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<p>[QUOTE=&quot;Vern, post: 29017, member: 347&quot;]I actually paid for two.&nbsp; One on the filings from the wheel itself and one on a pin so I could match the brass if I wanted to have replacements done.&nbsp; They tested the filings twice because they weren&#039;t expecting to see those results either.&nbsp; Both tests were nearly identical.</p><p><br /></p><p>The density, color, malleability, oxidation, and corrosion stress fracture are consistent with a low percentage gold/copper alloy, too.</p><p><br /></p><p>The test was done at Oxford Assaying and Refining where I bring gold I mine to sell.&nbsp; I trust them.&nbsp; At fifty dollars a shot though, two tests are enough for me. I guessed it was a copper/silver alloy before the test.&nbsp; I have to admit, I was not expecting any gold at all in the alloy.&nbsp; Before the paint was removed I thought it was iron fly wheel due to the weight…</p><p><br /></p><p>This paper is one of several on fracturing of copper/gold alloys. In general it is thought that when the %Au in these alloys is less than 40ish, fracturing becomes possible and much more prevalent the lower that percentage goes.&nbsp; </p><p><br /></p><p><a href="http://www.researchgate.net/publication/238363133_Stress_corrosion_cracking_of_18_carat_gold" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.researchgate.net/publication/238363133_Stress_corrosion_cracking_of_18_carat_gold" rel="nofollow">http://www.researchgate.net/publication/238363133_Stress_corrosion_cracking_of_18_carat_gold</a>[/QUOTE]</p><p><br /></p>

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