Anticipation of: CPM REX T15 in MT34
Anticipation of: CPM REX T15 in MT34
Is your "Mule Sense" tingling for the T15 mule? Have any of you experienced T15 in another blade? What do we know about T15...the good, bad & ugly? Spyderco says it's an end mill steel, so that means I need one. Maybe I can chuck it in my mill and use it to drill tapered holes! (Not.)
Steel novice who self-identifies as a steel expert. Proud M.N.O.S.D. member 0003. Spydie Steels: 4V, 15V, 20CV, AEB-L, AUS6, Cru-Wear, HAP40, K294, K390, M4, Magnacut, S110V, S30V, S35VN, S45VN, SPY27, SRS13, T15, VG10, XHP, ZWear, ZDP189
Re: Anticipation of: CPM REX T15 in MT34
No experience whatsoever but this is the one I anticipated the most between Rex76, M398 and T15.
Especially since I have to do the best handle yet on one of these blade for someone !
Especially since I have to do the best handle yet on one of these blade for someone !
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- legOFwhat?
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Re: Anticipation of: CPM REX T15 in MT34
If this is correct we should be in for another treat!
![Image](https://i.imgur.com/xKmyi9d.jpg)
Sorry for giant pic...
![Image](https://i.imgur.com/xKmyi9d.jpg)
Sorry for giant pic...
-Larry
Hebrews 13:6 So we may boldly say: “The Lord is my helper; I will not fear. What can man do to me?”
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Hebrews 13:6 So we may boldly say: “The Lord is my helper; I will not fear. What can man do to me?”
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- Josh Crutchley
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Re: Anticipation of: CPM REX T15 in MT34
I had the pleasure of testing a blade in T15 from Bluntcut Metalworks. I was really impressed with how easy it sharpened, kinda reminded me of Maxamet. It had a custom heat treatment but I would need to try some other T15 to understand the differences.
Re: Anticipation of: CPM REX T15 in MT34
Leg's post implies 68-70 Rc. That's pretty durned high. Are we expecting this sort of hardness from the T15 mule?
And...what steel database are you referencing on your phone, Leg? That's pretty cool.
And...what steel database are you referencing on your phone, Leg? That's pretty cool.
Steel novice who self-identifies as a steel expert. Proud M.N.O.S.D. member 0003. Spydie Steels: 4V, 15V, 20CV, AEB-L, AUS6, Cru-Wear, HAP40, K294, K390, M4, Magnacut, S110V, S30V, S35VN, S45VN, SPY27, SRS13, T15, VG10, XHP, ZWear, ZDP189
- Josh Crutchley
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Re: Anticipation of: CPM REX T15 in MT34
That's the range for Zmax. I think he was referring to where it said Zmax was comparable to T15. I would expect something around 65-67 hrc.
Re: Anticipation of: CPM REX T15 in MT34
Maxamet is a higher carbon, higher cobalt, slightly higher vanadium version of T15. CPM-T15 is normally tops out at 66, maybe 67 Rc. I would anticipate something like 64-66 Rc depending on how they want to heat treat it.
http://www.KnifeSteelNerds.com - Steel Metallurgy topics related to knives
- legOFwhat?
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Re: Anticipation of: CPM REX T15 in MT34
The app is z-knives. I have no idea how accurate it is.
-Larry
Hebrews 13:6 So we may boldly say: “The Lord is my helper; I will not fear. What can man do to me?”
MNOSD #0049
Hebrews 13:6 So we may boldly say: “The Lord is my helper; I will not fear. What can man do to me?”
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- Manixguy@1994
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Re: Anticipation of: CPM REX T15 in MT34
This steel is so interesting and after reading up on it , just may have to order one . Dan
MNOSD 0002 / Do more than is required of you . Patton
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Nothing makes earth so spacious as to have friends at a distance; they make the latitudes and longitudes.
Henry David Thoreau
Re: Anticipation of: CPM REX T15 in MT34
Manixguy@1994 wrote: ↑Fri Jan 06, 2023 10:58 amThis steel is so interesting and after reading up on it , just may have to order one . Dan
Don't keep it to yourself, ManixMan--share the knowledge! What did you discover?
legOFwhat? wrote: ↑Fri Jan 06, 2023 10:20 amThe app is z-knives. I have no idea how accurate it is.
Must be Android only. Couldn't find for iPhone. All I can find is a game that features a knife-wielding bunny. And absolutely no info on the steel that's used in the bunny's knife.
WAIT. Here it is, in Apple App Store called "Knife Steel Composition Chart." Thanks, Leg.
Steel novice who self-identifies as a steel expert. Proud M.N.O.S.D. member 0003. Spydie Steels: 4V, 15V, 20CV, AEB-L, AUS6, Cru-Wear, HAP40, K294, K390, M4, Magnacut, S110V, S30V, S35VN, S45VN, SPY27, SRS13, T15, VG10, XHP, ZWear, ZDP189
- Manixguy@1994
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Re: Anticipation of: CPM REX T15 in MT34
I’ve have been behind reading up about this steel . I recently read Dr. Larrin’s article on his site and was impressed. I also think it is time for me to give a tool steel Mule a try . Nothing really earth shattering just good information and history of the steel . DanBolster wrote: ↑Fri Jan 06, 2023 4:04 pmManixguy@1994 wrote: ↑Fri Jan 06, 2023 10:58 amThis steel is so interesting and after reading up on it , just may have to order one . Dan
Don't keep it to yourself, ManixMan--share the knowledge! What did you discover?
legOFwhat? wrote: ↑Fri Jan 06, 2023 10:20 amThe app is z-knives. I have no idea how accurate it is.
Must be Android only. Couldn't find for iPhone. All I can find is a game that features a knife-wielding bunny. And absolutely no info on the steel that's used in the bunny's knife.
WAIT. Here it is, in Apple App Store called "Knife Steel Composition Chart." Thanks, Leg.
MNOSD 0002 / Do more than is required of you . Patton
Nothing makes earth so spacious as to have friends at a distance; they make the latitudes and longitudes.
Henry David Thoreau
Nothing makes earth so spacious as to have friends at a distance; they make the latitudes and longitudes.
Henry David Thoreau
Re: Anticipation of: CPM REX T15 in MT34
Re-upping one of Dr. Larrin's graphics that gives some context for T15. IIRC, Larrin drew the curves in the neighborhood of the best examples of tool steel, rather than through all the examples.* In other words, I don't think the curve represents a quadratic regression curve attempting to fit all the tool steel points. If true, then I suspect that T15 is not necessarily a laggard that's "behind the curve," I'm guessing (trying to fit a regression curve by eye, yes, dangerous) that T15 is probably about where you'd expect it to be for toughness, given its CATRA scores. Bested by Vanadis 8, but outshining Rex 76, in this graphic.
*A little confusing since the stainless steel curve appears to be more in the swarm of points. But I'm still guessing these are not regression-fit curves, since Dr. Thomas didn't include the formula for the line. If they were regression curves they'd probably have a formula attached.
*A little confusing since the stainless steel curve appears to be more in the swarm of points. But I'm still guessing these are not regression-fit curves, since Dr. Thomas didn't include the formula for the line. If they were regression curves they'd probably have a formula attached.
Steel novice who self-identifies as a steel expert. Proud M.N.O.S.D. member 0003. Spydie Steels: 4V, 15V, 20CV, AEB-L, AUS6, Cru-Wear, HAP40, K294, K390, M4, Magnacut, S110V, S30V, S35VN, S45VN, SPY27, SRS13, T15, VG10, XHP, ZWear, ZDP189
- Josh Crutchley
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Re: Anticipation of: CPM REX T15 in MT34
I think people get caught up on charpy toughness a little too much. It doesn't really correlate to edge stability in my experience. It does a good job showing what happens at the limit but not below. There's two failure modes for steel ductile and brittle. If the steel is ductile it will deform before it fractures giving higher toughness numbers. A brittle steel will just hold form until failure resulting in lower numbers. I think what happens before the limit might be more important than where that limit is.Bolster wrote: ↑Sat Jan 07, 2023 11:32 amRe-upping one of Dr. Larrin's graphics that gives some context for T15. IIRC, Larrin drew the curves in the neighborhood of the best examples of tool steel, rather than through all the examples.* In other words, I don't think the curve represents a quadratic regression curve attempting to fit all the tool steel points. If true, then I suspect that T15 is not necessarily a laggard that's "behind the curve," I'm guessing (trying to fit a regression curve by eye, yes, dangerous) that T15 is probably about where you'd expect it to be for toughness, given its CATRA scores. Bested by Vanadis 8, but outshining Rex 76, in this graphic.
*A little confusing since the stainless steel curve appears to be more in the swarm of points. But I'm still guessing these are not regression-fit curves, since Dr. Thomas didn't include the formula for the line. If they were regression curves they'd probably have a formula attached.
- legOFwhat?
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Re: Anticipation of: CPM REX T15 in MT34
Where you at T15? ![beaming face :beaming-face](./images/smilies/beaming-face-with-smiling-eyes.png)
![beaming face :beaming-face](./images/smilies/beaming-face-with-smiling-eyes.png)
-Larry
Hebrews 13:6 So we may boldly say: “The Lord is my helper; I will not fear. What can man do to me?”
MNOSD #0049
Hebrews 13:6 So we may boldly say: “The Lord is my helper; I will not fear. What can man do to me?”
MNOSD #0049
- Tucson Tom
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Re: Anticipation of: CPM REX T15 in MT34
Interesting that Rex45 and Rex76 are close neighbors on that chart. Two of my absolute favorite steels.
I used to cry every night that there was no Rex-45 mule, but the Rex-76 mule took all the tears away.
I used to cry every night that there was no Rex-45 mule, but the Rex-76 mule took all the tears away.
Re: Anticipation of: CPM REX T15 in MT34
Cutting a nail and a lateral deformation test is better for a knife steel test.Josh Crutchley wrote: ↑Sun Jan 08, 2023 7:02 pmI think people get caught up on charpy toughness a little too much. It doesn't really correlate to edge stability in my experience. It does a good job showing what happens at the limit but not below. There's two failure modes for steel ductile and brittle. If the steel is ductile it will deform before it fractures giving higher toughness numbers. A brittle steel will just hold form until failure resulting in lower numbers. I think what happens before the limit might be more important than where that limit is.Bolster wrote: ↑Sat Jan 07, 2023 11:32 amRe-upping one of Dr. Larrin's graphics that gives some context for T15. IIRC, Larrin drew the curves in the neighborhood of the best examples of tool steel, rather than through all the examples.* In other words, I don't think the curve represents a quadratic regression curve attempting to fit all the tool steel points. If true, then I suspect that T15 is not necessarily a laggard that's "behind the curve," I'm guessing (trying to fit a regression curve by eye, yes, dangerous) that T15 is probably about where you'd expect it to be for toughness, given its CATRA scores. Bested by Vanadis 8, but outshining Rex 76, in this graphic.
*A little confusing since the stainless steel curve appears to be more in the swarm of points. But I'm still guessing these are not regression-fit curves, since Dr. Thomas didn't include the formula for the line. If they were regression curves they'd probably have a formula attached.
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Re: Anticipation of: CPM REX T15 in MT34
Intervention time. Are the carbides in the room with you now?Tucson Tom wrote: ↑Wed Feb 08, 2023 9:30 pmInteresting that Rex45 and Rex76 are close neighbors on that chart. Two of my absolute favorite steels.
I used to cry every night that there was no Rex-45 mule, but the Rex-76 mule took all the tears away.
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Re: Anticipation of: CPM REX T15 in MT34
Maybe you have to show proof of diamond sharpener before you buy a mule in these type of steels :)
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- standy99
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Re: Anticipation of: CPM REX T15 in MT34
Got to be dropping soon…….
Im a vegetarian as technically cows are made of grass and water.
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Re: Anticipation of: CPM REX T15 in MT34
I cannot speak to your other points, but I do find it curious that many peoples favorite steels fall right in between the two curves.Bolster wrote: ↑Sat Jan 07, 2023 11:32 amRe-upping one of Dr. Larrin's graphics that gives some context for T15. IIRC, Larrin drew the curves in the neighborhood of the best examples of tool steel, rather than through all the examples.* In other words, I don't think the curve represents a quadratic regression curve attempting to fit all the tool steel points. If true, then I suspect that T15 is not necessarily a laggard that's "behind the curve," I'm guessing (trying to fit a regression curve by eye, yes, dangerous) that T15 is probably about where you'd expect it to be for toughness, given its CATRA scores. Bested by Vanadis 8, but outshining Rex 76, in this graphic.
*A little confusing since the stainless steel curve appears to be more in the swarm of points. But I'm still guessing these are not regression-fit curves, since Dr. Thomas didn't include the formula for the line. If they were regression curves they'd probably have a formula attached.
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