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Thread: Alumalloy

  1. #11
    Join Date
    Dec 2005
    Location
    wisconsin
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    836

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    Quote Originally Posted by dseman View Post
    If the filler melts below 840F, and joins metal through bonding by capillary action, then it is soldering. If it melted above 840F, but below the melting point of the object being joined, then it would be called brazing. This stuff is solder.
    I would not even call it that good! Its just zinc based "pot" metal. Real brazing and soldering materials are aluminum/silicon based, with some of the real solf solders having lead and tin as well. This stuff has no ductility, and in fact can cause the base metal to become brittle depending on the alloy.
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  2. #12
    Join Date
    Nov 2008
    Location
    Atl, Ga
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    371

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    Zinc is brittle, Zinc also oxidizes easily (Think about it - what are sacrificial anodes made from?). Brittleness and corrosion susceptibility aren't desirable in any repair. It's a cruel joke on the consumer when they market this stuff as acceptable for repairing small aluminum boats.

    If a piece is impossible to fix by welding or "real" brazing, I'd resort to epoxy before using that stuff.

  3. #13
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    Dec 2005
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    wisconsin
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    Quote Originally Posted by MR.57 View Post
    Zinc is brittle, Zinc also oxidizes easily (Think about it - what are sacrificial anodes made from?). Brittleness and corrosion susceptibility aren't desirable in any repair. It's a cruel joke on the consumer when they market this stuff as acceptable for repairing small aluminum boats.

    If a piece is impossible to fix by welding or "real" brazing, I'd resort to epoxy before using that stuff.
    Actually we are going away from zinc, some of our anodes are aluminum alloy, some are now magnesium.
    "Better Metalworking Through Research"

    Miller Dynasty 300DX
    Miller Dynasty 200DX
    Miller Spectrum 375 extreme
    Miller Millermatic Passport

    Miller Spot Welder
    Motor-Guard stud welder

    Smith, Meco, Oxweld , Cronatron, Harris, Victor, National, Prest-o-weld, Prest-o-lite, Marquette, Century Aircraft, Craftsman, Goss, Uniweld, Purox, Linde, Eutectic, and Dillon welding torches from 1909 to Present. (58 total)

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