Specifies the requirements for the welding of aluminium and its weldable alloys in structures, components and equipment complying with AS/NZS 1664.1 or AS/NZS 1664.2, by gas tungsten-arc welding (GTAW), gas metal-arc welding (GMAW), pulsed-arc wleding (GTAW or GMAW) and plasma-arc welding (PAW) processes.