PROGRESS IN CRYOSTRUCTURAL MATERIALS AND THEIR WELDING IN THE USSR.

Abstract

At present, welds are used in the majority of structures, and therefore, the main requirement for materials is good weldability. This term implies not only the possibility of obtaining permanent joints of the given materials within the entire range of thicknesses by means of available methods of welding but, what is especially important, the conservation of strength, ductility, and brittle fracture resistance in the heat-affected zone at cryogenic temperatures. The most common cryogenic structures are pipelines and tanks for storing, producing, and transporting liquefied gases. The most common materials used in cryogenic structures are steel and nickel alloys and, to a lesser degree, aluminum, copper, and titanium.