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Rifles, Reloading, Optics, Equipment
Reloading
Annealing: Specific Heat Question
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<blockquote data-quote="VenatusDominus" data-source="post: 2738291" data-attributes="member: 117869"><p>There are multiple studies demonstrating no measurable changes in cartridge brass held at 750F for 30 min. In order to return the neck/shoulder of a cartridge to its factory state, you need to apply enough heat for enough time to stress relieve the neck /shoulder. If the heat is to low, then the time required allows the heat to propagate down the brass and soften the body and base (bad). This means the anneal time needs to be kept to seconds. In order to return the brass to its virgin, factory state your neck/ shoulder needs to get north of 1050F for several seconds. Coincidentally, this is the temp at which brass begins to glow. This is very achievable with commonly used flame and induction annealers. This is impossible with a salt bath at 850F. At least that is what the scientific studies demonstrate.</p></blockquote><p></p>
[QUOTE="VenatusDominus, post: 2738291, member: 117869"] There are multiple studies demonstrating no measurable changes in cartridge brass held at 750F for 30 min. In order to return the neck/shoulder of a cartridge to its factory state, you need to apply enough heat for enough time to stress relieve the neck /shoulder. If the heat is to low, then the time required allows the heat to propagate down the brass and soften the body and base (bad). This means the anneal time needs to be kept to seconds. In order to return the brass to its virgin, factory state your neck/ shoulder needs to get north of 1050F for several seconds. Coincidentally, this is the temp at which brass begins to glow. This is very achievable with commonly used flame and induction annealers. This is impossible with a salt bath at 850F. At least that is what the scientific studies demonstrate. [/QUOTE]
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Annealing: Specific Heat Question
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