Brazing Technique

03-05-2011, 04:48 PM	#1
JJboy Member     Join Date: Oct 2010 Location: Austin - Texas Posts: 1,402	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. __________________ **Always kill the power ** Hot air rises, but heat will always move from higher to lower temperatures. ** Real man shoot in manual. ** If it ain't grounded, it ain't dead.

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03-05-2011, 06:04 PM	#2
3 legged dog MXer     Join Date: Dec 2009 Location: South West Coast Posts: 128	Brazing Technique I use flux, or sand if the pipe is visibly dirty or oily.

03-05-2011, 06:04 PM	#3
NitroNate Member   Join Date: May 2010 Location: San Antonio Posts: 348	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.

03-05-2011, 06:50 PM	#4
Hubcap626 Member   Join Date: Feb 2011 Posts: 94	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.

03-06-2011, 03:37 AM	#5
unicursalhex HVAC Supermodel     Join Date: Jan 2011 Location: Wa Posts: 167	Brazing Technique Haha guys actually use sand cloth and flux with oxy-ace __________________ Mark it zero!

03-06-2011, 08:59 AM	#6
Bondo Master General ReEngineer     Join Date: Dec 2007 Location: Chaumont River, Ny. Posts: 3,169	Brazing Technique Ayuh,... If you sand, 'n flux,... You'll be making fewer repairs later....

03-06-2011, 09:26 AM	#7
Marty S. Member   Join Date: Oct 2009 Location: Nebraska Posts: 2,298	Brazing Technique No need for flux when using sil/phos rods, the phos is the flux. Joints still need to be clean.

03-06-2011, 05:05 PM	#8
unicursalhex HVAC Supermodel     Join Date: Jan 2011 Location: Wa Posts: 167	Brazing Technique If you use the high silver content stuff you can braise a joint in the mud __________________ Mark it zero!

03-06-2011, 05:26 PM	#9
JJboy Member     Join Date: Oct 2010 Location: Austin - Texas Posts: 1,402	Brazing Technique Quote: Originally Posted by unicursalhex If you use the high silver content stuff you can braise a joint in the mud __________________ **Always kill the power ** Hot air rises, but heat will always move from higher to lower temperatures. ** Real man shoot in manual. ** If it ain't grounded, it ain't dead.

03-07-2011, 07:15 PM	#10
hvaclover Member     Join Date: Oct 2008 Location: Suburbs of Detroit Mi Posts: 3,702	Brazing Technique Quote: Originally Posted by unicursalhex 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. __________________ Just slow, not stupid.

03-07-2011, 07:20 PM	#11
hvaclover Member     Join Date: Oct 2008 Location: Suburbs of Detroit Mi Posts: 3,702	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. __________________ Just slow, not stupid.