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  1. #1
    Join Date
    Apr 2004
    Location
    Madison, WI
    Posts
    223

    Default brazing aluminum to steel?

    Well, for a science project, my friend and I are making a solar powered car out of ungalvanized sheet metal and aluminum, but a problem arose to me just now. Can we braze our aluminum axles to our steel body? If yes, what should we use, and how should we go about doing it? Thanks for the help.
    -Tanner

  2. #2
    Join Date
    Apr 2004
    Location
    Moneta, VA
    Posts
    108

    Default

    Tanner,

    I do know that both Allstate and J.W. Harris both make brazing and soldering alloys for that purpose. I can't remember the number to them though. Your local welding supplier should be able to get them for you.

    Good Luck!

    Done a little research, J.W. Harris Al-Solder 500, Allstate 509 Strongset, Allstate 107 will work for you. You can check their websites ESAB for Allstate, and J.W. Harris . Hope this helps!
    Chris

  3. #3
    Join Date
    Mar 2007
    Posts
    265

    Default

    I doubt that any of the soldering products will have the strength that you are looking for. The aluminum trailer manufacturers that I deal with use a bonded sheet product that they outsource. It comes in sheets and has 1/4" aluminum bonded to 1/4" carbon steel. That way you can weld aluminum attachments to the aluminum side and steel attachments to the steel side. It is available in thicker sheets also. The bonding process is proprietary and , to my knowledge, you must buy the product in sheets.

    If you can find a manufacturer of aluminum trailers or truck bodies in your area, they will probably sell you smaller pieces of this material, or if you tell them what it is for, maybe they will give you some scrap pieces that will work.

  4. #4
    Join Date
    Apr 2004
    Location
    Madison, WI
    Posts
    223

    Default

    Well, I went on these leads and couldn't find anything that would be in my pricerange/work. I did come up with an easier way, hotglue!
    -Tanner

  5. #5
    Join Date
    Sep 2005
    Location
    Evansville, IN
    Posts
    2,348

    Default

    Tanner:
    Superglue and duck tape? I've done a similar type of connection. We used two plates of similar size and bolted the two together and welded the appropriate sides to the appropriate material.
    Good luck,

  6. #6
    Join Date
    Nov 2003
    Posts
    3,212

    Default

    Tanner
    as a practical matter " you can't get there from here " ....
    mechanical fastening such as plates and bolts or huck rivets may work in your application.... epoxies and composite reinforcement are also an option... but welding or brazing the light metals to ferrous metals is out of the question by conventional means... and yes there are papers published from AWS and Sandia National Labs on friction welding methods... but the physics of it are not practical for most applications... and even with the equipment.. the torsional loads and lack of fatigue strength will probably defeat you... methinks that this is one application where welding or brazing is not the best avenue for your application...
    just one mans opinion
    Heiti
    .

    *******************************************
    The more you know, The better you know, How little you know......

    “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

    Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

    My Blue Stuff:
    Dynasty 350DX Tigrunner
    Dynasty 200DX
    Millermatic 350P w/25ft Alumapro & 30A
    Millermatic 200

    TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam..

  7. #7
    Join Date
    Nov 2003
    Posts
    3,212

    Default

    Aint sayin that it cannot be done... just telling you that there may be a better way to approach it for your application.....klsm54 mentioned some plate that was probably explosively bonded... much the same as our coinage is now (look at your dimes and quarters.. they are an explosively bonded sandwich).....why get so exotic when there are easier ways.... just maybe there is a better way to join your axles to chassis... that is easy to find in the hardware store... that is inexpensive and will withstand the stresses involved....
    hope this helps
    Heiti
    .

    *******************************************
    The more you know, The better you know, How little you know......

    “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

    Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

    My Blue Stuff:
    Dynasty 350DX Tigrunner
    Dynasty 200DX
    Millermatic 350P w/25ft Alumapro & 30A
    Millermatic 200

    TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam..

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