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School me on Brazing!

Discussion in 'Exploring everything under the sun!!' started by briwayjones, July 13, 2009.

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  1. briwayjones

    briwayjones Manual Master

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    I would like to build a custom computer case. I don't have a welder or really no anything about welding. If I'm not mistaken you can braze with just a propane torch though? So I was thinking of brazing it, thinking there might not be too step of a learning curve and since if I'm not mistaken you don't need a whole lot of equipment like you do with welding. I don't really know anything about brazing either though. I assume there is different kinds of braze material? What kind would I need? Basic techniques? ect. I'm thinking the metal I'm going to use is metal from regular old steel computer cases.
     
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  3. SoBeLover

    SoBeLover Explorer Babe Moderator Moderator

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    I talked to my friend who runs a brazing company and told him what you were doing. He recommends that you put the computer case together using a soldering iron and solder, since the heating point of solder is much less than traditional brazing techniques. In order to braze steel together, you need a temperature of around 2250 degrees and the only way that could be done is in a furnace, since a torch will not get that hot.

    I hope this helps you. Good luck and post some pics when you get it finished
     
  4. briwayjones

    briwayjones Manual Master

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    Solder would be strong enough to hold it together? I kind of don't think so? At least not for what i'm going to do with the case. One side of the case would have to support picking up the weight of the whole computer which will include a LCD monitor. A propane torch will get up to 3600 degrees. And to my knowledge (I thought anyway, may be wrong) brazing with a propane torch is a common practice?
     
  5. kert0307

    kert0307 Well-Known Member

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    By propane torch, do you mean one of those blue bottle types with the torch attached to it, or a torch that has two bottles, one for oxygen and one for propane with hoses going from the bottles to the torch? Big difference in heat output...
     
  6. Maniak

    Maniak Moderator-Stock 91-94 Staff Member Moderator Elite Explorer

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    I don't know if it helps, but we've used coat hangers to braze/solder/weld (not sure what you would call it) a truck box backtogether.. I'm pretty sure it was map gas that we were using and not the oxy/aceteline(sp?) torch.

    ~Mark
     
  7. briwayjones

    briwayjones Manual Master

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    One of the handheld blue bottles with a torch attached to it. And the 3600 degrees that I saw was for that type of torch, that's what it seemed like anyway. Maybe I got a bit of mis-information? Now that I think about it that does sound high.
     
  8. IZwack

    IZwack Moderator Emeritus

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  9. rgcme33

    rgcme33 New Member

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    No complex dual gas setup required... You need a MAPP torch. Sears has them, less than 30$ IIRC. Harbor freight also has them. You get the MAPP gas from a welding supply store.
    You will also need brown tipped 15% solder rods, also available at welding supply store, or any pre-fluxed rod for brazing aluminum.

    You may find information specifying a MAPP/Oxygen torch is required, but for your application MAPP alone will be sufficient.

    Spend some time googling and practicing and Im sure your project will come out great.
     
  10. briwayjones

    briwayjones Manual Master

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    Even though it's not aluminum I'll be brazing?
     
  11. briwayjones

    briwayjones Manual Master

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    Do you have a link, I can't find anything on Sears or Harbor Freight. Is it like a propane torch. A torch head that you screw on to a MAPP gas bottle?
     
  12. Lacky01

    Lacky01 Active Member

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    do you have access to an oxy/acetylene torch? i've brazed with great results on that, but I only brazed thin steel.

    def. time for a heavy Google-ing!!! the informations out there
     
  13. FROADER

    FROADER Moderator Staff Member Moderator Elite Explorer

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    Yes it's like that but yellow, instead of blue. Home Depot (where I got mine) or Lowes will have it as well.

    [​IMG]
     
  14. briwayjones

    briwayjones Manual Master

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    thanks
     
  15. gijoecam

    gijoecam Village Idiot Elite Explorer

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    For brazing thin metals like that, you're gonna need a MUCH finer tip that what comes on those torches... Otherwise you're going to put a TON of extra heat into it trying to get it to melt... it's gonna heat-warp like crazy, and you're not gonna be happy.

    You need a MAPP gas or O/A torch with a pencil tip. Can it be done? Sure. Is it gonna be easy? Nope.

    Personally, if you want it to look nice, I'd think about taking it to a welding shop. Those guys can do that stuff in their sleep all day long, and a good welder will make it look like art. They may even have some other ideas that'll make it better or stronger. It's probably not too expensive either....

    -Joe
     
  16. briwayjones

    briwayjones Manual Master

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    Hmm, I might have to go with riveting.
     
  17. sn0border88

    sn0border88 Master Apprentice Elite Explorer

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    Not true, brazing happens below 650 if I remember correctly and steel is easily brazed or braze welded with an O/A torch.

    But it sounds like for what you want to do, it would be easier and look nicer if you rivet it.
     

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