Fehrman vs Busse video

J

James0723

Joined
Mar 25, 2009
Messages
1,322
How Fehrman compares with Busse and whether CPM-3V is better than INFI are questions that I've seen debated a lot on here. Here is a video that answers which is superior in terms of corrosion resistance:

http://www.youtube.com/watch?v=lh9YXTdKn-E

Also please subscribe to the guy who made this. I like his knife review videos much more than nutnfancy's or cutlerylover's (two of the most popular knife reviewers on youtube), he seems more knowledgeable than them but he has a much smaller subscriber base.
 
I've seen some of this guys stuff before, he definitely has some nice blades. Does anyone know if he is a member here?

I'd like to compliment him on his custom made machete/sword, that he designed. (its very nice)
 
I wouldn't be surprised if he at least reads the stuff on this forum. My guess based on his accent is that he might be on British Blades.

I really liked the review. I was getting sold on the Fehrman all the way through.
 
Kaizen1 said:
I wouldn't be surprised if he at least reads the stuff on this forum. My guess based on his accent is that he might be on British Blades.

I really liked the review. I was getting sold on the Fehrman all the way through.
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Sounds more like a Kiwi. Might be Kyley Harris he does a review or two on you tube.

http://www.knifeforums.com/forums/showpost.php?post/1946783/

Kevin

EDIT: Just watched the video again and I noticed he introduces himself as Kyley right at the start.
 
James0723 said:
Here is a video that answers which is superior in terms of corrosion resistance:

http://www.youtube.com/watch?v=lh9YXTdKn-E
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Not necessarily. What "Kyley" apparently doesn't understand is that different steels corrode in different ways. And the manner in which a steel rusts is every bit as important as how quickly the process begins. Many high carbon steels can develop a patina that will increase over decades of use and practically speaking will have a minimal to negligible effect on the functionality of the blade. In contrast, CPM-3V is known to have a much greater propensity to pit deeply when exposed to corrosive conditions. Unlike a patina, pitting can have seriously adverse effects on the strength, performance and ultimately the life span of a blade. This isn't meant to be a commentary on the Busse vs. Fehrman debate, just a general reminder that real blade testing can sometimes be trickier than it looks.
 
He does a decent video, but nothing extraordinary. Had to watch a few more of his vids to warm up to his approach. His comments on handle egros are pretty good. As to the onion test for rusting, I'd like to see him include his SAR4 which has the factory satin finish. Hard to say if the ghetto strip on the NMSFNO got all the decarb off. The SAR4 would be a better test subject.
 
I've heard it go both ways. Some way 3V is more stain resistant, others say INFI. But if stain resistance is really that important, you would go with a stainless steel. Tough stainless steels do exist, they are just not that common.
 
cotdt said:
I've heard it go both ways. Some way 3V is more stain resistant, others say INFI. But if stain resistance is really that important, you would go with a stainless steel. Tough stainless steels do exist, they are just not that common.
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That's true, Strider treated S30V is extremely tough. :D :thumbup:
 
Bronco said:
Not necessarily. What "Kyley" apparently doesn't understand is that different steels corrode in different ways. And the manner in which a steel rusts is every bit as important as how quickly the process begins. Many high carbon steels can develop a patina that will increase over decades of use and practically speaking will have a minimal to negligible effect on the functionality of the blade. In contrast, CPM-3V is known to have a much greater propensity to pit deeply when exposed to corrosive conditions. Unlike a patina, pitting can have seriously adverse effects on the strength, performance and ultimately the life span of a blade. This isn't meant to be a commentary on the Busse vs. Fehrman debate, just a general reminder that real blade testing can sometimes be trickier than it looks.
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this is a really good point,ive seen first hand with steel corrosion. everybody equates carbon steel with corrosion but the fact is in someways it deals with corrosion better than other steel. that pitting bronco is talking about can go deep, and screw up an edge like you just dont see with carbon steel blades that have developed a patina. its like the patina is an old war horses tough hide. oppossed to some young buck never been tested in battle.
 
Jigged Bone said:
this is a really good point,ive seen first hand with steel corrosion. everybody equates carbon steel with corrosion but the fact is in someways it deals with corrosion better than other steel. that pitting bronco is talking about can go deep, and screw up an edge like you just dont see with carbon steel blades that have developed a patina. its like the patina is an old war horses tough hide. oppossed to some young buck never been tested in battle.
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In my experience, carbon steel blades develop pitting the worst. My stainless steel blades never develop any pitting. The high speed steels also have excellent pitting resistance, although they develop a patina after cutting onions.
 
cotdt said:
In my experience, carbon steel blades develop pitting the worst. My stainless steel blades never develop any pitting. The high speed steels also have excellent pitting resistance, although they develop a patina after cutting onions.
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well i will sure be checking back on this thread to see if a consensus of opinion on this matter emerges. its very interesting, and i suppose there are a bunch of variables that would result in different outcomes.
 
cotdt said:
In my experience, carbon steel blades develop pitting the worst. My stainless steel blades never develop any pitting.
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Stainless steels are a whole 'nother kettle of fish. My intention was only to point out that there are variations in the way that different non-stainless steels develop corrosion, and that these differences can be much more important than the speed with which the process begins.
 
Bronco said:
Not necessarily. What "Kyley" apparently doesn't understand is that different steels corrode in different ways. And the manner in which a steel rusts is every bit as important as how quickly the process begins. Many high carbon steels can develop a patina that will increase over decades of use and practically speaking will have a minimal to negligible effect on the functionality of the blade. In contrast, CPM-3V is known to have a much greater propensity to pit deeply when exposed to corrosive conditions. Unlike a patina, pitting can have seriously adverse effects on the strength, performance and ultimately the life span of a blade. This isn't meant to be a commentary on the Busse vs. Fehrman debate, just a general reminder that real blade testing can sometimes be trickier than it looks.
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Very well said. As Jerry Hossom has stated

Jerry Hossom said:
Yes, he is. :D

The problem with corrosion on 3V is the presence of oxides in the steel at the surface. It's a product of the production process and is what makes the steel susceptible to the rust spots/pitting that can happen.
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and

Jerry Hossom said:
While 3V is certainly not stainless, it does contain enough free chromium to provide some anti-corrosion protection. When I first used the steel and noted how it corroded, widely scattered spots of orange rust under which were fairly deep pits, I ask the then chief metallurgist at Crucible Steel about what I saw. He said the spots were the result of surface oxides, presummably iron oxides. I'm guessing these oxides are contaminents in the CPM powders which are then trapped in the steel when it is hipped.
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These come from Jerry Hossom therefore, I would take them as very credible comments.
 
Andros said:
M2-HSS rusts very easily. Admitedly though, it takes and holds a very keen edge!
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Yeah M2 and M4 both rusts, but in its favor, its high molybdenum content prevents pitting. Crucible datasheets talk about this. I find high speed steels quite easy to sharpen given their typical high hardness. And rusting is still not nearly as bad as the 10xx series steel.

I have many knives made out of simple steels like 1084/1095. One slice through the onion and you can watch as the blade turns orange. Some of the knives were made in the mid-1800's, they are either pitted real bad or still mirror polished. Once pitting starts, it will spread quickly. In the mirror polished blades, pitting never starts in the first place, because it didn't rust.

Regarding CPM 3V, it could be faulty steel:

http://www.flickr.com/photos/28294734@N04/3821228635/
http://www.flickr.com/photos/28294734@N04/3821228579/
 
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All valid points for sure. How blades are finished will also affect how they rust. For instance Jerry Hossom also recommended developing a fine finish on 3V, etching for a few minutes, and then brushing back to a fine finish, to assist with the corrosion issues.
 
Bronco said:
Not necessarily. What "Kyley" apparently doesn't understand is that different steels corrode in different ways. And the manner in which a steel rusts is every bit as important as how quickly the process begins. Many high carbon steels can develop a patina that will increase over decades of use and practically speaking will have a minimal to negligible effect on the functionality of the blade. In contrast, CPM-3V is known to have a much greater propensity to pit deeply when exposed to corrosive conditions. Unlike a patina, pitting can have seriously adverse effects on the strength, performance and ultimately the life span of a blade. This isn't meant to be a commentary on the Busse vs. Fehrman debate, just a general reminder that real blade testing can sometimes be trickier than it looks.
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bearcut said:
Another Busse myth debunked!
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Guess you didn't read the above post HUH? ;)
 
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