cpm440v heattreat

I'm currently in the process of making two knives out of CPM440V, one is a freshwater diving knife the other a field/utility knife. I'm using 3/16" stock and the blades are 4 to 4 1/2" in length. Does anyone have any suggestions for the best hardness (RC) for this type of knife/steel combination? I'm leaning towards 56-57RC. Comments?
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The blades are 3/16 thick at the spine and 1 1/4 wide, saber ground 2/3 of the blade width and with a short swedge of about 1/2 the blade length. Hope this helps.

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Just because you're not paraniod doesn't mean they're not out to get you
 
If they won’t be used on any thing hard 56-57 would be OK but they will deform if they
hit hard stuff IE rocks,grit ect.
With that grind and edge(my favorite BTW) 58-59 will up the resistance to deforming and
bring the edge holding up too.
When I used 440V I would run it at 59 unless they where thin then I would use 57.
cryogenic is a must with 440V.
Who is going to do the treat?

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Edward Randall Schott
Knifemaker
edschott@rcn.com

www.angelfire.com/ct/schottknives/

[This message has been edited by Edward R Schott (edited 01-28-2000).]
 
Thanks for the info. I'm going to have the heat treat done by Moe Price in Toronto, he comes highly recommended. With luck they'll be ready to go on Monday.

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Just because you're not paraniod doesn't mean they're not out to get you
 
from my understanding the V steel is heat treated just like 440C, and so you need to keep it at or above 56 Rc and no higher than 58 or 59 max. lower than 56 affects the corrosion resistance adversely, higher than 58 makes it start being brittle.

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http://www.mayoknives.com


 
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