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Nimonic® 90
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Nimonic® 90

Available in any of the 'profile options'

A Nickel-Chromium-Cobalt alloy being precipitation hardenable, having high stress-rupture strength and creep resistance at high temperatures up to about 950oC (1740oF). It is widely used and a well proven alloy in high temperature conditions.

Chemical Composition Specifications Designations Key Features Typical Applications
Element Min % Max %
Ni bal
Cr 18.00 21.00
Fe 1.50
Ti 2.00 3.00
Mn 1.0
Si 1.0
C 0.13
Al 1.00 2.00
Co 15.00 21.00
S 0.015
Cu 0.20
B 0.02
Pb 0.002
Zr 0.15
Ag 0.0005
Bi 0.0001
AMS 5829
BS HR 501
BS HR 502
BS HR 503
BS 3075 NA 19
ISO 15156
(NACE MR 0175)
NCK 20TA
W.Nr 2.4632
W.Nr 2.4969
UNS N07090
AWS 030
High stress rupture strength and high creep resistance at high temperatures
Good resistance to high-temperature corrosion and oxidation
Age hardenable
High temperature dynamic applications
Aerospace fasteners
Density 8.18g/cm³ 0.296 lb/in³
Melting Point 1370°C 2500°F
Coefficient of Expansion 12.7 μm/m °C (20 – 100°C) 7.1 x 10-6 in/in °F (70 – 212°F)
Modulus of Rigidity 82.5 kN/mm² 11966 ksi
Modulus of Elasticity
(Annealed + Aged)
(Spring Temper + Aged)
213 kN/mm²
227 / 240 kN/mm²
30894 ksi
32924 / 34810 ksi
Heat Treatment of Finished Parts
Condition as supplied by Alloy Wire Type Temperature Time (Hr) Cooling
°C °F
Annealed Age Harden 750 1380 4 Air
Spring Temper Age Harden 650 1200 4 Air
Spring Temper Age Harden 600 1110 16 Air
Properties
Condition Approx. tensile strength Approx. operating temperature
N/mm² ksi °C °F
Annealed 800 – 1000 116 – 145
Annealed + Aged 1200 – 1400 174 – 203 up to 550 up to 1020
Spring Temper 1300 – 1500 189 – 218
Spring Temper + Aged 1500 – 1800 218 – 261 up to 350 up to 660

The above tensile strength ranges are typical. If you require different please ask.

*Trade name of Special Metals Group of Companies

Dynamic applications

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