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<p>[QUOTE="Michael K, post: 2820173, member: 78298"]I don't see how oxidation of a clad would magnetize it.</p><p>The only pure metallic elements that are "magnetic", in the sense that they will stick to a magnet, are iron, cobalt and nickel. Almost-pure alloys of any of these elements should be magnetic, too.</p><p>Steel has iron in it. </p><p>But the clad quarters are mostly copper, the core being copper and the outer layers being 75% copper and 25% nickel. Not enough nickel to be magnetic.</p><p>Please show a photo of this coin sticking to a magnet.[/QUOTE]</p><p><br /></p>
[QUOTE="Michael K, post: 2820173, member: 78298"]I don't see how oxidation of a clad would magnetize it. The only pure metallic elements that are "magnetic", in the sense that they will stick to a magnet, are iron, cobalt and nickel. Almost-pure alloys of any of these elements should be magnetic, too. Steel has iron in it. But the clad quarters are mostly copper, the core being copper and the outer layers being 75% copper and 25% nickel. Not enough nickel to be magnetic. Please show a photo of this coin sticking to a magnet.[/QUOTE]
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