How To Braze Weld Sheet Metal

Apply this paste to the areas on the metal pieces that will be joined using the brush.

How to braze weld sheet metal.

This restraint creates high residual tensile stress that causes the weld to act like a stretched rubber band with the workpiece holding the ends figure 1 for this reason when the clamps that hold the workpiece are removed the base metal is allowed to move or spring. Glow the joint where two metal sections. To get a good weld the surface of the metal you re using has to be free from substances such as oxides grease and oil. How to braze metal apply emery cloth or wire brush to scrape the metal surface.

Use a degreasing solution first from a local hardware store to remove the grease and oil first. Rust and scale can be removed by pickling soaking the metal in a compatible strong acid such as hydrochloric acid. It s just heating the metal then touching the metal with the brazing rod to see if the rod starts melting everything together. Then clean the surfaces using a degreaser or soapy water.

Wipe the areas on the metal pieces that will be joined with the emery cloth so the surfaces are free from dust and grease. The weld wants to shrink as it cools to room temperature but is restrained from doing so by the adjacent cold base metal. 6 4 oxyacetylene braze welding. Heat the joint where the two pieces of metal will meet.

There are many materials that can be used to make the filler metal. In most cases an overlapped joint will be stronger and braze together easier than a. Brazing is a similar method to soldering and welding and requires the metal to be melted so they can be joined. In this example i m making some candlesticks welding copper to aluminum.

Mix a small amount of flux with water to form a paste. Typically an overlapped joint will be sturdier and braze together simpler than a. Now position the metal properly. 6 4 1 the oxyacetylene torch is the heat source most commonly used for brazing.

A neutral to slightly oxidizing flame is employed in conjunction with a filler rod of 60 cu 40 zn alloy rbcuzn a as specified in aws a 5 8 to braze galvanized steel. Melt brazing making candle sticks my first weld type i will describe here is typical melt brazing. Another method used to join pieces of metal together is brazing. Position the metal as desired.

Steps use the wire brush or emery cloth to scuff the surface of the metal.