The labeling of steels - Carpenter and Crucible

Hashishiin

Hashishiin

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As we know, Crucible steel is denoted with the "CPM" prefix when presented on the blade steels of Spyderco specifically. I am curious if these are proprietary to Crucible, steels like CPM-S30V, CPM-Cruwear (not Cruwear), CPM-S110V? When I read "S35VN" on my Cold Steel, has that steel come from Crucible? CAN it come from anywhere but Crucible? If not, why do other brands not give the CPM designation? Clearly duplication is an allowed thing, such as with 204P and 20CV and M390 being the same. They have different designations though, presumably to separate maker, otherwise it'd all be M390, right?

Also, Carpenter seems to designate most of its steels with the "CTS" prefix. Maxamet is a Carpenter steel. You would think with a heavy hitter like that, they would absolutely want the "CTS" behind it, right? I am confused as to why that is not there.

Thanks for any insight.
 
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Hi Hashishiin,

Crucible Particle Metallurgy = CPM
Carpenter = CTS. Could be Carpenter Tool Steels, Carpenter Tough steels, or,as came up in the meeting to come up with the terms, "Carpenter Tough Sh*t.
VG-10 is Takefu
ZDP is Htiachi as is Gingami 1, Super Blue and others
H1 is Trademarked by Spyderco and made in Japan.
B.U. is Bohler/Uddeholm - Austria

The names like CPM-35VN are trademarked names. This one is from Crucible.

Duplication isn't really allowed. If they are patented formulas,which many are, they will only be produced by the inventor.

The chemistry is know so a steel like D2, which has been around for a long time is made by different foundries. Some foundries will duplicate a steel like VG-10 and even call it VG-10, though their may be small differences in the chemistry or purity of the steel.

Hope that helps?

sal
 
OP you should edit your first post and change the fourth word to Carpenter. 154CM and D2 are ingot steels I believe. CPM-154 and CPM-D2 are Crucible's powder metallurgy improved versions of those steels.
 
Sal Glesser said:
Hi Hashishiin,

Crucible Particle Metallurgy = CPM
Carpenter = CTS. Could be Carpenter Tool Steels, Carpenter Tough steels, or,as came up in the meeting to come up with the terms, "Carpenter Tough Sh*t.
VG-10 is Takefu
ZDP is Htiachi as is Gingami 1, Super Blue and others
H1 is Trademarked by Spyderco and made in Japan.
B.U. is Bohler/Uddeholm - Austria

The names like CPM-35VN are trademarked names. This one is from Crucible.

Duplication isn't really allowed. If they are patented formulas,which many are, they will only be produced by the inventor.

The chemistry is know so a steel like D2, which has been around for a long time is made by different foundries. Some foundries will duplicate a steel like VG-10 and even call it VG-10, though their may be small differences in the chemistry or purity of the steel.

Hope that helps?

sal
Click to expand...
Yes, it helps very much! Thanks for the origins of other steels, too, I was unsure of a few like H1.

Only thing I do not understand is where you say "duplication not allowed". Then how do steels with the same formula, like 20CV and M390 exist? Is it because they are not patented formulas, or because the patent has run out?
And, why is Maxamet not under the CTS designation, it's a Carpenter steel, right?

Thank you, Sal.
Soulrack223 said:
OP you should edit your first post and change the fourth word to Carpenter. 154CM and D2 are ingot steels I believe. CPM-154 and CPM-D2 are Crucible's powder metallurgy improved versions of those steels.
Click to expand...
I did, thanks, yeah, I got mixed up. But, do you by chance know why Maxamet is not CTS-Maxamet?
 
Check the steel chart, you'll find that CPM 20CV and B/U M390 have different amounts of Silicon, so they are not identical. That's all it takes to dodge the "duplication not allowed" bullet. And the name "Maxamet" is a registered trademark of Carpenter Technologies, so adding CTS would be a bit redundent.
 
Hashishiin said:
Yes, it helps very much! Thanks for the origins of other steels, too, I was unsure of a few like H1.

Only thing I do not understand is where you say "duplication not allowed". Then how do steels with the same formula, like 20CV and M390 exist? Is it because they are not patented formulas, or because the patent has run out?
And, why is Maxamet not under the CTS designation, it's a Carpenter steel, right?

Thank you, Sal.

I did, thanks, yeah, I got mixed up. But, do you by chance know why Maxamet is not CTS-Maxamet?
Click to expand...
That’s a question to ask the manufacturer of the steel. My guess is that Maxamet doesn’t need the CTS prefix.
 
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