How to Use Silver Solder


Silver solder is used to join brass, copper, tin and other materials by hard soldering, also known as silver soldering. The main ingredient in silver solder is not silver -- only 2.5 percent of silver solder is actually silver -- but tin. It is the silver that provides the solder its excellent free-flowing quality and makes it such a good sealant. Silver solder is not an acceptable technique for gap-filling, however. For silver soldering to work well, the pieces must already fit snugly.

Things You'll Need

  • Soldering unit
  • Silver solder rod
  • Fittings
  • Fibre-glass brush
  • Flux paste
  • Wet rag
  • Dry-fit the pieces you plan to solder. Check that they fit snugly with each other before you start soldering. Remove any burrs from the end of the pieces. This is especially important if you are soldering the pipes of a refrigeration system, because burrs can disrupt the flow of the refrigerants and become noisy and inefficient.

  • Clean the inside of both pieces and your soldering tool's iron tip with a fibreglass filament brush. The silver solder will not take if the parts are not completely free from contamination.

  • Coat each fitting with paste flux. This will help keep them clean. Fit the pieces together. Start heating the joint and the surrounding area with the soldering flame. Move the flame evenly around the joint until the inner flame touching the fittings turns green. This will signal that you are ready to apply the silver soldering.

  • Apply the silver solder rod to the joint while you continue to concentrate the flame on the center of the fittings. You should see the silver solder spread easily around the joint. If it doesn't, it means the fittings were not hot enough. Apply the flame on the fittings until the silver solder covers the entire joint.

  • Wrap the joint with a cold rag. This will cool down the joint quickly and give you a shiny and professional-looking finish.

Related Searches


  • Photo Credit Comstock/Comstock/Getty Images
Promoted By Zergnet



You May Also Like

  • How to Solder Silver

  • How to Make Silver Soldering Flux

    Metal workers, artists and crafters all rely on flux to complete many of their projects. Flux is a substance that comes in...

  • How to Silver Solder Metal

    Silver soldering, also known as hard soldering or silver brazing, uses a silver-based solder to join two or more pieces of dissimilar...

  • How to Use Silver Solder Paste with Flux

    Soldering involves the heating of a filler metal to serve as a binder between two other metal pieces. While most solders are...

  • How to Solder an AC Condenser

    Silver soldering the copper lines to an air conditioner's condenser unit is not rocket science, but it does require attention to detail....

  • What Is a Soldered Silver Bowl?

    A number of antique silver bowls and other pieces may have the words "soldered silver" stamped somewhere on the item. The term...

  • Types of Silver Solder

    Making silver jewelry often involves soldering one or many pieces of metal together to form shapes and create intricate patterns and details....

  • Silver Solder Techniques

    Silver soldering, or hard soldering, as it is sometimes called, is the most durable soldering type and has the most number of...

  • HVAC Silver Solder Procedures

    Silver soldering, as opposed to soft soldering, uses a silver alloy of 20 to 40 percent silver. Since it melts at higher...

Related Searches

Check It Out

DIY Wood Transfer Christmas Ornaments

Is DIY in your DNA? Become part of our maker community.
Submit Your Work!