Design of Creep-Resistant Ferritic-Steel Welding Alloys

Abstract

Ferritic steels have relatively low thermal expansion coefficients and can be alloyed to resist creep and oxidation during prolonged service at temperatures which can exceed 600°C. Their use in the construction of power plant places severe demands on welding alloys. The acceptability of a weld metal depends not only on the mechanical properties, but also on the ability of the welded joint to be heat-treated in a manner which is compatible with the parent materials.