Abstract
The paper present the practical aspect of welding of metals used at low temperature such as LNG tank.
Aluminum killed steel, high teusile strength steel and low nickel contained steel, which are used at higher than -100°C, and 9% nickel steel, aluminum alloy, stainless steel and invar, which are used at higher temperature than -196°C are discussed in the paper. Filler metals, welding method and the mechanical properties of welded joint are also reported. And some explanation is given for the LNG tank.
Certain suggestions for further study for improving the metals and welding procedure are indicated.
