HRC Database

Discuss Spyderco's products and history.
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SteveMidwest
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Re: HRC Database

Postby SteveMidwest » Tue Dec 24, 2019 10:28 pm

legOFwhat? wrote:
Sun Dec 22, 2019 11:38 am
I'd be super curious to know what the PD#1 Mules hrc would come in at. I wonder how close to the cpm-cruwear mule it would be ;)

I keep a list Larry, of all of the testing I have done, on my knives.
Here are a few excerpts >

PD#1 Mule - 63 HRC
Cruwear Mule - 62 HRC
Cruwear PM 2 - 62 HRC
Cruwear Para 3 - 61.7

Which has me scratching my head. I must not have tested any of my Manix 2 knives in Cruwear yet? I find that odd. Though I don't test all of my knives. The oldest one of those, could be about 5 or 6 years old now?
I have also not yet tested my Shaman Cruwear Micarta. :spyder:

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legOFwhat?
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Re: HRC Database

Postby legOFwhat? » Tue Dec 24, 2019 11:21 pm

SteveMidwest wrote:
Tue Dec 24, 2019 10:28 pm
legOFwhat? wrote:
Sun Dec 22, 2019 11:38 am
I'd be super curious to know what the PD#1 Mules hrc would come in at. I wonder how close to the cpm-cruwear mule it would be ;)

I keep a list Larry, of all of the testing I have done, on my knives.
Here are a few excerpts >

PD#1 Mule - 63 HRC
Cruwear Mule - 62 HRC
Cruwear PM 2 - 62 HRC
Cruwear Para 3 - 61.7

Which has me scratching my head. I must not have tested any of my Manix 2 knives in Cruwear yet? I find that odd. Though I don't test all of my knives. The oldest one of those, could be about 5 or 6 years old now?
I have also not yet tested my Shaman Cruwear Micarta. :spyder:
Thank you Steve for taking the time to look that up! Very respectful number, I have four or five I use and haven't had any problem keeping them sharp and they stay that way for a good while. Surprised they still have them left. If I get a chance I'll get a couple more before they're all gone.
-Larry

failure is necessary.

The Meat man
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Re: HRC Database

Postby The Meat man » Sat Jan 11, 2020 7:34 pm

I'd be interested in seeing more hardness numbers with regard to H-1.

I have a very hard time believing that the edge is as hard as Maxamet (65 HRC +). I'd like to see some more independent hardness testing done.
- Connor

"You live and learn. At any rate, you live."

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Re: HRC Database

Postby The Meat man » Sat Jan 11, 2020 9:03 pm

The Meat man wrote:
Sat Jan 11, 2020 7:34 pm
I'd be interested in seeing more hardness numbers with regard to H-1.

I have a very hard time believing that the edge is as hard as Maxamet (65 HRC +). I'd like to see some more independent hardness testing done.

Don't know how I forgot Larrin's excellent article on H-1. In the article he had a Spyderco Salt measured and found it to vary from about 55-57 HRC. Might want to add that to the list.
- Connor

"You live and learn. At any rate, you live."

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ZrowsN1s
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Re: HRC Database

Postby ZrowsN1s » Sun Jan 12, 2020 3:21 pm

In regards to the H-1 numbers, I would be sceptical if they hadn't come from Sal and Spyderco. I trust their numbers.
Carrying 3 knives is perfectly normal :D
-Matt

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Re: HRC Database

Postby The Meat man » Sun Jan 12, 2020 3:30 pm

ZrowsN1s wrote:
Sun Jan 12, 2020 3:21 pm
In regards to the H-1 numbers, I would be sceptical if they hadn't come from Sal and Spyderco. I trust their numbers.
As I understand it, those numbers didn't originate with Spyderco but were from a third party tester. I'll try to find Sal's quote indicating that. In any event I think Larrin's numbers are just as valid.

I'm no metallurgist but I do use my knives, and H-1 in my experience just does not behave like a 65+ HRC steel.
- Connor

"You live and learn. At any rate, you live."

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SteveMidwest
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Re: HRC Database

Postby SteveMidwest » Sun Jan 12, 2020 4:35 pm

Spyderco Manix 2 Foliage Green CTS-XHP C101GFGXHPP2 (Date Code 'CJ' - March 2010) - 62 HRC :spyder:

Spyderco Manix 2 Earth Brown DLC M390 C101GPBNBK2 (Date Code 'JS' - Oct. 2019) - 61 HRC / 61.8 HRC :spyder:

:D

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Cambertree
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Re: HRC Database

Postby Cambertree » Mon Jan 13, 2020 6:54 am

The Meat man wrote:
Sun Jan 12, 2020 3:30 pm
ZrowsN1s wrote:
Sun Jan 12, 2020 3:21 pm
In regards to the H-1 numbers, I would be sceptical if they hadn't come from Sal and Spyderco. I trust their numbers.
As I understand it, those numbers didn't originate with Spyderco but were from a third party tester. I'll try to find Sal's quote indicating that. In any event I think Larrin's numbers are just as valid.

I'm no metallurgist but I do use my knives, and H-1 in my experience just does not behave like a 65+ HRC steel.
From memory they were from Crucible, and an important distinction to make is they were microhardness tests, so presumably not Rockwell C tests. I'm no expert on steel hardness tests, but they may have been Knoop tests.

Knifegrinders in New South Wales, Australia did some interesting microhardness testing of burrs in cross section, and found that the root of a burr can run a bit harder than the nominal blade hardness, presumably from work hardening on a very small scale.

I wonder if a similar effect may be at work, right near the apex of H1, given its propensity to burr very easily.

In any case when Sandvik did their RC test they actually found a reduction in hardness near the edge. I believe that was on a PE H1 knife. I recall that maybe Larrin was going to look into hardness measurements for SE H1 some time in the future?

In any case, I agree with Connor - I'm not saying SE H1 isn't good stuff, but none of my SE H1 knives feel anything like a 65-66 HRC knife on the stones.
Last edited by Cambertree on Tue Jan 14, 2020 1:26 am, edited 1 time in total.

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ZrowsN1s
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Re: HRC Database

Postby ZrowsN1s » Mon Jan 13, 2020 8:13 am

I'd be curious if some kind of scratch test could be done with an object if similar hardness.
Carrying 3 knives is perfectly normal :D
-Matt

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Deadboxhero
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Re: HRC Database

Postby Deadboxhero » Mon Jan 13, 2020 10:27 pm

ZrowsN1s wrote:
Mon Jan 13, 2020 8:13 am
I'd be curious if some kind of scratch test could be done with an object if similar hardness.
Nope
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ZrowsN1s
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Re: HRC Database

Postby ZrowsN1s » Tue Jan 14, 2020 11:06 pm

Deadboxhero wrote:
Mon Jan 13, 2020 10:27 pm
ZrowsN1s wrote:
Mon Jan 13, 2020 8:13 am
I'd be curious if some kind of scratch test could be done with an object if similar hardness.
Nope
SE H1 wont scratch 68? Any idea what it will?
Carrying 3 knives is perfectly normal :D
-Matt


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