Crucible CPM-REX-T15

farid.

farid.

Knife Maker
Knifemaker / Craftsman / Service Provider
Joined
Oct 26, 2010
Messages
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I thought some of you may like to follow my progress with this steel.
I have a few pieces of CPM-REX- T15, they are all 5/8” wide x 6” long x 5/32” thick. They came to me pre heat-treated, I ground one of the blades today, nightmare, very wear resistant, not sure how good it would be as a knife blade but I will do some testing.
Thanks for looking
Farid
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Interesting. Definitely looking forward to seeing how it does when you test it.
 
Just pulling this off the Crucible website:

Carbon 1.60%
Manganese 0.30% (0.70%)*
Silicon 0.30%
Chromium 4.00%
Vanadium 4.90%
Tungsten 12.00%
Cobalt 5.00%
Sulfur 0.06% (0.22%)*

I'm not a steel expert, but I think I may like the fine Tungsten carbides vs. the larger Vanadium carbides. Farid, can you let us know if this steel takes on a nice, fine edge (that I'm sure will also be super wear resistant).

Thanks!!!
 
Farid, how does it compare to the T1 you usually use? Less tungsten with added cobalt and vanadium seem to be the difference on paper but it must be a substantial change.

Joe
 
Gunsnknives said:
Just pulling this off the Crucible website:

Carbon 1.60%
Manganese 0.30% (0.70%)*
Silicon 0.30%
Chromium 4.00%
Vanadium 4.90%
Tungsten 12.00%
Cobalt 5.00%
Sulfur 0.06% (0.22%)*

I'm not a steel expert, but I think I may like the fine Tungsten carbides vs. the larger Vanadium carbides. Farid, can you let us know if this steel takes on a nice, fine edge (that I'm sure will also be super wear resistant).

Thanks!!!
Click to expand...

5% Cobalt! whoa! :eek:
 
My experience with very highly alloyed steels (10v-15v-s125v) is none of them will keep a hair popping sharpness, you will get them sharp and then they will lose the hair popping sharpness but keep cutting and cutting, this is why they are used in industrial applications where you need a tool that just does not wear out. For example the CPM-REX 121 was designed to bridge the gap between solid carbide and high wear resistant High Speed Steels (HSS) like T-1 that I use, in my opinion the CPM-REX 121 is such an incredible steel and amazingly difficult to work with BUT it will not suit all those people who want a steel with that ‘hair popping’ sharpness, it is designed for one reason ‘ High Wear Application and cutting tools’.




Gunsnknives said:
Just pulling this off the Crucible website:

Carbon 1.60%
Manganese 0.30% (0.70%)*
Silicon 0.30%
Chromium 4.00%
Vanadium 4.90%
Tungsten 12.00%
Cobalt 5.00%
Sulfur 0.06% (0.22%)*

I'm not a steel expert, but I think I may like the fine Tungsten carbides vs. the larger Vanadium carbides. Farid, can you let us know if this steel takes on a nice, fine edge (that I'm sure will also be super wear resistant).

Thanks!!!
Click to expand...
 
The T-1 HSS has good knife properties, the T15 I don’t know yet, will let you know.
You also talked about COBALT, in the near future I will be testing a special grade of high Cobalt alloy with 65rc, but that’s for the future.




The Mastiff said:
Farid, how does it compare to the T1 you usually use? Less tungsten with added cobalt and vanadium seem to be the difference on paper but it must be a substantial change.

Joe
Click to expand...
 
Farid,

I guess you have stock in that company that makes the belts you use? :D
 
I like it. Thickness is ok too. If it works out I'd be interesten in picking up one of those...
 
farid. said:
The T-1 HSS has good knife properties, the T15 I don’t know yet, will let you know.
You also talked about COBALT, in the near future I will be testing a special grade of high Cobalt alloy with 65rc, but that’s for the future.
Click to expand...

question: have you ever used or come across T5?
 
Really interested in how this turned out. I was originally looking at making a knife with a T1 or T2, then stumbled across the T15 and was wanting to know how it compared before jumping in.
 
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