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Rifles, Reloading, Optics, Equipment
Reloading
Annealing: Specific Heat Question
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<blockquote data-quote="VenatusDominus" data-source="post: 2732379" data-attributes="member: 117869"><p>The time temperature plot for annealing cartridge brass is an "S"curve. It is far better to "over do" than "under do" as under doing places you on the middle of the "S" curve where a small difference in time/temp can have huge swings in the amount of anneal/stress relief. If you over do, you are on the flat end of the "S" curve where even relatively large temp or time changes make very little difference in amount of anneal/stress relief. You just don't want to "over do" the point of melting the brass. This is precisely what the AMP annealer does in Aztec mode, it melts a case neck to figure out how much energy is required (there is a distinct change in input energy when the brass changes from solid to liquid) and then backs off the energy slightly to define the proper anneal setting. The Eric Cortina video posted earlier in this tread illustrates the fact that over annealing is not an issue.</p></blockquote><p></p>
[QUOTE="VenatusDominus, post: 2732379, member: 117869"] The time temperature plot for annealing cartridge brass is an "S"curve. It is far better to "over do" than "under do" as under doing places you on the middle of the "S" curve where a small difference in time/temp can have huge swings in the amount of anneal/stress relief. If you over do, you are on the flat end of the "S" curve where even relatively large temp or time changes make very little difference in amount of anneal/stress relief. You just don't want to "over do" the point of melting the brass. This is precisely what the AMP annealer does in Aztec mode, it melts a case neck to figure out how much energy is required (there is a distinct change in input energy when the brass changes from solid to liquid) and then backs off the energy slightly to define the proper anneal setting. The Eric Cortina video posted earlier in this tread illustrates the fact that over annealing is not an issue. [/QUOTE]
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Annealing: Specific Heat Question
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