better than factory. I've had Magnacut do 100, and LC200n at 90, but a stainless at 300.... Crazy!

For more context, the K390 stretch with my edge did 250 and the Rex-121 sage with the factory edge did 330... Crazy!

I noticed that the Chromium is 10.65? That isn't stainless level??? I also noticed a .2 Nitrogen addition. Is this Magnacut-vn? Is the nitrogen where it gets its stainlessness?

Crazy!

Shawn (BBB) did a nice video explaining this for MagnaCut. You can probably find it on his socials. I suspect MagnaMax does something similar.