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Thread: Best Grade of Aluminum to get polished mirror finish

  1. #1
    Associate Engineer
    Join Date
    Jan 2013
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    2

    Best Grade of Aluminum to get polished mirror finish

    Needing to make some decorative badges from AL. Thickness if 0.5mm. Typically I use Stainless Steel and polish the top to a Mirror Finish (Ra= 0.4 or better).

    What grade of AL would you suggest to get a mirror type polish finish?

  2. #2
    Technical Fellow
    Join Date
    Feb 2011
    Posts
    1,043
    Welcome, the harder grades are better 6061/6063 but aluminum is soft and it will scratch really easy. I mean microscopic dust trapped in the skin of your finger will leave a smooshed (technical term ) scratch. The only way around that is to have them clear anodized after polishing.

  3. #3
    Administrator Kelly Bramble's Avatar
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    Feb 2011
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    Bold Springs, GA
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