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Nimonic® 80A
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Nimonic® 80A

Available in any of the 'profile options'

Nimonic 80A is a Nickel-Chromium alloy which is precipitation hardenable. It has largely been superseded by Nimonic 90 and Inconel X-750, but because of the low Cobalt content, it is still specified for nuclear applications.

Chemical Composition Specifications Designations Key Features Typical Applications
Element Min % Max %
C 0.04 0.10
Si 1.00
Mn 1.00
S 0.015
Ag 0.0005
Al 1.00 1.80
B 0.008
Bi 0.0001
Co 2.00
Cr 18.00 21.00
Cu 0.20
Fe 1.50
Pb 0.002
Ti 1.8 2.70
Ni bal
ASTM B637
BS 3076 NA 20
BS HR 1
BS HR 601
W.Nr 2.4952
W.Nr 2.4631
UNS N07080
AWS 031
Largely superseded by Nimonic 90 & Inconel X-750
Still specified for nuclear applications due to low cobalt content
Age hardenable
High temperature dynamic applications
Gas turbine components
Nuclear industry
Fasteners
Density 8.19g/cm³ 0.296 lb/in³
Melting Point 1365°C 2490°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 85 kN/mm² 12328 ksi
Modulus of Elasticity 222 kN/mm² 32199 ksi
Heat Treatment of Finished Parts
Condition as supplied by Alloy Wire Type Temperature Time (Hr) Cooling
°C °F
Annealed Age Harden 700 1290 16 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 = active / lively / changing

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