Can You Solder Aluminum Foil There s a kit of solder plus flux intended for the hvac repair industry repair of aluminum evaporator or condenser coils that i ve used to solder aluminum sheets together to make simple enclosures.

Can you solder aluminum foil Many of them can be soldered using the same method but there are a few which are very hard to work with thus requiring to be attended by a professional welder.

Can you solder aluminum foil. A basic demonstration on welding aluminum with brazing rod and a propane torch. Arc welding using argon gas to prevent oxidation is only method to fuse aluminum and it has to be thicker than foil. This is particularly true when it comes to aluminum alloys. 1100 3003 and 6061 are perfect alloys but stay away from 5000 series because the flux will not handle it.

Although pure aluminum can usually be soldered it is considered a hard metal and therefore not easy to work with. Even with the right flux and solder combination you won t achieve soldering if the aluminum isn t hot enough to accept the solder alloy. Most of these can be soldered the same way but a few of them are very difficult to work with and may need to be taken to a professional welder. Pure aluminum can be soldered although it is not an easy metal to work with.

Many aluminum objects are actually aluminum alloys. Melting temperature is around 750f 400c. Flux isn t necessary but can be used. You can hold a torch to foil and then touch it immediately with your finger and not even feel warm.

It is too thin and aluminum carries heat away too quickly. The flux is non corrosive and so no cleanup is required. You can not solder aluminum.