Reducing Carbon During Brazing

Yeah I've had that problem before.Tell me what are you using? Oxy-Acetylene?What type of steel?I know you said Stainless fittings,is the other cast iron?or a high carbon steel? Skipper

Are you trying to braze to quickly with very hot flame? if so you are probably overheating your joint. I assume you are silver brazing not bronze?which requires a much higher temperature.

45% silver solder is best for a low temperature but there will all ways be some discoloration,use a neutral flame to keep carbon deposits to aminimum and or use propane it is much cleaner.

You might consider flowing argon through the manifold and pipes during brazing to displace the air. That should eliminate the need for post-braze clean-up.

Go to this website:

http://www.lucas-milhaupt.com/htmdocs/brazing_support/everything_about_brazing/what_brazing_about.html

This is a good start. These people provide excellent support. If you don't see what you need here, call them. Excellent service.

And I do not own stock in the company...

If all else fails two possibilities,

TIG (GTAW) or use a Hydrogen Oxygen torch system (spendy but might have cheaper total cost).

Brad