Development of novel iron-chromium and iron-aluminium alloys for applications at high temperatures

Heat-resistant ferritic alloys usually show higher heat conductivities and lower thermal expansions than austenitic ones, which is beneficial for applications in energy conversion units. However, the high-temperature strength of ferritic alloys is lower than that of austenitic ones. Special ferritic iron-chromium and iron-aluminium alloys are strengthened by the formation of intermetallic phases and are optimised with respect to high-temperature strength, formability and corrosion resistance.