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Thread: need help for brazing HVAC lines
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25-01-2015, 07:29 AM #1
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need help for brazing HVAC lines
What is the best roll of silver brazing or rods that will flow using mapp gas?
Last edited by hammerdean; 25-01-2015 at 09:47 AM.
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25-01-2015, 10:49 AM #2
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Re: need help for brazing HVAC lines
For copper to copper i'd use 5%, for copper plated steel, txv's and service valves 15% and for dissimilar metals like brass and steel you'll need a rod with a silver content about 40% and a suitable flux. Make sure your torch has a high enough capacity to cope with the line size you are working on, prolonged heating will cause poor brazed joints, i think the silver boils off when heated too long making porous joints.
Mostly found in Oxfordshire, UK :)
