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International Annealed Copper Standard
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<h2 id="quality-of-aluminum-alloys">Quality of aluminum alloys</h2> <p><a href="/facts/Heat_treatment/xR2tVyTU">Heat treatment</a> will alter several properties of an alloy, many of which are important to a design engineer. A measurement of the electric conductivity of <a href="/facts/Aluminum_alloys/1EzR3Y4t">aluminum alloys</a> can be used to verify that a heat treatment process has been done correctly. For example a component made of "7075" alloy which was correctly treated with the process "T73" to gain resistance to <a href="/facts/Stress_corrosion_cracking/2ezVSAUP">stress corrosion cracking</a> will fall in the range of 38.0 to 43.0 % IACS.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> </p><p>The acceptance criteria for electrical conductivity of finished or semi-finished parts of wrought aluminum alloys are contained in <a href="/facts/SAE_International/cBS1MznQ">SAE International</a> specification AMS2658 Hardness and Conductivity Inspection of Wrought Aluminum Alloy Parts. Here the values are given in reference to the IACS. </p><p>A method for measuring electrical conductivity is described in <a href="/facts/ASTM_International/xzdCexYJ">ASTM International</a> specification ASTM E 1004 Electromagnetic (Eddy-Current) Measurements of Electrical Conductivity. Electrical conductivity meters with direct readout in %IACS are commercially available.<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> </p> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Copper Wire Tables (Technical report). Circular of the Bureau of Standards No.31 (3d ed.). United States Department of Commerce. October 1, 1914. <a href="https://archive.org/details/copperwiretables31unituoft" target="_blank">https://archive.org/details/copperwiretables31unituoft</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>"Resistivity and Conductivity Units Converter". <a href="https://zappitec.com/calculator" target="_blank">https://zappitec.com/calculator</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>"Stress Corrosion Cracking of Aluminum Alloys". Total Materia. June 2001. Retrieved 14 April 2016. <a href="http://www.totalmateria.com/Article17.htm" target="_blank">http://www.totalmateria.com/Article17.htm</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>"Eddy Current Conductivity Meter for Metals". Zappitec. Retrieved 26 September 2018. <a href="https://zappitec.com/products" target="_blank">https://zappitec.com/products</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> </ol>