440V [was Is CPM-440V the holy grail?]

For comparison, Tom Mayo uses 440V alot and I think gets his blades heat-treated by Paul Bos. Does anyone have one of his blades and know how hard its tempered to and what the performance is like?

-Cliff
 
I think that JoHnYKwst was brought a little daylight into the issue:

"Spyderco heats treats their ATS-34 blades at ~59HC, and their 440V blades at ~56-58HC, and just recently lowered the hardness of their 440V blades to ~55-56HC. Even with the 440V blades having such a low rockewll hardness, Spyderco had to modify their serrations because the 440V blades were more brittle than the ATS-34 blades."

It's the dumb serrations! Spyderco is having to make softer blades to accommodate serrations. Gee, I don't want serrations. Could I just get 58 rockwell instead?
 
Hmmm.... maybe you're onto something there. I did see a Native II in a shop one time with one or two of its teeth missing. That seemed pretty brittle, I thought. But maybe it was just the teeth. It's those DAMN serrations!!


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Sometimes you're the windshield; sometimes you're the bug.
Outlaw_Dogboy


 
So now that we have a scapegoat, how do you hang or burn a serration in effigy
smile.gif


Native II... is that the SS version? That has AUS-10...a steel with probably its own nest of worms.

I'm still planning to get another BF Native (I like the knife), and maybe when I get it, I'll torture test my current combo version.

I was planning to add some light, "passive" serrations on the swedge of the new plain-edged one.
 
Keep in mind guys that Spydeco does tests and researches the heck out of their steels. The reason they're heat treating 440V to 55-56HC is because they're getting better performance with the lower hardness. If 440V performed better at 59HC I'm sure they would do it.

OD's problem with the blades hitting staples and losing an edge quickly however is different, he may benefit more from a harder blade, so long as the edge isn't brittle. In this case a steel with more toughness is more beneficial.

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Johnny
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The reason they're heat treating 440V to 55-56HC is because they're getting better performance with the lower hardness. If 440V performed better at 59HC I'm sure they would do it.
Click to expand...

I'll echo what Cliff's said earlier ... someone has to quantify "better performance". Better than what? Was that purely a measure of wear vs impact, or maybe an average of the two? What if 440V performed better at 59RC, but added to the cost, would they tell us? ... Unless someone has the numbers, it's all subjective conjecture.
 
Longden, the Native II is the all SS version. In AUS-10. Pretty high hardness based on Spydie catalog, I guess. 58-60 Rc.

You beat me to it on the "performance" question. How does Spydie define performance? Very good question.

OBTW, I finally found my way into the 440V hardness thread over on the Spydie forum...

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Sometimes you're the windshield; sometimes you're the bug.
Outlaw_Dogboy


 
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