HVAC School is the ever growing online source for real training topics for technicians in the Air-conditioning, Heating and Ventilation Fields. In the podcast, we will share recorded training, tech ride alongs, share challenging diagnostic scenarios. All to help make the industry, your company, and … read more
In this short podcast episode, Bryan covers the unique practices of brazing steel. He also explains how it differs from brazing copper.
Brazing steel appears to be a rather uncommon practice in the HVAC industry. However, we actually do braze steel when we braze in compressors. Many compressors have copper-plated steel stubs; only the outer coating is copper, and if you burn through it, you'll reach the steel. However, steel requires a different fluxing agent than copper-to-copper or copper-to-brass brazing; you can't use a 15% silver-phosphorus rod because phosphorus doesn't react well with steel.
Instead, you will need a high-silver rod WITHOUT phosphorus when brazing steel to steel, copper, or brass. We recommend using a separate fluxing agent or flux-coated rods. However, high-silver rods are expensive and REQUIRE flux. When working with a compressor with copper-plated steel stubs, try to get all the solder off with heat.
When working with steel, you must keep in mind that it has a higher melting temperature and lower thermal conductivity. In other words, you can apply more heat to steel without it melting, but the heat doesn't transfer to steel as easily as it does to copper. You'll want to move your torch around more and pay more attention to the tip you use. Even though the thermal properties differ from copper, you're still aiming to get the steel to a dark cherry red color, about 1200 degrees Fahrenheit.
Remember, you also want to protect any other components that will come into contact with the heat. You can use a wet rag or Refrigeration Technologies WetRag, which works great as a heat-blocking putty.
Learn more about Refrigeration Technologies HERE.
If you have an iPhone, subscribe to the podcast HERE, and if you have an Android phone, subscribe HERE.
Educational
Interesting
Funny
Agree
Love
Wow
Are you the creator of this podcast?
and pick the featured episodes for your show.
Connect with listeners
Podcasters use the RadioPublic listener relationship platform to build lasting connections with fans
Yes, let's begin connectingFind new listeners
Understand your audience
Engage your fanbase
Make money