NIMONIC® alloy 90 is a nickel-chromium-cobalt alloy known for its high strength and excellent corrosion resistance at elevated temperatures. Developed for applications requiring robust performance in aggressive environments, this alloy finds extensive use across various industries.
Chemical Composition
Element
Composition (%)
Nickel (Ni)
53.0-57.0
Chromium (Cr)
18.0-21.0
Cobalt (Co)
15.0-21.0
Iron (Fe)
2.0 max
Molybdenum (Mo)
1.0-1.5
Titanium (Ti)
2.0-3.0
Aluminum (Al)
1.0-2.0
Carbon (C)
0.13 max
Silicon (Si)
0.5 max
Manganese (Mn)
1.0 max
Sulfur (S)
0.015 max
Phosphorus (P)
0.02 max
Mechanical Properties
Property
Value
Tensile Strength (RT)
950 MPa (138 ksi) min
Yield Strength (0.2% offset) (RT)
690 MPa (100 ksi) min
Elongation (RT)
20% min
Creep Rupture Strength
Excellent at high temperatures
Hardness (HV)
280-320 HV
Performance at Different Temperatures
Temperature Range
Performance
Room Temperature
High strength and corrosion resistance
Elevated Temperatures (up to 750°C / 1380°F)
Excellent creep resistance and thermal stability
Cryogenic Temperatures
Retains ductility and toughness
Industry Applications
NIMONIC® alloy 90 is utilized in various demanding applications:
Industry
Applications
Aerospace
Gas turbine components, high-temperature fasteners
Power Generation
Turbine blades, high-temperature bolts
Oil & Gas
Wellhead components, valve stems
Automotive
Exhaust valves, turbocharger rotors
Shapes, Sizes, and Production Standards
Shapes and Sizes
Form
Size Range
Sheets
Thickness: 0.5 mm – 6 mm
Plates
Thickness: 1 mm – 100 mm
Bars
Diameter: 6 mm – 200 mm
Wire
Diameter: 0.1 mm – 10 mm
Forgings
Various shapes and sizes as per standards
Production Standards and Corresponding Grades
Country
Standard
Corresponding Grade
United States
AMS 5829
N07090
Germany
DIN 17745
2.4632
France
AFNOR NC 20T
–
United Kingdom
BS HR 402
HR402
Japan
JIS HR 402
–
China
GB/T 14992
–
Welding, Machining, Polishing, Heat Treatment, and Cold Working
Process
Details
Welding
TIG and MIG methods recommended; post-weld heat treatment required
Machining
Carbide tools and lubricants for optimal results
Polishing
Mechanical and electrochemical methods for desired finish
Heat Treatment
Solution annealing followed by aging
Cold Working
Cold forming and shaping processes are feasible
Advantages and Disadvantages
Aspect
Advantages
Disadvantages
Advantages
High strength and corrosion resistance
Limited availability in certain forms
Excellent creep resistance
Machining can be challenging
Good thermal stability at high temperatures
Costlier compared to some alternatives
Versatile in high-temperature applications
Similar Products
Material Grade
Comparison
NIMONIC® alloy 80
Similar composition with lower cobalt content
Inconel® 718
Higher nickel content, different applications
Conclusion
NIMONIC® alloy 90 offers exceptional performance in high-temperature environments, making it a preferred choice in aerospace, power generation, and oil & gas industries. Its robust mechanical properties, combined with reliable corrosion resistance and thermal stability, ensure reliable operation in challenging conditions. Designers and engineers seeking durable materials for critical applications can rely on NIMONIC® alloy 90 for optimal performance and longevity.
For detailed technical specifications and customized solutions, consulting with material suppliers and referencing specific product data sheets is recommended.
