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Nimonic 91

Nimonic 91

NIMONIC alloy 91 is a wrought nickel-chromium-cobalt alloy, reinforced with aluminum and titanium. This variation of NIMONIC alloy 90 increases chromium content to boost corrosion protection against salt and sulfur exposure.

Equivalent grades

• Nimonic 91
• Alloy 91

Chemical Composition Reference


Physical Property Reference

• Density: 8.08 g/cm³

• Tensile Strength: 96 MPa

• Yield Strength: 59 MPa

• Elongation at Break: 21.60%

• Modulus of Elasticity: 132 GPa

Stock & Dimensions

Our warehouse has a large number of stock to provide you with a variety of products in different sizes, and can also customize the size according to your needs.
• Bar: 0.5~600mm Diameter
• Coil: 0.5~150mm Thick
• Plate: 0.5~200mm Thick
• Pipe: 6~630mm External Diameter; 0.5~40mm Wall Tick
• Available in specific sizes

Product Forms

We provide you with a variety of product forms, including but not limited to:
• Bar/Rod
• Pipe/Tube
• Coil/Strip
• Plate/Sheet/Circle
• Wire
• Fitting (Flange, Elbow, Tee...)
• Customize

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Nimonic 91

Essential details
NIMONIC® alloy 91 is a wrought nickel-chromiumcobalt 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.

The alloy 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.


- Gas turbine valves and blades

- Marine environments

- Burning impure fuels

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