...of them I TRULY thought some machine part or something like the Rockwell or Vickers test marks. Anyway, I've rambled enough and just wanted to...
...of the die. They would check the hardness on the side using the Rockwell “C” scale which uses a diamond shaped indenter (instead of the 1/16”...
Having worked in a mint, the Rockwell testing is done on the side, not the face of the die.
The Rockwell Test is not used on Dies, before or after anything.
Who are you responding to? I am sure the mint also checks the hardness of the dies to verify they are properly annealed prior to hubbing and...
The Rockwell Tests, in the US Mint, are done on planchets, NOT on Dies.
Here is what a Rockwell 15T hardness indent looks like on a zinc and copper cent (after striking).
Yeah, that is not a Rockwell hardness indent, either before or after striking. I can do a 15T Rockwell hardness test on a zinc cent to show you...
...were to make it to the minting process. I would expect the Rockwell test to be performed as part of an incoming inspection. In many...
:) I understand the process completely. Yes they take it from the mint to do a test for hardness. Perhaps you should reread what I wrote. Or if...
The Rockwell test is performed on a planchet. The planchet itself is removed outside of the entire minting process in order to perform the test....
Yes, I mentioned that earlier. They are common in metal testing, and you can buy one yourself if you wanted too. Or you can emulate it quite...
I know what it stated. I'm not a metallurgist, but I think their statements are incorrect. So does Fred. Once again, the strike area would have...
...It seems to me that if one wanted to know if it was an accurate Rockwell test coin. You would have to send it in. Not sure if it would be worth...
Hi:) So if yours was a Rockwell test coin . Then that would be a perfect strike. With no extra indentation from a slightly miss strike. On the...
The odd part, if you look at the pictures you'll see one of their "rockwell test" in a design element. So did the test mark RAISE with the...
...your thread quite interesting.so I did a quick research on the Rockwell test. And found this bit of interesting information... (Such planchets...
BTW, the rockwell test is to confirm metal striking and flow test. Thus it is done before striking. If the material was well outside of the test...
...guys to check my math. I've done Vickers Indentation tests but never did Rockwell on metals. The small penetration depth makes sense, however.
...and pushed the metal around, would totally obliterate any Rockwell test. If seen, it would be totally deformed at best. Additionally, This...
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