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As a specialist in high-performance materials, we provide NIMONIC alloy 90 (UNS N07090 / W. Nr. 2.4632), a premier nickel-chromium-cobalt superalloy engineered for exceptional strength and corrosion resistance at elevated temperatures up to 920°C (1688°F). This precipitation-hardenable alloy is the benchmark for demanding applications in aerospace, industrial gas turbines, and turbocharger systems, where its superior creep rupture strength and outstanding oxidation resistance ensure long-term reliability and performance. If your projects involve critical components like turbine blades, discs, rings, or high-integrity fasteners, NIMONIC 90 offers the proven metallurgical stability to maximize service life under extreme thermal and mechanical stress. Partner with us for expert technical support and reliable supply of this industry-leading superalloy.
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NIMONIC alloy 90 (UNS N07090/W. Nr. 2.4632)
NIMONIC alloy 90 (UNS N07090/W. Nr. 2.4632)is a wrought nickel-chromium-cobalt base alloy strengthened by additions of titanium and aluminum. It has been developed as an age-hardenable creep resisting alloy for service at temperatures up to 920°C (1688°F. The alloy is used for turbine blades, discs, forgings, ring sections and hot-working tools.
Chemical Composition
Carbon........................................................................0.13 max.
Silicon ...........................................................................1.0 max.
Copper..........................................................................0.2 max.
Iron................................................................................1.5 max.
Manganese ...................................................................1.0 max.
Chromium....................................................................18.0-21.0
Titanium...........................................................................2.0-3.0
Aluminum ........................................................................1.0-2.0
Cobalt..........................................................................15.0-21.0
Boron ..........................................................................0.02 max.
Sulfur ........................................................................0.015 max.
Lead........................................................................0.0020 max.
Zirconium....................................................................0.15 max.
Nickel.............................................................................Balance
Heat Treatment
The heat treatments recommended are as follows:
Bar 8 h/1080°C(1975°F)/AC + 16 h/700°C (1290°F)/AC
Sheet 3 min/1150°C(2100°F)/FBQ or WQ + 1 h/925°C(1700°F)/AC + 4 h/750°C (1380°F)/AC
Welded sheet 3 min/1150°C(2100°F)/FBQ or WQ + weld + 1 h/925°C(1700°F)/AC + 4 h/750°C(1380°F)/AC
Interstage anneal of sheet 20 min/1040°C (1900°F)/AC or WQ
The data for sheet has been obtained from material is given a second stage interstage anneal (20 min/1040°C(1900°F)/AC), which is purely a softening treatment. Improved tensile and rupture ductility can be achieved by using 1 h/925°C(1700°F)/AC as the second stage heat treatment.
Available Products and Specifications
NIMONIC alloy 90 is designated as UNS N07090 and Werkstoff Number 2.4632. Standard product forms are sheet, strip, plate, round bar, flat bar, forging stock, wire and extruded section.
Rod, Bar, Wire and Forging Stock - BS HR2, HR501, HR502 and HR503; SAE AMS 5829; AECMA PrEN 2295, 2296, 2297, 2400, 2401, 2669 and 2670.
Plate, Sheet and Strip- BS HR202, AECMA PrEN 2298.
Pipe and Tube - BS HR402, AECMA PrEn 2299.
Applications
NIMONIC Alloy 90 is specified for critical components across demanding industries:
Aerospace:
Turbine blades and vanes
Discs and rings for gas turbines
High-strength bolts and fasteners
Combustion chamber components
Industrial Gas Turbines:
Rotor blades and stator vanes
Turbo-supercharger components
Automotive & Racing:
Turbocharger turbines and rotors
High-performance exhaust valves
General Engineering:
Hot-work tooling and dies
Springs for high-temperature service
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