Description

Incoloy 800H is an iron-nickel-chromium alloy having the same basic composition as Incoloy 800, with significantly higher creep rupture strength. The higher strength results from close control of carbon, aluminum and titanium contents in conjunction with a high temp anneal. The alloy's modification was to control carbon (0.05 to 0.10%) and grain size to ( greated than ASTM 5) to optimize stress rupture properties. The alloy has further modifications to the combined titanium and aluminum levels (0.85 to 1.2%) to ensure optimum high temperature properties. The alloy is dual certified and combines the properties of both forms. The alloy is capable of remaining stable and maintaining its austenitic structure even after long time exposures to high temperatures.