ASM SA-465

T91/P91 - High Strength Ferritic Steel

July, 1993

ASM International

Click Here for Purchase Information

View Sample Alloy Digest Data Sheet (PDF)



Since 1952, Alloy Digest has been the leading reference for materials property data on metals and alloys used throughout the world. Featuring graphs, charts and tables, these sheets give facts and figures on composition or characterization, physical and mechanical properties, heat treatment, and machinability.



T91/P91 is a ferritic chromium/molybdenum alloy that is microalloyed with vanadium and columbium (niobium) and has nitrogen. The first Super 9% Cr steel was originally approved and developed for superheaters and reheat superheaters.

Keywords :Metals and Metal Alloys, Ferrous alloy, Steel, High-strength steel, Miscellaneous high-strength steel