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fuel tank aluminum 5052-32 or 5052-321?

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  • fuel tank aluminum 5052-32 or 5052-321?

    I am pondering what aluminum alloy to use on my fuel tanks . The bearhawk book says .050 5052-32 or other weldable alloys. I can get .050 5052-321 at a much better price than the -32, so is there anyone out there that can advise which alloy is superior and why? Thanks gary
    S

  • #2
    Here is what little I know. The alloy is the same, 5052. The 32 and 321 refer to the heat treat of the alloy. The higher the number the harder the material. It is usually written 5052 H32. My bet is that the 321 is some variation on H32. Bottom line, I would use what you can get. I would confirm this with the metal supplier.

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    • #3
      In searching, I found a bit that said the H321 was strain hardened and the H32 hardening process was more controlled. Shouldn't be significant difference for our purposes.

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      • #4
        I found that more controlled tempering post somewhere since also. I didnt think it was a significant issue for our purpose either but thought id see if someone else may know better thanks

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