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<p>[QUOTE=&quot;Lehigh96, post: 673053, member: 15309&quot;]That would be one serious quality control problem by the metal alloy manufacturer.&nbsp; Alloys are created by mixing metals in either large arc furnaces or smaller induction furnaces.&nbsp; Heat sheets are prepared by the metallurgists and followed by the furnace operator.&nbsp; To achieve an improper mixing of alloys that badly, you would have to almost disregard the heat sheet entirely.&nbsp; In the plant that I worked in, every heat produced had a sample taken which was sent to the lab for quality control.&nbsp; If the sample did not meet the requirements, the entire heat was turned into remelt.</p><p><br /></p><p>Once the metal is cast it has to undergo an extrusion process to turn it into a sheet before the blank planchets can be stamped out.&nbsp; My guess is that this planchet error occurred during the extrusion process but is not related to improper alloy mixture.&nbsp; It almost appears as if the roller marks have been etched into the surface of the coin.&nbsp; I don&#039;t know how that would have happened.&nbsp; Maybe a whole batch of planchets were improperly washed and somehow this one slipped by.[/QUOTE]</p><p><br /></p>

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