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<p>[QUOTE=&quot;Lehigh96, post: 448757, member: 15309&quot;]Ruben,</p><p><br /></p><p>I don&#039;t know if you are still blocking my posts, but if you can see this I want you to know I don&#039;t want to rekindle a flame war and I don&#039;t mean to be argumentative.&nbsp; However, I do have a question.</p><p><br /></p><p>Metals are amorphous in a liquid state and form a cyrstalline lattice structure when solidified.&nbsp; To the best of my knowledge, both Ag and Cu are FCC (Face Centered Cubic) and I believe that silver-copper alloys are also FCC.&nbsp; Are you saying that the minting process makes the surface of the coin amorphous?&nbsp; I can&#039;t be 100% certain, but that concept seems inconsistent with my understanding of metallurgy.</p><p><br /></p><p>The coining process is an example of cold forming which is basically the same as work hardening.&nbsp; Work hardening typically results in an increase in yield strength and decrease in ductility which are both good for the overall survival of a soft metal coin (eg Ag or Au coins).</p><p><br /></p><p>Like I said, I can&#039;t be 100% sure because silver is not an engineering material other than some very specific applications, but overall properties of metals do not vary that much.</p><p><br /></p><p>Paul[/QUOTE]</p><p><br /></p>

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