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<p>[QUOTE=&quot;robp, post: 8163276, member: 96746&quot;]As per the conversation I had with Graham Dyer a few year ago and posted on the Predecimal forum, he said forget the denomination. These strikes were all about testing a metal mix and not necessarily struck in the year indicated - just like my sample half-crown in steel which he said was made in the early 1980s, long after the halfcrown ceased to be relevant. You really need it out of the slab and do a proper test to determine the metal content. The XRF below wasn&#039;t run against a standard, but will be approx. correct for alloy content.</p><p>[ATTACH=full]1425046[/ATTACH]</p><p><br /></p><p><br /></p><p>RONTEC EDWIN WinTools&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; HALFCR&nbsp; &nbsp; 02.09.2009 (13:07)</p><p><br /></p><p>NT vers: 3.2 eng&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Eo:25.0 keV&nbsp; (TO:35.0&nbsp; TI: 0.0)</p><p><br /></p><p>*** PUzaf results ***</p><p><br /></p><p>elem/line____P/B______B_______F________c______c(100%)__%error__h_</p><p><br /></p><p>Cr K-alpha&nbsp; &nbsp; 116.4&nbsp; &nbsp; &nbsp;&nbsp; 1.03867&nbsp;&nbsp; 1.38738&nbsp; &nbsp;&nbsp; 10.74&nbsp; &nbsp; &nbsp;&nbsp; 12.31&nbsp; &nbsp; &nbsp; &nbsp; 17.4&nbsp; *</p><p><br /></p><p>Mn K-alpha&nbsp; &nbsp; &nbsp;&nbsp; 5.7&nbsp; &nbsp; &nbsp;&nbsp; 1.04072&nbsp;&nbsp; 1.09146&nbsp; &nbsp; &nbsp;&nbsp; 0.68&nbsp; &nbsp; &nbsp; &nbsp; 0.78&nbsp; &nbsp; &nbsp; &nbsp; 64.7</p><p><br /></p><p>Fe K-alpha&nbsp; &nbsp;&nbsp; 597.5&nbsp; &nbsp; &nbsp; 1.04269&nbsp;&nbsp; 1.02462&nbsp; &nbsp; &nbsp; 75.79&nbsp; &nbsp; &nbsp; 86.91&nbsp; &nbsp; &nbsp; &nbsp; 14.7</p><p><br /></p><p>[ATTACH=full]1425050[/ATTACH]</p><p>Can&#039;t get the numbers to line up, but the important figures are 12.31% Cr, 0.78% Mn and 86.91% Fe.[/QUOTE]</p><p><br /></p>

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