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Rifles, Reloading, Optics, Equipment
Reloading
Salt Bath Annealing Practical Experiment
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<blockquote data-quote="Matt F" data-source="post: 1655703" data-attributes="member: 110132"><p>Which Rockwell scale were you using? If it was the B scale, which is very common, then those Rockwell numbers convert to 184HV and 165HV respectively. This is within the range of harnesses the head of the case should be. (See this from the Norma site for example: <a href="https://www.norma-ammunition.com/en/Our-Products/components/Cases/" target="_blank">https://www.norma-ammunition.com/en/Our-Products/components/Cases/</a>) Also at that hardness you can expect to see some degree of error. (Unless these numbers are an average over multiple readings and over multiple cases with the same set conditions)</p><p></p><p>Rockwell is also not recommended when measuring thin or small work pieces due to the weights of the load and the diameter of the indent increasing the chance of measuring the anvil the piece is supported by or the surrounding resin the piece is mounted within.</p><p></p><p>This is why brass manufacturers use Vickers testers, including Norma as seen above, to test their brass hardness.</p></blockquote><p></p>
[QUOTE="Matt F, post: 1655703, member: 110132"] Which Rockwell scale were you using? If it was the B scale, which is very common, then those Rockwell numbers convert to 184HV and 165HV respectively. This is within the range of harnesses the head of the case should be. (See this from the Norma site for example: [URL]https://www.norma-ammunition.com/en/Our-Products/components/Cases/[/URL]) Also at that hardness you can expect to see some degree of error. (Unless these numbers are an average over multiple readings and over multiple cases with the same set conditions) Rockwell is also not recommended when measuring thin or small work pieces due to the weights of the load and the diameter of the indent increasing the chance of measuring the anvil the piece is supported by or the surrounding resin the piece is mounted within. This is why brass manufacturers use Vickers testers, including Norma as seen above, to test their brass hardness. [/QUOTE]
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