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Zawada NDT
Suppliers of instruments to test steel wire ropes in-situ, using magnetic, non-destructive method.
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Technical Discussions
Bob Wilson
Bob Wilson
06:01 Aug-25-2003
Conductivity Measurement Of Thin Aluminum

I'm a little confused by the requirement of MIL-STD-1537 with regards to "thin" aluminum, particularly clad less than .091...

As I read the spec, if my specimens are below minimum but greater than .6 times min, I have to stack. I'm then supposed to determine a thickness correction factor by averaging stacked and unstacked readings. Now (and here is where I'm confused), if the correction factor is less than 2.5, I can test individule specimens without stacking using my correction factor on the acceptance range. If the CF is greater than 2.5 but less than 5 I have to stack parts, and I don't use the correction factor. If the CF is greater than 5, I can't stack parts and I can't use a CF so I have to increase frequency and start the game again...
The "examples" in the spec are not very helpful. Any guidance would be greatly appreciated.


 
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