A spectrographic method has been developed for the determination of the following elements, in the given concentration ranges, in aluminum alloys: manganese 0.01-0.8%, iron 0.1-6.0%, magnesium 0.1-2.0%, copper 0.3-10.0%, zinc, 0.03-5.0%, silicon 0.1-6.0%, chromium 0.02-0.4%, nickel
0.02-0.6%, titanium 0.01-0.1%, lead 0.01-1.0%, calcium 0.1-2.0%. The standard errors of estimate, calculated for each of the working curves used, range from 11.4% to 14.0%. The method has proven itself highly satisfactory for the classification of unknown types of aluminum alloys and, to a
limited extent, in specification analyses. It is versatile since it can be applied to a sample of any size, shape or metallurgical history.
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