How To Braze Metal with a Torch

Brazing is the process of joining two independent pieces of metal to form one strong load-bearing joint.

• Brazing is similar to soldering, but at higher temperatures.
• Use the right brazing rod material for the metal used in your project.
• The brazing rod should be melted by the heat of the metal pieces being joined, not by direct contact with the flame of the torch.
• Use a torch that produces a high intensity flame.

Recommended Rods by Metal Type

Copper, brass, bronze:
Copper Phosphorous Brazing & Welding Rods

Steel, stainless steel, nickel alloys, copper alloys, cast iron, tungsten carbide:
Nickel Silver Brazing & Welding Rods

Cast iron, galvanized, nickel, steel, malleable iron:
Bronze Brazing & Welding Rods

Aluminum:
Bernzomatic AL3 Aluminum Brazing & Welding Rods

Directions

1. Use the wire brush or emery cloth to scuff the surface of the metal. Then clean the surfaces using soapy water or a degreaser.
2. Position the metal as desired. In most cases, an overlapped joint will be stronger and braze together easier than a gapped joint. If needed, use clamps to secure the pieces in position.
3. Heat the joint where the two pieces of metal will meet until the joint glows.
4. Apply the brazing rod to the joint while continuing to heat the metal surfaces. For large areas, heat portions of the joint to temperature and then move to the next adjacent area.
5. After brazing, use a wire brush to clean the brazed surface to remove any oxidation or residue.

Tips

• Read our General Safety Precautions before starting your project.
• Read the instructions that come with your torch and braze before beginning your project.
• Always remove torch from fuel cylinder and store fuel in an upright position after completing your project.