Through correct preparation, it is easier to avoid the pitfalls that can trap the unwary. Therefore, below are a few facts on base metals, welding methods, types of joint and filler metals.
Aluminiums occur in various degrees of purity.
In the case of hardenable alloys with copper and lead additives, there is a risk of hot cracking and therefore they are difficult to weld. Many casting alloys are also suitable for welding except in the case of those which have high content of copper or magnesium which are unsuitable for welding. Welding Methods Aluminium is an easily welded metal. However, consideration must be given to both the welding method, the type of joint and the filler material. The two dominating welding methods are MIG and TIG welding, but also gas, plasma, and resistance welding are used as well as welding with covered electrodes.