Abstract
Pulverised coal combustion (PCC) power plant with supercritical (SC) steam parameters have
been operational for over forty years and ultra-supercritical (USC) PCC plant have been
operational for just over twenty years. This significant amount of operating experience is
valuable regarding the performance of high temperatures steels. For example 9–12% chromium
martensitic steels have had problems with cracking and some have not been as strong as they
were projected to be. Additionally, PCC power plant have been operated outside of design
parameters, such as severe cyclic operation, which has resulted in unforeseen problems for high
temperature steels. This report assesses the performance, problems, solutions and research
efforts for high temperature steels used in SC and USC technology.
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