Sakamura,
First, welcome to BAUT.
Second, maybe the sample is unusual. But an unusual aluminum alloy sample of terrestial origin may not be worth further testing - what is the point? Does one need to determine, for example, that it was some reject material from an industrial process, or someone's weird lab experiment? Testing costs money and time - at this point, what is the point.
By the way, what is a "Cr analysis"? I assume you don't mean chromium, since it was analyzed for that.
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