Annealing my own brass,... look ok?

[Webster]

Webster: these graphs indicate that softening (annealing ) at 21-28 % CW does seem to be quick at 600C-700C. In a few seconds the HR drops to 80-85 “H” scale which correlated to about 20 “B” scale. Pretty soft. The grain diameter seems to start growing in a few seconds at 700C.

As for reaching 28% cold work, somewhere I did a “back of the envelope” accumulation for a 223. It was between 12 and 14 % accumulated cold work per firing cycle. Repeat 3 times and you’re at 45% accumulated CW.

Found it.

CW

,ID as fired, ID sized No exp, ID after Exp, Firing, Sizing, Expanding, Total CW per cycle, cycles to get 50% CW, cycles to get 40% CW
Make 1, 0.228, 0.213, 0.221, 0.031674,0.065789, 0.037559, 13.5%, 3.7, 3.0
Make 2, 0.231, 0.216, 0.221, 0.045249, 0.064935, 0.023148, 13.3%, 3.8, 3.0

In this table, (it might need to be reformatted) I attempted to see how much cold work was in a typical firing reloading cycle. It isn't too severe ,maybe 14% per cycle. This means that you need 3 cycles to get 40% cold work where annealing seems to have some effect.

Where the CW is defined as (Big Dia-Small Dia)/Starting Dia (Starting dia isthe dia large or small prior to the transformation).

700C = 1292F. I think 99% of us are doing just fine annealing. It's not really complicated.

 

[rsbhunter]

Not earth shaking news, but, I found that the silicone bread/baking pans make great annealed case catchers, if needed aim a small fan into it.....learned about microfiber , cotton, etc cooling platforms, the hard way..just an fyi.....Rsbhunter