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Old 03-05-2011, 03:48 PM   #1
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Brazing Technique


Using 15% silver brazing rod. Do I still need to use flux and clean the copper surface with sand cloth ?

For my understand I need use flux and sand cloth with soldering not brazing.

I'm asking this because I'm seeing both ways in the Youtube.
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Old 03-05-2011, 05:04 PM   #2
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Brazing Technique


I use flux, or sand if the pipe is visibly dirty or oily.
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Old 03-05-2011, 05:04 PM   #3
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Brazing Technique


for stay silv 15, no flux is required for copper to copper brazing. i think that anything at about 15% silver or under, no flux is required. the higher silver, lower temperature rods require a white brazing flux.
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Old 03-05-2011, 05:50 PM   #4
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Brazing Technique


No flux is needed. You don't have to clean the pipe but unless it's real dirty. Don't forget to purge with nitrogen.
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Old 03-06-2011, 02:37 AM   #5
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Brazing Technique


Haha guys actually use sand cloth and flux with oxy-ace
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Old 03-06-2011, 07:59 AM   #6
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Brazing Technique


Ayuh,... If you sand, 'n flux,...
You'll be making fewer repairs later....
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Old 03-06-2011, 08:26 AM   #7
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Brazing Technique


No need for flux when using sil/phos rods, the phos is the flux. Joints still need to be clean.
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Old 03-06-2011, 04:05 PM   #8
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Brazing Technique


If you use the high silver content stuff you can braise a joint in the mud
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Old 03-06-2011, 04:26 PM   #9
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Brazing Technique


Quote:
Originally Posted by unicursalhex View Post
If you use the high silver content stuff you can braise a joint in the mud
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Old 03-07-2011, 06:15 PM   #10
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Brazing Technique


Quote:
Originally Posted by unicursalhex View Post
If you use the high silver content stuff you can braise a joint in the mud
15% silver phos is used because it make a strong joint. But you still have to sand the copper.
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Old 03-07-2011, 06:20 PM   #11
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Brazing Technique


You guys!!!

There is phophurous is the braze rod. That will burn thru metal. Adding flux just adds mor contaiminants to the system.

If you are going from copper to steel you should use 45% silver, but 15% and stay silv flux will do it up.
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