Call for Charpy toughness samples

Warren, you are a machine!

I have been busy over the holidays, but I now have 40 samples cut out of .118 AEB-L, with the first of three batches pre-ground to 1 mm oversized and scheduled to be heat treated tomorrow. The other two runs will be pre-ground and probably heat treated sometime later this week.20190106_163332.jpg

Warren, I like your database, came up with something similar. If you want to be the keeper of record I can forward info to you in whatever format you desire. 20190106_163343.jpg

Larrin, do you have some suggestions on A2 heat treatments you would like to see?

Happy New Year, All!

Michael
 
Michael.Drinkwine said:
Warren, you are a machine!

I have been busy over the holidays, but I now have 40 samples cut out of .118 AEB-L, with the first of three batches pre-ground to 1 mm oversized and scheduled to be heat treated tomorrow. The other two runs will be pre-ground and probably heat treated sometime later this week.View attachment 1049605

Warren, I like your database, came up with something similar. If you want to be the keeper of record I can forward info to you in whatever format you desire. View attachment 1049604

Larrin, do you have some suggestions on A2 heat treatments you would like to see?

Happy New Year, All!

Michael
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I offered to keep the records and Larrin agreed. I’m going to start a thread just for keeping track once I get the database completed with all conditions so far.
 
If anyone else wants the excel file, send me an e-mail, and Ill send it to you.

Warren
 
This will be interesting to see what you get. A few years back, some of us were discussing going off of the industry standard recipe for certain steels, I believe in the context of low austenized 52100. Mr. Cashen remarked that although some steels like 52100 and D2 (and CPM 3V, Elmax and others. as we know now) can be "played" with, with other steels, you have to "take what the chemistry will give you" I may be wrong, but I think that he used A2 as an example of the latter.
Larrin said:
A2: 1750F, 500F for max toughness at 60-61 Rc. Can try lower temper for higher hardness.
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I’m not sure I agree with that sentiment exactly, especially not with those examples. Maybe in context we would find more agreement.
 
Which ones don't you agree with?
High hardness Elmax, Delta 3V, low austenized 52100, Dozier D2, do not act a bit different than their counterparts done to the "industry standard?"
Larrin said:
I’m not sure I agree with that sentiment exactly, especially not with those examples. Maybe in context we would find more agreement.
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jdm61 said:
Which ones don't you agree with?
High hardness Elmax, Delta 3V, low austenized 52100, Dozier D2, do not act a bit different than their counterparts done to the "industry standard?"
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Similar to the z-wear testing too. Cryo/low temper is good for us knifemakers.
 
I can’t think of any reasons why D2 would be possible to manipulate but not A2.
 
jdm61 said:
This will be interesting to see what you get. A few years back, some of us were discussing going off of the industry standard recipe for certain steels, I believe in the context of low austenized 52100. Mr. Cashen remarked that although some steels like 52100 and D2 (and CPM 3V, Elmax and others. as we know now) can be "played" with, with other steels, you have to "take what the chemistry will give you" I may be wrong, but I think that he used A2 as an example of the latter.
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Do you know the Dozier D2 protocol off hand?
 
I am merely the messenger. :D What I do see in the charts is that the toughness performance of A2 appears drop off drastically if you get above that 60Rc "sweet spot."
Larrin said:
I can’t think of any reasons why D2 would be possible to manipulate but not A2.
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Warren, would you like a couple of little pieces of Admiral 9260? 1 x 1/4 hot rolled round edge flat bar.
 
I am not trying to be argumentative, since the statement came from another person it’s probably better to ask him separately.
 
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