Nimonic 91 is a wrought nickel-chromium-cobalt based alloy strengthened by additions of aluminum and titanium. This alloy is a modification of Nimonic alloy 90, but has an increased chromium content to improve corrosion resisistance in salt and sulfur contaminated environments.
Chemical Composition, %
Typical Physical and Mechanical Properties (RT, Annealed)
|Density, g/cm3||Melting Point, ℃||Tensile Strength, MPa||Yield Strength, MPa||ELongation, %||Hardness, HRB|
Available Products and Specifications
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|Plate, Sheet and Strip||–|
|Pipe and Tube||–|
Nimonic 91 is suitable for long service up to about 900°C. It combines good strength and ductility with stability of microstructure and excellent resistance to hot corrosion.
Nimonic 91 is intended for high-temperature stressed parts such as blades in gas turbines burning impure fuels or operating in marine environments.