Brazing Sheet Metal

Brazing and braze welding.

Brazing sheet metal.

Brazing filler metal may be pre placed at the joint in the forms of rings washers strips slugs or powder or it may be fed from hand held filler metal in wire or rod form. Brazing is a metal joining process in which two or more metal items are joined together by melting and flowing a filler metal into the joint with the filler metal having a lower melting point than the adjoining metal. American welding society aws. Cladding an aluminum silicon alloy with a brazing sheet provides an aluminum alloy that has the thin walls necessary for use in automobile heat exchangers as well as such desirable characteristics as high strength corrosion resistance and formability.

Brazing is a quick and inexpensive alternative to welding. The intense heat of welding will likely burn through or at least warp the thin section. Heat the joint where the two pieces of metal will meet until the joint glows. 3 1 the american welding society defines brazing as a group of welding processes wherein coalescence is produced by heating to suitable temperatures above 449 c 840 f and by using a nonferrous filler metal having a melting point below that of the base metal.

To maximize corrosion resistance of a joint select a brazing filler metal containing such elements as silver gold or palladium which are inherently corrosion resistant. Quick and easy brazing aluminum copper and nonferrous metals. For instance brazing is the better option on a t joint with 0 005 in. For large areas heat portions of the joint to temperature and then move to the next adjacent area.

In any case proper cleaning and fluxing are essential. The equipment in this project can be bought for as little as 30 dollars. Sheet metal bonded to 0 5 in. Brazing is also much easier then welding it s a lot like using a glue gun.

After brazing use a wire brush to clean the brazed surface to remove any oxidation or residue. We have developed and are refining a variety of products of this sort. Brazing differs from welding in that it does not involve melting the work pieces and from soldering in using higher temperatures for a similar process while also requiring much more closely fitted parts than when soldering. Brazing is distinguished from welding because it uses an intermediary material usually a copper zinc alloy to join the two metal pieces rather than melting the pieces themselves.

Keep joint clearances close and use a minimum amount of filler metal so that the finished joint will expose only a fine line of brazing filler metal to the atmosphere. Apply the brazing rod to the joint while continuing to heat the metal surfaces. Brazed metal can also be stronger then w.