Brazing Sheet Metal

Two pieces of steel sheet are to be brazed.

Brazing sheet metal.

The steel must first be cleaned so that grease and dirt is removed. Mix a small amount of flux with water to form a paste. The intense heat of welding will likely burn through or at least warp the thin section. A borax flux powder is mixed with water to produce a paste which is brushed along the joint.

The steel must first be cleaned so that grease and dirt is removed. Use the right brazing rod material for the metal used in your project. Wire wool or emery cloth are the most suitable abrasives. Likewise a complicated assembly requiring sequential brazing operations shall be brazed using a high melting braze alloy for the initial braze and progressively lower melting alloys for subsequent brazes.

Two pieces of steel sheet are to be brazed. Brazing requires less energy than welding and can be used to join dissimilar metals. Brazing is similar to soldering but at higher temperatures. Therefore during the brazing process you should take care to maintain a clearance between the base metals to allow capillary action to work most effectively.

Wipe the areas on the metal pieces that will be joined with the emery cloth so the surfaces are free from dust and grease. Wire wool or emery cloth are the most suitable abrasives. Apply this paste to the areas on the metal pieces that will be joined using the brush. Sheet metal bonded to 0 5 in.

Brazing as we ve seen uses the principle of capillary action to distribute the molten filler metal between the surfaces of the base metals. For instance brazing is the better option on a t joint with 0 005 in. Welding after brazing may remelt the braze or cause liquid metal cracking of the sheet metal.