This document specifies requirements for resistance spot welding in the fabrication of assemblies of
aluminium sheet, extrusions (both work- and age-hardening alloys) and/or cast material comprising
two or three thicknesses of metal, where the maximum single (sheet) thickness of components to be
welded is within the range 0,6 mm to 6 mm.
This document is applicable to the welding of sheets or plates of dissimilar thickness where the
thickness ratio is less than or equal to 3:1. It applies to the welding of three thicknesses where the total
thickness is less than or equal to 9 mm.
Welding with the following types of machines is within the scope of this document:
— pedestal welding machines;
— gun welders;
— automatic welding equipment where the components are fed by robots or automatic
feeding equipment;
— multi-welders;
— robotic welders.
Information on appropriate welding equipment is given in Annex A and on spot welding conditions in
Annex B. The latter are for guidance only and can require modification depending on service conditions
of the fabrication, type of welding equipment, characteristics of the secondary circuit, electrode
material and geometry.
The welding of coated material, e.g. zinc-coated or anodized material, is outside the scope of
this document.