Study on 36%Ni steel for the membrane of LNG inground storage

摘要

The coefficient of linear thermal expansion of 36%Ni steel is approximately 1/10 of that of austenitic stainless steel SUS304. The membrane of LNG inground storage made of 36% Ni steel would contribute to reduce the construction cost because it is simple structure. The following 5 subjects on 36% Ni steel have been studied to apply to the actual LNG inground storage. (1) physical and mechanical properties (2) welding characteristics (3) mechanical properties of welding joint (4) corrosion characteristics (5) structure of 36%Ni steel membrane According to these studies, we conclude that no technical concern will be anticipated on membrane made of 36%Ni steel.