NIMONIC® alloy 901 is a nickel-chromium superalloy renowned for its exceptional strength, high-temperature stability, and excellent corrosion resistance. Developed for demanding applications in aerospace, gas turbine engines, and industrial processes, NIMONIC® alloy 901 offers reliability and performance under extreme conditions.
Chemical Composition
Element
Composition (%)
Nickel (Ni)
40.0-45.0
Chromium (Cr)
11.0-14.0
Iron (Fe)
12.5-15.0
Titanium (Ti)
2.4-3.1
Aluminum (Al)
2.4-2.7
Molybdenum (Mo)
2.6-3.1
Cobalt (Co)
0.1-0.6
Carbon (C)
0.05 max
Silicon (Si)
0.5 max
Sulfur (S)
0.015 max
Phosphorus (P)
0.015 max
Mechanical Properties
Property
Value
Tensile Strength (RT)
1275 MPa (185 ksi) min
Yield Strength (0.2% offset) (RT)
1035 MPa (150 ksi) min
Elongation (RT)
20% min
Reduction of Area
25% min
Hardness (HB)
360 HB max
Performance at Different Temperatures
Temperature Range
Performance
Room Temperature
High strength and corrosion resistance
Elevated Temperatures (up to 650°C / 1200°F)
Excellent creep resistance and thermal stability
Cryogenic Temperatures
Retains ductility and toughness
Industry Applications
NIMONIC® alloy 901 finds extensive use in critical applications:
Industry
Applications
Aerospace
Turbine blades, compressor discs, fasteners
Power Generation
Gas turbine components, thrust reversers
Oil & Gas
Wellhead components, valve stems
Automotive
Turbocharger rotors, exhaust valves
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
Forgings
Various shapes and sizes as per standards
Production Standards and Corresponding Grades
Country
Standard
Corresponding Grade
United States
AMS 5660
UNS N09901
Germany
DIN 17742
2.4662
France
AFNOR NC 20T
–
United Kingdom
BS HR 403
HR403
Japan
JIS HR 403
–
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 ductility and toughness at high temperatures
Costlier compared to some alternatives
Suitable for complex components and high-temperature applications
Similar Products
Material Grade
Comparison
Nimonic 90
Similar composition with higher cobalt content
Inconel® 718
Higher nickel content, different applications
Conclusion
NIMONIC® alloy 901 stands out as a reliable material choice for applications requiring strength, corrosion resistance, and thermal stability at high temperatures. Its precise chemical composition, coupled with robust mechanical properties and adherence to international standards, ensures durability and performance in demanding environments such as aerospace and power generation. Designers and engineers looking for high-performance alloys can trust NIMONIC® alloy 901 for consistent reliability and longevity.
For further technical specifications and tailored solutions, consulting with material suppliers and referencing specific product data sheets is recommended.
