Any Interest For A CPM REX 121 Mule?

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El Gato
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Any Interest For A CPM REX 121 Mule?

Postby El Gato » Sat Nov 04, 2017 8:09 pm

I would like to ask if there is any interest in a future Mule Team, or perhaps other knife models, in CPM REX 121 tool steel.
Please refer to the link for Crucible's Data Sheet for REX 121:
https://www.crucible.com/eselector/prod ... pm121.html

A few quotes from Crucible:
"CPM REX 121 is a high vanadium cobalt bearing tool steel designed to offer a combination of the highest wear resistance, attainable hardness ..."

"Its superior wear resistance (due to the high vanadium content) helps maintain a sharp cutting edge ....."

"CPM REX 121 also bridges the performance gap between high alloy tool steels and carbide materials."

"Wear Resistance (depends on application and hardness) approximately 50%-100% better than T15, CPM REX 76 or CPM 10V."

"Toughness (depending on heat treatment) approximately comparable to CPM 15V, CPM REX 76 at maximum hardness, or conventional T15."

REX 121 has a high percentage of Carbon 3.4%, Molybdenum 5.0%, and Vanadium 9.5%.
It also has high percentages of Tungsten and Cobalt that contribute to hot hardness. Not greatly important in a knife blade, but also not objectionable.

So, my question is: Would anyone else besides myself be interested in trying CPM REX 121 in a future Mule, or other knife model?
This could be a possibility if there is sufficient interest. Thank you for taking the time to share your thoughts. :)

Dave

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Evil D
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Re: Any Interest For A CPM REX 121 Mule?

Postby Evil D » Sat Nov 04, 2017 8:17 pm

I know there was talk of this at some point, I feel like maybe they went with Maxamet instead but don't quote me.
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swigert
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Re: Any Interest For A CPM REX 121 Mule?

Postby swigert » Sat Nov 04, 2017 9:00 pm

Evil D wrote:I know there was talk of this at some point, I feel like maybe they went with Maxamet instead but don't quote me.
That’s what I thought also.

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jabba359
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Re: Any Interest For A CPM REX 121 Mule?

Postby jabba359 » Sun Nov 05, 2017 1:35 am

That had been the plan back in Sept. 2015
sal wrote:[REX 121 is] very expensive to purchase and process. We have a run being produced for us for a Mule Team.

sal
...but in a post from July 2017, it looks like Maxamet happened instead.
sal wrote:BTW, we did some testing with Rex 121 and opted for the Maxamet as a Mule team test instead.

sal
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Re: Any Interest For A CPM REX 121 Mule?

Postby Bodog » Sun Nov 05, 2017 6:17 am

Rex 121 isn't as great as it sounds on paper. 15V, S125V, and, to a lesser extent, Maxamet do what Rex 121 is supposed to do for knives.

I'd rather see a Vanadis 10 and 15V mule.
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Ryno
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Re: Any Interest For A CPM REX 121 Mule?

Postby Ryno » Sun Nov 05, 2017 8:30 am

I'm still waiting for the proposed bronze mule. I'd buy that in a hurry.
Ryan

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Re: Any Interest For A CPM REX 121 Mule?

Postby wrdwrght » Sun Nov 05, 2017 2:05 pm

I'd try it (in a signature folder), but I'm a user, not a maker. I'd imagine Spyderco, being a maker of duplicates, would see (has seen?) the wear-resistance of REX121 to be quite daunting.


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