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Rifles, Reloading, Optics, Equipment
Reloading
Annealing before or after sizing?
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<blockquote data-quote="A/C Guy" data-source="post: 1952561" data-attributes="member: 13490"><p>Annealing only occurs at a temperature hotter than you could hold the brass.</p><p>The base will get too hot to handle. That is one reason the case in the pan of water technique was started. The water also prevented the base from getting too soft/ annealed while heating the neck.</p><p></p><p>Dousing the case in water TEMPERS the brass. While it is similar to annealing, it is not the same.</p><p></p><p>[URL unfurl="true"]https://www.brighthubengineering.com/manufacturing-technology/74097-heat-treatment-annealing-and-tempering/[/URL]</p><p></p><p>The critical temperature for annealing brass is almost 700˚, heating the brass to 600˚ for an hour will anneal the brass. The closer you get to 700˚ without going over the quicker the anneal process occurs. Annealing requires time for the grain structure to align properly, it can not be rushed. Dropping the case in water tempers the case, similar to annealing, but not the same. For maximum consistency, anneal, not temper the case mouth/neck. Tempering will give inconsistent neck tensions and increase your standard deviation.</p></blockquote><p></p>
[QUOTE="A/C Guy, post: 1952561, member: 13490"] Annealing only occurs at a temperature hotter than you could hold the brass. The base will get too hot to handle. That is one reason the case in the pan of water technique was started. The water also prevented the base from getting too soft/ annealed while heating the neck. Dousing the case in water TEMPERS the brass. While it is similar to annealing, it is not the same. [URL unfurl="true"]https://www.brighthubengineering.com/manufacturing-technology/74097-heat-treatment-annealing-and-tempering/[/URL] The critical temperature for annealing brass is almost 700˚, heating the brass to 600˚ for an hour will anneal the brass. The closer you get to 700˚ without going over the quicker the anneal process occurs. Annealing requires time for the grain structure to align properly, it can not be rushed. Dropping the case in water tempers the case, similar to annealing, but not the same. For maximum consistency, anneal, not temper the case mouth/neck. Tempering will give inconsistent neck tensions and increase your standard deviation. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Annealing before or after sizing?
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