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  1. #1
    Join Date
    Oct 2003
    Posts
    292

    Brazing Copper To Brass

    I have been an A/C teck for over 30 years now but I have always had trouble brazing these tow metals properly. Mostly carrier evaporator coils with worn out compression fittings, i want to back off the nuts and just braze around the copper and brass fitting. Anyone have any good ideas on type of solder and flux?

  2. #2
    Join Date
    Oct 2003
    Posts
    292

    brazing copper to brass

    I want to think all of you that posted how to solder these two alloys and it worked just great, you can always teach a tech somting new if he loves his kind of work. Even after 32 years I still have a passion for this buisness and Ive tried other fields but this is the best keeps your mind working, so thanks again for all your great Info.

  3. #3
    Join Date
    Jun 2003
    Location
    Florida
    Posts
    9,548
    Did you try the blue rod....(505 I think....)????
    If everything was always done "by the book"....the book would never change.

  4. #4
    Join Date
    Apr 2007
    Posts
    6,285
    silver....clean...clean...clean....

  5. #5
    Join Date
    Oct 2004
    Posts
    100
    I do not have the answer to you soldering question. I have the same problems you do. I have used a brazing rod with limited success, on steel to copper.

  6. #6
    Join Date
    Apr 2007
    Posts
    6,285
    Quote Originally Posted by vet View Post
    I want to think all of you that posted how to solder these two alloys and it worked just great, you can always teach a tech somting new if he loves his kind of work. Even after 32 years I still have a passion for this buisness and Ive tried other fields but this is the best keeps your mind working, so thanks again for all your great Info.
    ???It worked and no one gave you any answers?? was this a trick question?

  7. #7
    Join Date
    Oct 2003
    Posts
    292

    brazing

    I posted this the other day, sorry but I got back into the wrong form i think. 45% silver with white paste flux, but I had to use the brazing tanks the propane tank just was'nt enough. Ive never done it before except with a brazing rod which was a disaster so thanks again. Boy that silver solder was 45.00 for only about 10 ft. So the other tech looking to solder brass to copper it works great.

  8. #8
    Join Date
    Apr 2007
    Posts
    6,285
    Quote Originally Posted by vet View Post
    I posted this the other day, sorry but I got back into the wrong form i think. 45% silver with white paste flux, but I had to use the brazing tanks the propane tank just was'nt enough. Ive never done it before except with a brazing rod which was a disaster so thanks again. Boy that silver solder was 45.00 for only about 10 ft. So the other tech looking to solder brass to copper it works great.
    use nitro and the brazing isnt a n issue..(as much)

  9. #9
    Join Date
    Jun 2006
    Location
    Las Vegas,NV
    Posts
    115
    just read this silver solder with paste is the only way and also it has too be clean connections

  10. #10
    Join Date
    Jun 2000
    Location
    WYO
    Posts
    2,019
    95/5 with flux.
    never say never

  11. #11
    Join Date
    Oct 2003
    Posts
    292

    Smile brazing with 45/5 & white paste flux

    I hav'nt tried the 95/5 is it less costly since the silver with flux worked so well, and yes you are right clean,clean,clean! It was really easier than brazing I could'nt believe the results,so thank you all very much.

  12. #12
    Join Date
    Apr 2007
    Posts
    6,285
    strength of the joint

  13. #13
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,914
    Silphos brazing alloy is ONLY for copper to copper connections.

    For brass to copper or steel to copper you need the high silver content solder with flux. I haven't tried any of them, but there are other products on the market reputed to be up to the job.
    If more government is the answer, then it's a really stupid question.

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