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by Larrin
Tue Jan 21, 2020 8:24 am
Forum: Spyderco General Discussion
Topic: Super Blue
Replies: 53
Views: 2035

Re: Super Blue

avocadobbq wrote:
Tue Jan 21, 2020 12:08 am
Does anyone know of any powdered metallurgy or spray formed steels similar to Super Blue? I love Super Blue but I think the finer grain structure is also neat.
The carbide structure of blue super is probably pretty fine. Powder metallurgy wouldn't affect it much.
by Larrin
Fri Jan 17, 2020 12:27 pm
Forum: Spyderco General Discussion
Topic: CPM SPY27 steel
Replies: 120
Views: 5228

Re: CPM SPY27 steel

I wonder if this will sort of feel like a stainless cruwear. Sharpens up to a nice razor edge easily. Maintains that high level of sharpness a little better than high vanadium steels like s110v and even s30v and it could address the constant complaints of burnt chippy edges from the factory with th...
by Larrin
Fri Jan 17, 2020 5:39 am
Forum: Spyderco General Discussion
Topic: CPM SPY27 steel
Replies: 120
Views: 5228

Re: CPM SPY27 steel

pantagana23 wrote:
Fri Jan 17, 2020 2:34 am
Larrin, just to let you know that we are waiting for article update :D
Ok I will get on it right away.
by Larrin
Thu Jan 16, 2020 4:38 pm
Forum: Spyderco General Discussion
Topic: CPM SPY27 steel
Replies: 120
Views: 5228

Re: CPM SPY27 steel

sal wrote:
Thu Jan 16, 2020 2:48 pm
Hi Larrin,

Bob will send a sample to you.

sal
Great!
by Larrin
Wed Jan 15, 2020 8:52 pm
Forum: Spyderco General Discussion
Topic: CPM SPY27 steel
Replies: 120
Views: 5228

Re: CPM SPY27 steel

Chris_P_Bacon wrote:
Wed Jan 15, 2020 8:39 pm
You hear the term "sharpener's steel" tossed around, some folks in that camp also want stainless.

SPY27 is the new "Stainless sharpener's steel". Props to Spyderco for making it happen.

Anyone know which foundry it's out of?
Crucible
by Larrin
Wed Jan 15, 2020 2:31 pm
Forum: Spyderco General Discussion
Topic: CPM SPY27 steel
Replies: 120
Views: 5228

Re: CPM SPY27 steel

I gave my analysis of the new steel here: https://knifesteelnerds.com/2020/01/15/spyderco-exclusive-cpm-spy27-steel-analysis/ Well that was fast! :) Thanks for the detailed preliminary breakdown of the steel Larrin. This has to be the fastest I've ever written an article. There are probably a zilli...
by Larrin
Wed Jan 15, 2020 2:16 pm
Forum: Spyderco General Discussion
Topic: CPM SPY27 steel
Replies: 120
Views: 5228

Re: CPM SPY27 steel

I gave my analysis of the new steel here: https://knifesteelnerds.com/2020/01/15/ ... -analysis/
by Larrin
Tue Jan 14, 2020 9:26 am
Forum: Spyderco General Discussion
Topic: S35VN Steel History and Properties
Replies: 17
Views: 734

Re: S35VN Steel History and Properties

Larrin, the following was somewhat already discussed in the "LC 200" thread, may I ask for your opinion on it?: There are those who say that if S35VN is an "upgrade" over S30V at all, than mostly for knife makers (cause it is easier to work with) than for knife users . I am a total layman, but just...
by Larrin
Tue Jan 14, 2020 6:46 am
Forum: Spyderco General Discussion
Topic: S35VN Steel History and Properties
Replies: 17
Views: 734

Re: S35VN Steel History and Properties

Hello Larrin. You brought up CPM 154 and M390 as "both have higher than expected toughness". One steel that rates pretty high on your chart is 19C27. I keep on wondering why it would be rated as highly as it is. Is it because the chrome is only 13% ? It is a 1% carbon steel like others rated much l...
by Larrin
Mon Jan 13, 2020 1:27 pm
Forum: Spyderco General Discussion
Topic: S35VN Steel History and Properties
Replies: 17
Views: 734

Re: S35VN Steel History and Properties

Great read as usual Larrin! I have to ask though...I’ve read most of your articles and have never come across you stating that you prefer/like any one particular steel over another. Do you have a favorite in stainless and non-stainless steels? I’m assuming you have to remain neutral like parents do...
by Larrin
Mon Jan 13, 2020 9:50 am
Forum: Spyderco General Discussion
Topic: S35VN Steel History and Properties
Replies: 17
Views: 734

S35VN Steel History and Properties

New article about S35VN looking at its design, edge retention, toughness, corrosion resistance, etc. And a series of experiments on heat treating it including final hardness and toughness. https://knifesteelnerds.com/2020/01/13/ ... eat-treat/
by Larrin
Sun Jan 12, 2020 9:05 pm
Forum: Spyderco General Discussion
Topic: Best Edge Performance Steel between these choices?
Replies: 50
Views: 2333

Re: Best Edge Performance Steel between these choices?

JuPaul wrote:
Sun Jan 12, 2020 8:41 pm
Can someone tell me where the poll numbers are at? I can't see them unless I vote, and since I don't have any experience with maxamet, and only limited experience with k390, I can't give an honest opinion. Still, I'm curious to know how the poll is shaping up.
Push the “View Results” button.
by Larrin
Sat Jan 11, 2020 5:05 pm
Forum: Spyderco General Discussion
Topic: Best Edge Performance Steel between these choices?
Replies: 50
Views: 2333

Re: Best Edge Performance Steel between these choices?

Well I thought K390 was pulling ahead but Rex 45 has taken the lead. Very exciting race.
by Larrin
Thu Jan 09, 2020 10:03 am
Forum: Spyderco General Discussion
Topic: Carbide Hardness Chart
Replies: 11
Views: 681

Re: Carbide Hardness Chart

GarageBoy wrote:
Thu Jan 09, 2020 8:05 am
Weird question - do the hardness of the carbides themselves vary with tempering temperature?
Not the primary carbides.
by Larrin
Wed Jan 08, 2020 6:43 am
Forum: Spyderco General Discussion
Topic: Carbide Hardness Chart
Replies: 11
Views: 681

Re: Carbide Hardness Chart

So basically, Vanadium carbides are ALMOST as hard as my head? Dang, that's impressive! :p I've often wondered how some of these "carbides" would rank overall on the "Moh's Hardness Scale"? I do know one thing for certain any steel that is abundant in Vanadium Carbides can be a real monster to shar...
by Larrin
Thu Jan 02, 2020 6:06 pm
Forum: Spyderco General Discussion
Topic: ZDP-189 - Overrated or Super Steel?
Replies: 57
Views: 3057

Re: ZDP-189 - Overrated or Super Steel?

I watched a video by Cedric and Ada where he put a few knife steels in water including ZDP-189, and I was kinda shocked that it actually appeared to do worse then M4. I've got two questions about it that hopefully don't sound too silly. 1) I've read about Galvanic corrosion where you can have a sta...
by Larrin
Thu Jan 02, 2020 3:47 pm
Forum: Spyderco General Discussion
Topic: ZDP-189 - Overrated or Super Steel?
Replies: 57
Views: 3057

Re: ZDP-189 - Overrated or Super Steel?

FYI, I was deleting some very old emails yesterday and I came across your email saying that you are now living in Golden and would like to know if you can visit Spyderco. sal Those are some old emails! Our son was born while we lived in Golden and he is 8 years old now. We liked living in Golden.
by Larrin
Wed Jan 01, 2020 10:42 pm
Forum: Spyderco General Discussion
Topic: ZDP-189 - Overrated or Super Steel?
Replies: 57
Views: 3057

Re: ZDP-189 - Overrated or Super Steel?

I think it would be too confusing to try to put out a 20% chrome steel and not call it stainless. It also limits the customer base somewhat. So, technically it is stainless according to the " above 12 % chrome" ( or whatever number is quoted) number used in commercial writings. It is confusing to e...
by Larrin
Wed Jan 01, 2020 10:24 pm
Forum: Spyderco General Discussion
Topic: ZDP-189 - Overrated or Super Steel?
Replies: 57
Views: 3057

Re: ZDP-189 - Overrated or Super Steel?

When you look at the original Hitachi spec sheet it doesn't state stainless. it just mentions that it has good corrosion resistance. https://www.discipleofdesign.com/knives/ZDP189_eng.pdf So is the "Stainless" simply assumed from the high CR content? On other pages they call it stainless, and the c...

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