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Strike Through? 1942-S 5C.
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<p>[QUOTE="Insider, post: 2528010, member: 24314"]Unfortunately SuperDave has me on "ignore" so this post will not be of any educational value to him. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie8" alt=":D" unselectable="on" unselectable="on" /><img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie52" alt=":hilarious:" unselectable="on" unselectable="on" /><img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie52" alt=":hilarious:" unselectable="on" unselectable="on" /><img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie52" alt=":hilarious:" unselectable="on" unselectable="on" /><img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie52" alt=":hilarious:" unselectable="on" unselectable="on" /><img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie52" alt=":hilarious:" unselectable="on" unselectable="on" /><img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie52" alt=":hilarious:" unselectable="on" unselectable="on" /> That's too bad. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie3" alt=":(" unselectable="on" unselectable="on" /> </p><p><br /></p><p><span style="color: #b300b3">My reply</span>:</p><p><br /></p><p>SD posted: "My initial impression is of two different materials being involved here. <span style="color: #b300b3">To which I agree. Two different causes also. </span>On the steps, whatever got stuck there was of a hardness near that of, or exceeding, nickel <span style="color: #b300b3">Actually there is no way to tell this.</span>- that's the only way sharp edges could appear. <span style="color: #b300b3">Sharp, split away edges </span><span style="color: #ff0000"><u><i><b>DO NOT EVER</b></i></u></span><span style="color: #b300b3"> appear on struck thru errors. That is because the object or substance is pushed DOWN into the surface of the planchet rounding the edges. </span>The nickel would "round" the edges of contact for anything softer than it.</p><p><br /></p><p>I contemplated the possibility of lamination rather than strike through, and decided not because of the sizable depth <span style="color: #b300b3">This is not a factor. Although most laminations are shallow their depth depends on how deep the impurity was in the strip. </span>(another point in favor of something really hard) compared to the surface size - laminations are generally broader and thinner.<span style="color: #b300b3">Actually, laminations come in all sizes and they are mostly small, strips of peeling metal still basically level with the surface.</span></p><p><br /></p><p>The lower piece could have been <span style="color: #ff0000">wire </span><span style="color: #b300b3">(This is </span><span style="color: #006633">EDIT</span><span style="color: #b300b3"> <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie14" alt=":angelic:" unselectable="on" unselectable="on" />, with his experience, he should know better than this)</span>,could have been <span style="color: #ff0000">string </span><span style="color: #b300b3">(This is also </span><span style="color: #006600">EDIT <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie14" alt=":angelic:" unselectable="on" unselectable="on" />. </span><span style="color: #b300b3">Can you tell me why?)</span>, could have been softer metal which the nickel kind of forced into shape during the strike <span style="color: #b300b3">(could be)</span>. Keep in mind, steel has to be specially hardened to be harder than nickel <b>at all</b> - nickel is harder than soft steel. That's one reason why the Mint had such difficulty learning to strike nickel - their die steel was very little harder than the planchet at the time. The Bessemer Process (and therefore "modern" steel) was less than ten years old at the time the Mint started striking 3CN's.[/QUOTE]</p><p><br /></p>
[QUOTE="Insider, post: 2528010, member: 24314"]Unfortunately SuperDave has me on "ignore" so this post will not be of any educational value to him. :D:hilarious::hilarious::hilarious::hilarious::hilarious::hilarious: That's too bad. :( [COLOR=#b300b3]My reply[/COLOR]: SD posted: "My initial impression is of two different materials being involved here. [COLOR=#b300b3]To which I agree. Two different causes also. [/COLOR]On the steps, whatever got stuck there was of a hardness near that of, or exceeding, nickel [COLOR=#b300b3]Actually there is no way to tell this.[/COLOR]- that's the only way sharp edges could appear. [COLOR=#b300b3]Sharp, split away edges [/COLOR][COLOR=#ff0000][U][I][B]DO NOT EVER[/B][/I][/U][/COLOR][COLOR=#b300b3] appear on struck thru errors. That is because the object or substance is pushed DOWN into the surface of the planchet rounding the edges. [/COLOR]The nickel would "round" the edges of contact for anything softer than it. I contemplated the possibility of lamination rather than strike through, and decided not because of the sizable depth [COLOR=#b300b3]This is not a factor. Although most laminations are shallow their depth depends on how deep the impurity was in the strip. [/COLOR](another point in favor of something really hard) compared to the surface size - laminations are generally broader and thinner.[COLOR=#b300b3]Actually, laminations come in all sizes and they are mostly small, strips of peeling metal still basically level with the surface.[/COLOR] The lower piece could have been [COLOR=#ff0000]wire [/COLOR][COLOR=#b300b3](This is [/COLOR][COLOR=#006633]EDIT[/COLOR][COLOR=#b300b3] :angelic:, with his experience, he should know better than this)[/COLOR],could have been [COLOR=#ff0000]string [/COLOR][COLOR=#b300b3](This is also [/COLOR][COLOR=#006600]EDIT :angelic:. [/COLOR][COLOR=#b300b3]Can you tell me why?)[/COLOR], could have been softer metal which the nickel kind of forced into shape during the strike [COLOR=#b300b3](could be)[/COLOR]. Keep in mind, steel has to be specially hardened to be harder than nickel [B]at all[/B] - nickel is harder than soft steel. That's one reason why the Mint had such difficulty learning to strike nickel - their die steel was very little harder than the planchet at the time. The Bessemer Process (and therefore "modern" steel) was less than ten years old at the time the Mint started striking 3CN's.[/QUOTE]
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