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<p>[QUOTE=&quot;Oldhoopster, post: 3179718, member: 84179&quot;]I believe [USER=90102]@TheFinn[/USER] is correct about the manganese. There were many articles in the coin publications leading up to the release of the Sacajawea dollar. I recall reading that the Mn was added to keep the electronic properties the same as the clad SBA to appease the vending machine industry. It had nothing to do with the strength or wear resistance of the alloy. And it had nothing to do with corrosion resistance as evidenced by the rapid discoloration of the alloy[/QUOTE]</p><p><br /></p>

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