Spyderco Tenacous blade steel?

J

johned

Joined
May 25, 2010
Messages
58
I bought this knife mostly because it was on sale and I have friends that are fans of Spyderco cutlery. What a great discovery. Seems well made for twice what I paid. I hear great things about the steel used, 8Cr13MoV, and that it is a high medium grade. Fine with me and that "stainless" catagory is no longer the insult since my first Gerber 440c that is better than 440C. The Spidy should outperform the Gerber by a long shot.


PROBLEM: My Spyderco Tenacious sticks to my magnetic knife rack like a tin can. I though "stainless" was not subject to magnets....only gravity. Anybody know what is up with this. Am I that old at 75? Have i missed something?

Thanks,

Surprised in Eugene Orygun.
 
Aluminum and Ti are the only common nonmagnetic metals used in production knives. All "steels" are magnetic.
 
Comeuppance said:
Aluminum and Ti are the only common nonmagnetic metals used in production knives. All "steels" are magnetic.
Click to expand...

"The two main types are austenitic and ferritic, each of which exhibits a different atomic arrangement. Due to this difference, ferritic stainless steels are generally magnetic while austenitic stainless steels usually are not."

http://www.scientificamerican.com/article/why-dont-magnets-work-on/

https://www.fastenal.com/en/75/magnetism-in-stainless-steel-fasteners
 
I've never encountered a stainless steel knife blade that was non magnetic.
If anyone ever does, please throw it in the garbage.
 
Comeuppance said:
Aluminum and Ti are the only common nonmagnetic metals used in production knives. All "steels" are magnetic.
Click to expand...

stabman said:
"The two main types are austenitic and ferritic, each of which exhibits a different atomic arrangement. Due to this difference, ferritic stainless steels are generally magnetic while austenitic stainless steels usually are not."

http://www.scientificamerican.com/article/why-dont-magnets-work-on/

https://www.fastenal.com/en/75/magnetism-in-stainless-steel-fasteners
Click to expand...
This was very interesting, thanks for sharing.:thumbup:
 
johned said:
I bought this knife mostly because it was on sale and I have friends that are fans of Spyderco cutlery. What a great discovery. Seems well made for twice what I paid. I hear great things about the steel used, 8Cr13MoV, and that it is a high medium grade. Fine with me and that "stainless" catagory is no longer the insult since my first Gerber 440c that is better than 440C. The Spidy should outperform the Gerber by a long shot.


PROBLEM: My Spyderco Tenacious sticks to my magnetic knife rack like a tin can. I though "stainless" was not subject to magnets....only gravity. Anybody know what is up with this. Am I that old at 75? Have i missed something?

Thanks,

Surprised in Eugene Orygun.
Click to expand...

Actually, although I'm always impressed at the performance of the budget blades, like the Spydie Tenacious, in 8cr13mov, it is an inferior steel to 440C.
 
Zemapeli said:
This was very interesting, thanks for sharing.:thumbup:
Click to expand...

You're welcome. :)
The first time I came across steel that was non-magnetic, I was like "What?"
As far as I knew, all steel was magnetic.

But that's the great thing about life; there's always another thing to find out about. :thumbup:
 
And from Stabman's reference/link: There are five classes of stainless steel (ferritic, austenitic, martensitic, duplex, and precipitate-hardened) and only one is nonmagnetic (austenitic). However, the austenitic class just happens to include the most widely and universally used types of stainless steels in the market. The first four classes are defined based on the microstructure of the metal with the last class, PH, based on its heat treatment. Microstructure is important because this is what gives the stainless steel its magnetic properties.

I feel a lot better now that i know the story. While I was not tempted to throw my Spidi away over this I feel better about the knife, as well.

Thank you Stabman.
 
I work in a large automotive related factory. I work and weld on a lot of stainless. Most all stainless that's for high heat applications (304,330, all stuff in the 300's) in deffinetly non magnetic.

Mike
 
Mike and others,

I am 75 and have been futzing with mechanical stuff all my life. I had it as a belief that "stainless" was simply not magnetic. My eyes have been opened and i can see where I have lived a sheltered life. At the same time we heard from people that felt that "all" stainless was, in fact, magnetic. There seemed to be two camps with totally conflicting opinions. Then there were you guys that actually knew the full story that stainless can be either magnetic or non-magnetic depending on the alloy.

Thank you all,

John
 
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