Brazing Copper To Steel Hvac

What is the proper solder brazing rod and flux to use when making this connection.

Brazing copper to steel hvac. Lap joints work best with an annealed copper brazed joint. My paperback and e book. The most common rods used for typical hvac brazing are 0 5 and 15 with several other levels mixed in there. I hear standard 15 silverphos is not a good choice.

I also give some tips on how to braze a copper fitting and ref. Both oxygen free and oxygen bearing copper can be used for brazing work. We will be brazing or silver soldering refrigerant a c lines for hvac equipment. Hot tips for copper brazing.

Brazing rods look like straightened metal coat hangers and like solder they become stronger as the percentage of silver they contain increases. In this video i go over the oxy acetylene torch tips i use along with the gas pressures i use. Step by step tutorial on how to braze copper pipe like a pro. The braze is what is melted by the torch to join two metals.

One of my friends owns a motel and asked me to replace the compressor in his pepsi machine for him. The brazing temperatures for most of the brazing alloys used to joint copper piping systems bcup and bag alloys see below are roughly between 1 150 f 621 c and 1 550 f 843 c. The percentage is the percentage of silver content in the rod. The most commonly used brazing filler metal types used to join copper tube and fittings fall into two distinct categories.

I see the discharge line is steel brazed or soldered to the copper compressor discharge fitting. I m a residential hvac guy. For joining copper lines we usually use brazing rods that are made out of a copper phosphorous combination.