- Joined
- Jul 29, 2014
- Messages
- 8
You aren't going by temperature solely. Turn the lights down and watch for the orange flame, when you see this flame that means the brass has gotten to hot.
Thanks for the video Dj. Very instructive wrt reading colors. When visual observation is all we have to go on the video is a good guide for that.
However, I would not be comfortable using so much heat as in the video. If exposure time is only 3.5 to 4 seconds then the brass only reaches annealing temperature for a split second. If such little exposure is enough to anneal it then it had to get critically close to over heating. When a half second of exposure to the flame makes such a difference control of time in flame has to be very precise.
Since annealing is a question of duration at temperature, a slower heating rate would suit me better. I would either turn the torches down or use just one torch. Things would happen more slowly and if given more time in the heat the brass would not have to get as hot. But that is just me.
On page 30 of the publication mentioned in post 13 there is a paragraph on stress relieving. This occurs at temperatures below annealing temperatures and seems to have some benefit for reloaders. This would be a reason to go easy on the annealing temperature because 'under' annealing still has benefits but over annealing destroys the brass for our purposes.