CTS B75p powdered dinosaur steel?

[DeadboxHero]

I don't think of it as profound. It is a well rounded steel falling between CPM 154 and S35VN/S30V in pure abrasive wear resistance. In my case it seemed like it was finer grained than BG42 parent steel just like I thought CPM D2 was compared to regular D2. It should be a bit tougher and have some better performance at the edge than the parent steel just like CPM 154 vs. 154cm but I haven't had enough experience with it to actually see it.

I don't know of anybody using it enough to have developed a tuned heat treat like was done by Buck or Chris Reeve with their BG42 or S30V . I can tell a difference in their steel vs. Benchmade or Spyderco, for instance.

It seems like I can anyways. Some would say that is impossible and my imagination (Cliff Stamp).

I like BG42 better than S30V even though S30V has higher abrasive wear resistance. I'd expect I would get along with CTS B75p but wouldn't go so far to say it ( or any other) is a better steel. I just have preferred steels in different categories. Whatever balance of attributes is best for whatever I'm expecting to do is my favorite steel at the time. If I was forced to pick one only it would be 3V or Cruwear/Zwear/PD#1

joe

Thanks for keeping it real Joe,

Do you know what hardnessed it runs for performance?

Eugene @ Olamic did a run of Wayfarer folders in CTS B75p and mine is one of them:

I've had her for a little over a year and the CTS B75p holds an edge very well. All it takes is a few strokes on a ceramic hone and its good to go again.
I usually also carry a Ferrum Forge blade in either 4V, M390, or N690, and the Wayfarer stays sharp as long as the M390 does.

Nice, good share, what's the HRC on that blade?

BG 42, and eventually BG 43 were Lew Booth's favorite steels in the
early 70's. The powdered version (B75P) should make a terrific blade...!!

Wondering where the graph came from..?
CPM 154 has no Tungsten or Vanadium....

[/QUOTE]

It's Gators app, the guy from zknives.

I just checked the crucible data sheet, you are correct, thank you

 

[The Mastiff]

Do you know what hardnessed it runs for performance?

It's usually ran a couple points higher than S30V and 154cm often going up to the rc 62 range ( rc 61-63) where it does OK. It gets chippy at that range and higher compared to what it is like at Rc 60-61 where it is pretty stable.

BG42 is the "stainless" version of the high speed bearing steel M50. It is prepared to be very clean and the CTS B75 looks to be pretty high quality as well.

I believe the Spyderco mule I have is around rc 60-62 or so but I haven't tested it. It is a good performer but I can't call one knife a lot of experience. I got my first BG42 knife in the middle 90's and have had well over a dozen at very different hardness levels and edge types so I'm more confident talking about it.

I've never heard of BG43. I can't find anything about it anywhere.

Joe

 

[minimag03]

Resurrected

It looks like Artissn Cutlery/CJRBs AR-SFII is nearly an exact copy of BG42. People keep comparing it to 154CM but shouldn't it have higher edge retention due to its 1%V? Assuming they have comparable hardnesses?

Also wanted to know if anyone else? I have the Hectar Alt and KC's exclusive Maximal in it. Its notably better than ARRPM9 from what I've seen. I bought a standard Maximal when I found it on sale and it already needs to be sharpened while the KC.is foing strong. Ot loves a strop too. I really like the Maximal, reminds me of BM Mini Freak but thinner handle and blade, so much more character than the Pyrite.

 

[knarfeng]

Resurrected

It looks like Artissn Cutlery/CJRBs AR-SFII is nearly an exact copy of BG42. People keep comparing it to 154CM but shouldn't it have higher edge retention due to its 1%V? Assuming they have comparable hardnesses?

Also wanted to know if anyone else? I have the Hectar Alt and KC's exclusive Maximal in it. Its notably better than ARRPM9 from what I've seen. I bought a standard Maximal when I found it on sale and it already needs to be sharpened while the KC.is foing strong. Ot loves a strop too. I really like the Maximal, reminds me of BM Mini Freak but thinner handle and blade, so much more character than the Pyrite.

The Mastiff
DeadboxHero
If memory serves, the "magic" of BG42 was its extreme purity due to its processing, rather than merely its composition.

From the original Latrobe BG42 data sheet, which I downloaded when Latrobe was still a company in and of itself.

LESCALLOY BG42 VIM-VAR steel is a martensitic, stainless high speed steel that combines the tempering, hot
hardness and hardness retention characteristics of M50 high speed steel with the corrosion and oxidation resistance
of type 440C stainless. LESCALLOY BG42 VIM-VAR is double vacuum melted (vacuum induction followed by
VAC-ARC® remelting) to consistently assure good cleanliness and superior properties. Although often used for
aerospace bearings and other critical applications, its excellent wear resistance and corrosion resistance makes it a
superior choice for use in cutlery applications.

METALLURGY
The metallurgy of LESCALLOY BG42 VIM-VAR is
that of high speed steel except for how it is influenced
by the higher carbon and chromium contents. These
additions provide more carbides for improved wear
resistance, with the higher chromium also increasing
corrosion resistance. Accordingly, BG42 VIM-VAR is
handled like the classic high speed steel, except the
higher alloy content requires that a longer austenitizing
time be used, along with a refrigeration cycle during heat
treatment to minimize retained austenite.
In the annealed condition, the alloy consists of a large
volume of spheroidized carbides in a ferrite matrix.
After hardening and tempering, the structure consists of
approximately 19% by volume of carbide (Cr,Mo)23C6 in
a hard martensitic matrix. Some VC type carbides are
present, while no Mo6C or Cr7C3 types have been
detected.