How To Braze Sheet Metal With Silver Solder

With a propane torch heat the area slowly testing with the solder often times you can see the heated steel flash over when the time is right regardless when the solder will stick you re ready.

How to braze sheet metal with silver solder.

If it starts to melt then the metal is hot enough if it doesn t add some more heat to the area. In silver soldering it is important to work with clean metal pieces. If you do add heat to the area whist trying to add solder to the joint then the solder will most likely melt before it touches the joint. It is melted instantly by the heat in the base metals and drawn by capillary action completely through the joint.

Place the solder on the joint. For large areas heat portions of the joint to temperature and then move to the next adjacent area. So if for example you want to join two pieces of thin sheet metal together you would need to overlap them. Apply a dab of flux and while keeping the heat up solder a nice bead over the area.

Cutting the solder and soldering. The silver solder will be drawn through the joint filling the minute crack between the two pieces of metal bonding with the surfaces to join them. The joints must be. Apply the brazing rod to the joint while continuing to heat the metal surfaces.

Rub the silver solder onto the heated joint. Heat the joint where the two pieces of metal will meet until the joint glows. To cut the silver solder use metal snips. The filler metal is then brought into contact with the heated parts.

If needed use clamps to secure the pieces in position. Once the metal pieces are cleaned there is one last step that must be done before they are ready to be. In a brazing operation you apply heat broadly to the base metals. This is how a brazed joint is made.

Brazing is a metal joining process in which two or more metal items are joined together by melting and flowing a material into the joint the filler material having a lower melting point than the adjoining metal. The difference between brazing and soldering is the temperature necessary to melt that filler metal. Once it has been cut apply a coating of flux to the silver solder. Stick it to the side of the joint.

Notice the smooth finish without grinding. Step 8 turn off the oxy acetylene torch pick up the silver soldered metals with the lineman s pliers and drop the joined metals into the water filled bucket. Silver soldering does not close gaps so the two metal pieces to be joined must have as little space between them as possible to make a clean joint.