Brass Annealing Guide
- Reloading Depot
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Yes, I'm very sure.Are you sure about 650C . all I have ever saw was to get 750F Templac to determin you target temp. 650c is 1200 deg f. I would think that would fry the cartridge.
I've heard all that about 650°F and 750°F and would do annealing with that too since those numbers are so often stated is various shooting forums. Then I came across actual research papers and found that what appears to have happened is like what happens in the telephone game and what was supposed to be Centigrade was stated as Fahrenheit.
That's right. . .650°C is at 1,200°F and that's were you see the brass glow red. It's not going to fry your brass as you might think as you're really only dealing with a second or so at that temperature (it's not like you get to that temperature instantly). Remember, the annealing process is a function of both temperature and time; very hot for short period less hot for much longer period.
Here's a pic that give you some idea of color to temperature for brass:
I'm attaching a couple pdf files about some studies that you can read through if you're so inclined. Or just take a quick look on page 24 of Ryan-Stevenson Dissertation file and page 5 of Recrystallization Behavior.
Note too there's been a couple test engineers on this website that have also tested this and had actual lab testing done for hardness of the brass cases. They found the same thing I found in my own testing.
PS: What inspired me to look more deeply into this issue was when someone posted their AMP machine annealing their brass and I saw how very red the case necks got, even for just a fraction of a second. It was obviously way hotter than what I was doing at 650°F (only 340°C).