[Jewelry making - Article 01141] - Re: [Orchid] Using aluminum in jewelry

[Kay Davis]

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    Good morning (EST) 

    I hate to differ, but it is possible to torch join Aluminum. Just it
    is usually referred to has Aluminum brazing. Depending on the alloy
    rod that is used it is either true brazing or welding. Technically
    Brazing is joining metal with a filler metal that has a lower melting
    point than the metal to be joined but above a certain temperature
    (Below that temperature it is referred to has soldering) While
    Welding is melting the metal to be joined and adding filler metal to
    the joint. In my experience with Aluminum Brazing rods and a
    Oxy-acetylene torch the Aluminum often melts and mixes with the
    brazing rod so technically I am welding Aluminum I believe. Most
    Aluminum Brazing rods are made of a silicon-aluminum Alloy which has
    a lower melting point than pure Aluminum. 

    A quick Google search for "Aluminum Brazing" 

    Yields much information. I personally have used rods made by a local
    company called Soldel, however your welding gas distributor should
    be able to provide you with an equivalent rod. 

    In checking the Google link I came across an excellent on-line (and
    free) technical reference to the Brazing process at: 

    http://www.handyharmancanada.com/TheBrazingBook/bbook.htm 

    In looking at their rather excellent site I see they also have a
    reference for precious metal brazing (Soldering) at:

    http://www.handyharmancanada.com/hbpm/hbpm.htm 

    These are great references from what I can see. 

Kay

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