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Detecting aluminum 4043 versus 4046 or 4047

Hello all and thank you for your consideration -

I need to non-destructively tell between Al 4043 weld wire and 4046 or 4047 (not sure which). This will be in-factory on already welded Al 6061 tubing parts. The weld bead is fairly small i.e. 1/4 inch maybe.

My first instinct is XRF, however the alloys I mention depend heavily on the ability to analyze the Si content and this can be tricky in the field.

Do any of you know other tricks that are non-destructive? example maybe hardness, conductivity, spot test?

thanks much

Terry Tomt
Chemist - Auburn, WA
November 8, 2009

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