800H (NCF 800H, UNS N08810)/NAS 800T (UNS N08811) are nickel-iron-chromium alloys that provide high strength and excellent resistance to oxidation and carburization at high temperatures. High creep strength is attained through control over crystal grains¡ªvia high temperature heat treatment, together with fine control over carbon, titanium, and aluminum content. Nippon Yakin provides this product in plate, sheet, and strip forms.