Formation of complex silicates in low-alloy Cr–Mo heat resistant steels after long-term high-temperature service

Abstract

Many factors are involved in the degradation of low-alloy Cr–Mo steels after long-term high-temperature service. Although non-metallic inclusions are known to have a deleterious effect on these steels, no reports have been made of the effect of long-term high-temperature service on the non-metallic inclusions. The present paper reports observations which indicate the formation of complex silicates in steels under such service conditions and the harmful effect of these inclusions is discussed.

MST/277