Equivalent designations UNS N08810 DIN W. Nr. 1.4958 Form ASTM Rod and bar B 408 Plate, sheet and strip A 240, A 480, B 409, B 906 Seamless pipe and tube B 407, B 829 Welded pipe B 514, B 775 Welded tube B 515, B 751 Welding fitting B 366 Forging B 564 Chemical composition % Fe Ni Cr C Mn Si S Cu Al Ti min 39.5 30.0 19.0 0.05 0.15 0.15 max 35.0 23.0 0.10 1.50 1.00 0.015 0.75 0.60 0.60 Physical properties Density 7.94 g/cm3 Melting range 1357-1385℃ Features: Incoloy 800H has a restricted carbon content range of 0.05 to 0.10%, which is in the upper portion of that of Incoloy 800, and is annealed at 1149 to 1177℃ (Incoloy 800 is annealed at 983 to 1038℃). These differences impart it to have higher stress rupture and creep properties than Incoloy 800. Applications: Chemical and petrochemical process piping, high temperature heat exchangers, furnace components, carburizing equipment, heating-element sheathing, and nuclear power steam superheating tubing.