incoming.. custom, Duane Dwyer SNG in the ultimate of super steels, CMP REX 121!

Dear members,
Custom knives have never been made from CPM-REX 121 before, I am putting together a few ideas on testing these two knives, please post your ideas on here, any kind of tests that you would like to see , I am putting together a list of tests that I would like to carry out when they are finished.
Many thanks
Farid
 
farid. said:
Since you asked the question, I will answer.
The steel in the annealed state is around 57-58 rc, it cannot be annealed any more, Crucible has sent me that CPM REX 121 in the softest state possible.
I hope that answers your question.
kind regards
Farid
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Farid,
it is 57-58 in its annealed state?? huh?

best is fine, but is it best for the application you intend?? I am pretty sure that is what Mastiff is asking

IMHO it doesnt look as impressive as CPM M4 to my VERY untrained eye
 
Leatherface said:
Farid,
it is 57-58 in its annealed state?? huh?

best is fine, but is it best for the application you intend?? I am pretty sure that is what Mastiff is asking

IMHO it doesnt look as impressive as CPM M4 to my VERY untrained eye
Click to expand...


Hello Dave,
This is an experiment, I often like to make prototypes in different CPM steels and try them out and see how they will perform. It was also mentioned earlier that MPL-1 is another super steel that you can try, yes I came across that steel a very long time ago and wanted to try it but the fact about that steel is the grain structure is not so fine, it can be used for making tooling, for example if you were to punch out say ten million cans of soft drinks it can do it without much wear on the tooling but MPL-1 does not have a fine grain structure.
CPM-M4 is much tougher than REX 121, on wear resistance it will not come anywhere near the REX 121. Like I have said above, this is an experiment.
Regards
Farid
 
These are some of the knives I have made in the past from some high spec Crucible steels, CPM-15v and the very first custom knife made from CPM-S-125v with 6AL-4V bolsters.
Regards
Farid
faridknives017.jpg

hgvg.jpg
 
Since you asked the question, I will answer.
The steel in the annealed state is around 57-58 rc, it cannot be annealed any more, Crucible has sent me that CPM REX 121 in the softest state possible.
I hope that answers your question.
kind regards
Farid
Click to expand...

Farid,

It was pretty much the same with S125V when it came, though it wasn't quite that high. The heat from cutting had changed the hardness and it turned out to need another annealing before being worked. When you got the S125V did you have problems with that too? Was it in the high 40's to lower 50's when you got it?

Good luck!

Joe/raleigh
 
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The Mastiff said:
Farid,

It was pretty much the same with S125V when it came, though it wasn't quite that high. The heat from cutting had changed the hardness and it turned out to need another annealing before being worked. When you got the S125V did you have problems with that too? Was it in the high 40's to lower 50's when you got it?

Good luck!

Joe/raleigh
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Hello Joe, how are you sir.
When I got the CPM S125v It was 42rc, very hard to work with. I heat-treated it to around 68rc then tempered to around 65-66. It out cut everything other than CPM-15v.
take care
Farid
 
The Mastiff said:
Farid,

It was pretty much the same with S125V when it came, though it wasn't quite that high. The heat from cutting had changed the hardness and it turned out to need another annealing before being worked. When you got the S125V did you have problems with that too? Was it in the high 40's to lower 50's when you got it?

Good luck!

Joe/raleigh
Click to expand...

Joe,
This is what I am registering before I heat-treat the REX 121.
Regards
Farid

DSC05647.jpg
 
Farid,

I saw that on the other forum and felt sick at the thought of grinding it. I was thinking a pre grinding anneal couldn't hurt. The S125V I had was in the high 40's and did need annealing before grinding. It brought it down to around where yours was when you got it and I am thinking yours might have been annealed by crucible before it went back out. This was 3-4 years ago maybe? It's been a while.

One of us should ask Dwayne Dwyer what his RC'ed at when he got it as he's been working with Rex 121 long enough to be near being sold out on the SNG's he made with the steel.

From reading the forums over the years and seeing some of the knives you've made I know you've never backed down from any steel I've seen. This confirms it. As much as I enjoy trying different steels you have me beat here. :)

I couldn't afford the belts you will be using on that project. Good luck, and please keep us posted.

Regards, Joe
 
The Mastiff said:
Farid,

I saw that on the other forum and felt sick at the thought of grinding it. I was thinking a pre grinding anneal couldn't hurt. The S125V I had was in the high 40's and did need annealing before grinding. It brought it down to around where yours was when you got it and I am thinking yours might have been annealed by crucible before it went back out. This was 3-4 years ago maybe? It's been a while.

One of us should ask Dwayne Dwyer what his RC'ed at when he got it as he's been working with Rex 121 long enough to be near being sold out on the SNG's he made with the steel.

From reading the forums over the years and seeing some of the knives you've made I know you've never backed down from any steel I've seen. This confirms it. As much as I enjoy trying different steels you have me beat here. :)

I couldn't afford the belts you will be using on that project. Good luck, and please keep us posted.

Regards, Joe
Click to expand...

Thanks Joe,
I didn't know if anyone had made a knife from this as it is only available in thick bars of 10mm, Most people don't want to start with 10 to12mm and grind down to around 3/16" or so for folders. Crucible said they would send me 10mm but it turned out to be over 12mm. I am just taking a guess when I say I am the first custom maker to use REX 121, I don't know. I will keep you posted on my progress.
Kind regards
Farid
 
Hey farid. I gotta start off saying that I think its awesome your working with this steel. Definitely keep us posted pls on the progress.

What everyone is referring to is that Duane Dwyer from Strider has actually made 2 folders that we are aware of. They are on the market at the moment. I would love to know the details on how he handled the steel.

It might be a good idea to shoot Strider an email, and see if you could get a reply from Duane.
 
Kingofthellamas said:
Hey farid. I gotta start off saying that I think its awesome your working with this steel. Definitely keep us posted pls on the progress.

What everyone is referring to is that Duane Dwyer from Strider has actually made 2 folders that we are aware of. They are on the market at the moment. I would love to know the details on how he handled the steel.

It might be a good idea to shoot Strider an email, and see if you could get a reply from Duane.
Click to expand...

Hello,
I think it would be very time consuming to make anything from this steel, grinding it is hard to begin with, after heat-treating it will be very hard indeed. I am happy to see other makers out there experimenting with different steels, it is important to me as a maker to push the boundaries and see where we can go with super steels, what they can do etc. People at Crucible steels are friends of mine and whenever I needed something new to try they have always helped. Although these two pieces were very expensive bars but it is worth it to find out what it can do.

I have a bunch of tests which I will carry out on these knives.
Take care
Farid
 
Talking about CPM stuff, I thought you all might like to see this T-9000™ TECHTON-C™ knife I made some time ago, in the core there is 66rc CPM-S-125v.
take care all.
Farid

FARIDTechton-CcarbonCompositknife008-Copy.jpg

FARIDTechton-CcarbonCompositknife00.jpg
 
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farid. said:
Talking about CPM stuff, I thought you all might like to see this T-9000™ TECHTON-C™ knife I made some time ago, in the core there is 66rc CPM-S-125v.
take care all.
Farid

FARIDTechton-CcarbonCompositknife008-Copy.jpg

FARIDTechton-CcarbonCompositknife00.jpg
Click to expand...


Simply awesome! That sir is impressive work, thanks for the pics.
 
Farid,

I was thinking that it would be nice to have somewhere on one website where people could see some of your projects, as well as get an overview of the things you've done. The last couple years are easy for us to find most of your projects like this one but you have been doing this for a long time. I've visited your website for years now but frankly you have a lot more to offer.

You have used T series steels, D series steels, CPM V, and Rex series stuff. Pretty exotic stuff. Oh, and everything else pretty much.

To be honest, you should write a book or something. It may not be as fun as hogging steel at the grinder but you not only work the steels, but you test them too.

That's a lot of experience that a bunch of people would love to be able to access.

Please consider. :)

Thanks, Joe/raleigh
 
The Mastiff said:
Farid,

I was thinking that it would be nice to have somewhere on one website where people could see some of your projects, as well as get an overview of the things you've done. The last couple years are easy for us to find most of your projects like this one but you have been doing this for a long time. I've visited your website for years now but frankly you have a lot more to offer.

You have used T series steels, D series steels, CPM V, and Rex series stuff. Pretty exotic stuff. Oh, and everything else pretty much.

To be honest, you should write a book or something. It may not be as fun as hogging steel at the grinder but you not only work the steels, but you test them too.

That's a lot of experience that a bunch of people would love to be able to access.

Please consider. :)

Thanks, Joe/raleigh
Click to expand...

Hello Joe,
You and I will have to talk about that more, yes I think it's something that I could do so people can see the older stuff as well as the new knives.
Lets talk later,
regards
Farid
 
Gimme a break. Milktoast liked the steel but gave up on the blade length.
I compromised everything I have held true about folders: I'll never own a liner lock; I'll never own a tanto style blade again; I'll never purchase a blade with a chisel edge; I'll never own a Strider (too bulky).
Well, I was impressed enough with the SNG DGG REX121 to give it a try. I picked up the blade matching the above descriptions simply to give this steel a wringing out. I am at the fondling stage now and had a question. One side is titanium and the other carbon fiber which give it a pleasing light weight,
but does this place restrictions on how aggressively the knife should be used?
 
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