Normal 20CV behavior?

I've seen several cases now of this issue, both on youtube and on the forums. In the beginning I just tought it was a joke but now I think I've seen 4-5 documented(semi) cases..

I've been happy with my two 3V knives from BRKT, but I have not tested them yet for steel type.. Hope I was lucky..
 
Hate to necro a post but nobody here asked the obvious question. Has anyone ever sent in one of their "problematic" knives for metallurgical testing? I hear Peter's Heat Treating will do it for a reasonable fee. It would be the best way to put fact to fiction. Personally I have bought a few of their knives so I would like to know for sure if I got screwed or not.
 
Bluegrass Survival said:
Hate to necro a post but nobody here asked the obvious question. Has anyone ever sent in one of their "problematic" knives for metallurgical testing? I hear Peter's Heat Treating will do it for a reasonable fee. It would be the best way to put fact to fiction. Personally I have bought a few of their knives so I would like to know for sure if I got screwed or not.
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You are welcome to send yours in as you suggested. The vinegar patina is sufficient test for this thread. I have done the same with 420HC, 52100 (SR101), already patina'd 1095, CPM-3V, and 8Cr13MoV - none from BRKT, I avoid them. Only the tool steels took a patina as fast as seen in this thread, the 3V blade remained in vinegar for 4 hours and showed less evidence of the effect than the OP's supposedly 20CV blade. It was clearly not 20CV. That does not mean that BRKT made the mistake intentionally, but the occurrence is FAR from an isolated incident. If you have any stainless blades from BRKT, you can test them yourself as the OP did, it will have no noticeable effect if they are correctly labeled. Quick, easy, inexpensive.
 
okbohn said:
Just getting wind of this thread. It certainly looks to me like that is A2. I would guess it got marked incorrectly and didn't get caught. I am sorry about that. I talked to Josh about it today and he is talking to Bark River and will get back to you. No matter what, we will make sure you are taken care of.
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cancelled
 
chiral.grolim said:
You are welcome to send yours in as you suggested. The vinegar patina is sufficient test for this thread. I have done the same with 420HC, 52100 (SR101), already patina'd 1095, CPM-3V, and 8Cr13MoV - none from BRKT, I avoid them. Only the tool steels took a patina as fast as seen in this thread, the 3V blade remained in vinegar for 4 hours and showed less evidence of the effect than the OP's supposedly 20CV blade. It was clearly not 20CV. That does not mean that BRKT made the mistake intentionally, but the occurrence is FAR from an isolated incident. If you have any stainless blades from BRKT, you can test them yourself as the OP did, it will have no noticeable effect if they are correctly labeled. Quick, easy, inexpensive.
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I actually thought about doing just that, if I didn't just blow $350 on a Lon Humphrey Gunfighter Bowie lol! I was just curious if anyone else ever did is all. Also the vinegar test may convince some people, but there will always be doubters, especially BRKT's hardcore fans. Now, if someone had a piece of paper in their hand, something they could post to show everyone the metallurgical make-up of the steel, then it would be harder to question. Also, I don;t have any stainless from them, just a CPM 3V blade.
 
Bluegrass Survival said:
I actually thought about doing just that, if I didn't just blow $350 on a Lon Humphrey Gunfighter Bowie lol! I was just curious if anyone else ever did is all. Also the vinegar test may convince some people, but there will always be doubters, especially BRKT's hardcore fans. Now, if someone had a piece of paper in their hand, something they could post to show everyone the metallurgical make-up of the steel, then it would be harder to question.
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What is that saying about throwing good money after bad?
 
chiral.grolim said:
Well, a few of weeks ago... https://www.bladeforums.com/threads/brk-3v-rust-patina-is-this-normal.1696304/
You could try the patina-test on the 3V or submit it for testing if you wish. In that thread, i show the result on 3V of a 4hr soak in vinegar. I would be surprised if your sample behaves very differently, you won't know if you don't try.
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I'd rather not put a patina upon it to be honest. I might send it in someday to Peters since they can test it without compromising the knife.
 
chiral.grolim said:
You are welcome to send yours in as you suggested. The vinegar patina is sufficient test for this thread. I have done the same with 420HC, 52100 (SR101), already patina'd 1095, CPM-3V, and 8Cr13MoV - none from BRKT, I avoid them. Only the tool steels took a patina as fast as seen in this thread, the 3V blade remained in vinegar for 4 hours and showed less evidence of the effect than the OP's supposedly 20CV blade. It was clearly not 20CV. That does not mean that BRKT made the mistake intentionally, but the occurrence is FAR from an isolated incident. If you have any stainless blades from BRKT, you can test them yourself as the OP did, it will have no noticeable effect if they are correctly labeled. Quick, easy, inexpensive.
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Also, I never suggested sending in my own knives originally. I wanted to know if anyone else ever sent one of their own knives in considering this has been a longtime issue with Bark River.
 
Bluegrass Survival said:
Also, I never suggested sending in my own knives originally. I wanted to know if anyone else ever sent one of their own knives in considering this has been a longtime issue with Bark River.
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Understood. I haven't sent one in - I previously owned, but it was an A2 model and I never cared to see if it was something else. For your 3V though, I didn't mean to suggest that you soak it for 4hrs in vinegar to get a patina, I apologize if it seemed that way. What I meant is that you could do as the OP did here and soak it for a few minutes - if it is really 3V, it won't patina at all in that time frame. Heck, you could do it on the perimeter of the tang (handle area), just be sure to degrease it first (wipe well with alcohol) so that the vinegar can make contact. Or don't! It was just a suggestion. Perhaps someone will come along soon to comment on results they obtained from sending one in *shrug*
 
One of the main reasons I prize M390 it that it was developed for injection
molds and feed screws. Both require high corrosion resistance and high resistance
to wear...like glass fibers in the liquid plastic mix.
I love a steel that is stain resistant and wear resistant. 20CV, 204P, M390...I have
them all. All of them have no patina of any kind.
I love it. S30V is pretty good too but I saw corrosion in places where I got some
salt on the blade...which was easy to restore perfectly.

I do not like tool steels much...except in tooling. And I keep my tools oiled.
Even so...a patina forms and the steel darkens with age which is just fine.

Larrin has probably posted an article on stain resistance before BUT given this thread
maybe a post about different results with simple home tests would be educational...
especially if pictures were posted. I am sure it has been done before...but a sticky worthy
version would be epic.

Best wishes to all! And remember...rust never sleeps. Larrin Larrin
 
I would love to know if Bark river had published anything about how they plan to prevent this mislabel steel from happening again. I wanted a fixed blade knife with CPM-154 steel and I found other than Bark river, there were far less options according to my search through online retailers. And because I was particularly targeting CPM-154 steel and I heard of the mislabel issue from bark river, I ended up get a TOPS one.
 
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