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<p>[QUOTE=&quot;iPen, post: 2439369, member: 69760&quot;]We do know for a fact that from the primary source, the US Mint, from their 1944 director&#039;s report (below), that the zinc coating&#039;s thickness on either side is 0.0005&quot;, while the weight is 42.5 grains = 2.753954 grams. We can also physically measure the coin&#039;s thickness at 1.52mm, and the coin&#039;s diameter at 19.05mm.</p><p><br /></p><p>We can figure out the exact composition by a) math, b) documented evidence, or c) metal analyzer. I like (c) the best <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />. Does anyone have a metal analyzer they can shoot a cull 1943 steel penny with (beneath the zinc coating)?</p><p><br /></p><p>Also, if the US Mint did use low carbon steel, it&#039;s curious to know why the Mint would use a low carbon steel if it tends to rust more easily with its higher iron content.</p><p><br /></p><p>It&#039;s also interesting to see that the US Mint reports a weight of 42.5 grains or 2.753954 grams, yet many other sources state that it&#039;s 2.70 grams. Maybe someone measured one example at 2.70 grams a long time ago and that number stuck. Or maybe the &quot;.5&quot; grains was left out and 42 grains was converted to 2.72 grams and rounded to the nearest tenth. The same sources also seem to get the thickness wrong (off by one digit or off by 10 times at 0.005&quot; instead of 0.0005&quot;). Whatever the case, there&#039;s a disconnect between what the US Mint says and what other sources are saying. My uncirculated &#039;43 steel penny weighs 2.73 grams, so its weight is closer to what the US Mint states.</p><p><br /></p><p>[ATTACH=full]508046[/ATTACH][/QUOTE]</p><p><br /></p>

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