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<p>[QUOTE=&quot;JPeace$, post: 2336845, member: 42727&quot;]I work for a metal cold roller.&nbsp; We buy material (Ti, SS, Ni, etc.) at 0.01&quot; thick in coil form and we are capable of reducing it via 20 high Z mills to 0.000085&quot; thick.&nbsp; In our world, work hardening occurs when you can no longer reduce the material and it becomes brittle.&nbsp; The danger with further reduction without a strip anneal is cracking, breaks etc.</p><p><br /></p><p>It&#039;s interesting to see this same term used when discussing pull away toning.&nbsp; You can certainly understand the stress points directly adjacent to the devices/details on the coin.&nbsp; I can &quot;see&quot; how these areas would tone differently due to the slight differences in the material at a microscopic level.[/QUOTE]</p><p><br /></p>

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