Whether it is wrought or foundry alloys, aluminum alloys share the presence of a layer of oxide called alumina, which is said to be refractory. This characteristic makes it impossible to weld without a prior pickling (chemical, electronic or mechanical) of that oxide.

Inherent problems when welding aluminum and its alloys :

  • Porosities (due to undissolved hydrogen coming from the base metal, protecting gases or even the electrode's coating).
  • Hot cracking (related to the type of base metal welded).
  • Reduction of the joints resistance (importance of the selection of right filler metal). 
The choice of the filler metal is crucial because it will have influence on : the fluidity, the sensibility to hot cracking, mechanical resistance, joint ductility, corrosion resistance, maintaining service temperature or even the esthetic aspect of the joint.

Consult our metallurgists to help you in your welding projects

Solutions available in:

Covered electrodes
Covered electrodes
Solid wire
Solid wire