M398 Steel Testing – Edge Retention, Toughness, and More

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Larrin
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Re: M398 Steel Testing – Edge Retention, Toughness, and More

Postby Larrin » Wed Oct 28, 2020 11:00 am

sal wrote:
Wed Oct 28, 2020 8:30 am
Thanx Larrin,

Very informative, as usual.

FYI, we have almost 5,000 lbs coming in different thicknesses.

sal
I hope it works out well!
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sal
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Re: M398 Steel Testing – Edge Retention, Toughness, and More

Postby sal » Wed Oct 28, 2020 11:05 am

Hi Larrin,

We'll see? The only real way to "know" a blade steel is to use it in "Real-World-Testing". While many don't care, there seems to be a growing number of Blade Afi's that do.

sal

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Re: M398 Steel Testing – Edge Retention, Toughness, and More

Postby The Meat man » Wed Oct 28, 2020 11:23 am

sal wrote:
Wed Oct 28, 2020 8:30 am
Thanx Larrin,

Very informative, as usual.

FYI, we have almost 5,000 lbs coming in different thicknesses.

sal
5,000 lbs of M398?? Wow that is a lot!! :eek:
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Re: M398 Steel Testing – Edge Retention, Toughness, and More

Postby Bill1170 » Wed Oct 28, 2020 2:16 pm

5000 pounds! Spyderco must truly think this alloy has potential. I’m curious to see what they do with it.

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legOFwhat?
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Re: M398 Steel Testing – Edge Retention, Toughness, and More

Postby legOFwhat? » Thu Oct 29, 2020 6:02 am

Tucson Tom wrote:
Tue Oct 27, 2020 9:17 am
TomAiello wrote:
Mon Oct 26, 2020 7:35 pm
We definitely need an M398 Mule. :)
I was feeling relieved to see that this was a steel I could simply not get interested in. Until this comment came along .... :rolleyes:
Did somone say mule?
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:D
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Hebrews 13:6 So we may boldly say: “The Lord is my helper; I will not fear. What can man do to me?”

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JRinFL
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Re: M398 Steel Testing – Edge Retention, Toughness, and More

Postby JRinFL » Thu Oct 29, 2020 7:19 am

Well, based on Larrin's assessment, I won't be rushing out to get a knife in this steel. I'll withhold final judgment until actual knifes are made and tested, however.
Used to be JR in CT with a much earlier join date. :rolleyes: :spyder: Native in 440v was my gateway Spyderco! :spyder: Wharnie for the whin! Friends call me Jim. As do my foes.

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Re: M398 Steel Testing – Edge Retention, Toughness, and More

Postby DDK » Fri Oct 30, 2020 1:03 am

So if I read correctly, at 1 point higher on the HRC scale, s125v is barely outdone by m398 in toughness, while holding an edge for reasonably longer. I feel like at that higher end wouldn't more folks be interested in s125v? Also with lower carbide volume, it may be less tough, bit perhaps it will have better edge stability?

DDK
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Re: M398 Steel Testing – Edge Retention, Toughness, and More

Postby DDK » Fri Oct 30, 2020 1:06 am

At any rate, cpm-15v FTW 👹

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Re: M398 Steel Testing – Edge Retention, Toughness, and More

Postby JD Spydo » Fri Oct 30, 2020 9:50 am

Bill1170 wrote:
Wed Oct 28, 2020 2:16 pm
5000 pounds! Spyderco must truly think this alloy has potential. I’m curious to see what they do with it.
I'm also very curious as to how it performs in full SE. I was pleasantly surprised when a good friend of mine showed me how good XHP was in full SE with two Cold Steel SE folders he got. I found it similar to 440V in SE and that steel has been one of my favorite SE steels for some time now.

It sounds to me like it might be a good steel for fixed blades in SE & PE both. But like Sal Said until you test in real world cutting jobs you never know until you do. But I've got a gut feeling that it would be another good SE blade steel.

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Larrin
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Re: M398 Steel Testing – Edge Retention, Toughness, and More

Postby Larrin » Fri Oct 30, 2020 10:31 am

DDK wrote:
Fri Oct 30, 2020 1:03 am
So if I read correctly, at 1 point higher on the HRC scale, s125v is barely outdone by m398 in toughness, while holding an edge for reasonably longer. I feel like at that higher end wouldn't more folks be interested in s125v? Also with lower carbide volume, it may be less tough, bit perhaps it will have better edge stability?
S125V does not have more carbide volume than M398, it has a little bit less, hence why the S125V is a bit tougher when compensating for hardness (along with a bit smaller carbides). S125V is better for toughness-edge retention but worse for corrosion resistance. The M398 is probably also easier to sharpen when using aluminum oxide or ceramic abrasives. S90V has only slightly less edge retention than M398 while being significantly tougher.
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DDK
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Re: M398 Steel Testing – Edge Retention, Toughness, and More

Postby DDK » Fri Oct 30, 2020 5:52 pm

Larrin wrote:
Fri Oct 30, 2020 10:31 am
DDK wrote:
Fri Oct 30, 2020 1:03 am
So if I read correctly, at 1 point higher on the HRC scale, s125v is barely outdone by m398 in toughness, while holding an edge for reasonably longer. I feel like at that higher end wouldn't more folks be interested in s125v? Also with lower carbide volume, it may be less tough, bit perhaps it will have better edge stability?
S125V does not have more carbide volume than M398, it has a little bit less, hence why the S125V is a bit tougher when compensating for hardness (along with a bit smaller carbides). S125V is better for toughness-edge retention but worse for corrosion resistance. The M398 is probably also easier to sharpen when using aluminum oxide or ceramic abrasives. S90V has only slightly less edge retention than M398 while being significantly tougher.
Interesting! Thank you for the info. So a slight edge retention increase over s90v, and a large loss in toughness.. I'll still probably pass, but it's always good to have more new steel in the production market!


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