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Thread: what kind of alumunim do i have ? ?

  1. #1
    Join Date
    Dec 2007
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    Default what kind of alumunim do i have ? ?

    i have a half dozen medical home care oxygen tanks that are alum in color with green top section. . . for obvious reasons. they are scrap so i have attempted to cut them into smaller pieces so they will fit in my crucible for melting. they are about 4 inches in diameter with approx. 1/4" wall thickness.
    very forgiving when i try to flatten the rings i have cut. . . and they don't break or even crack when squeezed down in 180 degrees tight bend. . .

    what grade would any of you knowledgable guys think this stuff may be ?

  2. #2
    Join Date
    Apr 2005
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    Tucson AZ
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    Default

    Since it is not a cast alloy you are wasting your time melting it, If you want to make castings, start with castings. They would normally be 6061 but there are some out there of 6351.
    Last edited by tdmidget; 05-24-2012 at 06:26 PM.

  3. #3
    Join Date
    Aug 2011
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    Buffalo
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    Talking Cue The Banjos!!!

    Medical-grade Aerospace Billet, of course.

    I'm surprised you even have to ask.
    "The Administration does not support blowing up planets." --- Finally some SENSIBLE policy from the Gov!

  4. #4
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    Ever see that youtube on how they make scuba tanks? Amazing!
    "The things that will destroy America are prosperity at any price, peace at any price, safety first instead of duty first, the love of soft living and the get rich theory of life." Theodore Roosevelt

  5. #5
    Join Date
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    Quote Originally Posted by flylo
    Ever see that youtube on how they make scuba tanks? Amazing!
    Please post the link.

    JL.........................

  6. #6
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    Default

    dang, i thought i reallly had something here. well, you suppose they would work for crafty kind of castings ? like "lost foam" stuff ? ;gheeze, ive got a lot of cutting time into them, hate to see that all go to waste .

  7. #7
    Join Date
    Dec 2008
    Location
    Luton,UK
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    Default

    People often have trouble with machining castings made from extruded alloys.

    The usual trick is to add a little copper.

    Search the casting forums for details.

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