Hello, Thank you for using this service. I wish to introduce myself. I am a Research Librarian with 20+ years of experience.
While not a metallurgist, I did some research and came up with some definitions of this item. Not sure if there is an expert within the answer community so I wanted to at least get you something to work with. Here is what I was able to find for you:
Aluminum MLCAs with clips this is a very common mix of 1100, 3003, 3004, 5005, 5052, 6061 and 6063. Unlike clips, MLC is usually the thick solids instead of the thin clean sheets.
Let me know if this can be of some help as by rating my answer so that I can get a feel on if this can be useful.
The issue is now mute due to my finding another scrapyard that is willing to test and pay the listed scrap metal price for 6063. Actually, .05 more. That having been said, I feel you should be compensated for your QUALITY response (which I am willing to submit).
Typically there is an area wherein I can, for lack of a better term, Tip the responder. If I failed to do so please advise.
I recognize your type of diligence can be beneficial in the future regarding other questions I may have. If exchanging contact information is possible (permissible) please let me know.
Yes, you are correct; it was the other Mike I was referring to. That having been said, your response was not without merrit.