Effects of Heat-Affected Zones on the Fracture Toughness of 9% Nickel Steel Used in LNG (Liquefied Natural Gas) Storage Tanks. Volume 2. Final Report September 1982-January 1986

摘要

An extensive experimental and analytical study of the crack arrest capability of 9% Ni steel weldments at cryogenic temperatures (-162 C and -196 C) has been carried out. Five heats of parent steel, with varying levels of Charpy properties and thicknesses in the range 16-28mm, have been examined in detail, with limited testing also being performed on two other heats. Welded panels, using two types of Ni-base consumable and 2 levels of heat input, were prepared, using the shielded metal arc (SMA) process. A wide range of mechanical tests, including Charpy, CTOD, DWT, DWTT, compact crack arrest and wide plate crack arrest tests, were carried out on parent steels and weldments.