This paper discusses the application in shipbuilding of 4 one-half percent Mg-Al-alloys in cryogenic containment vessels for liquefied natural gas (LNG). Metallurgy, physical and mechanical properties are described. The welding methods, the related welding defects and their bearing on safety and performance are considered together with the necessity for inspection and control. The limitations of the various non-destructive methods are underlined.
IIW (Intl Inst of Weld) Public Sess and Met Techn Conf, Sydney, Australia, 21-28 August 1976.