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 It has largely been superseded by Nimonic 90 and Inconel X-750, but because of the low Cobalt content, it is still specified for nuclear applications.

Nimonic® 80A is also known as Nicrofer 7520 Ti, Pyromet 80A, Superimphy 80A, and Udimet 80A.

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Largely superseded by Nimonic 90 & Inconel X-750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
Condition as supplied by Alloy Wire	Type	°C	°F	Time (Hr)	Cooling
Annealed	Age Harden	700	1290	16	Air
Spring Temper	Age Harden	600	1110	16	Air

Properties
Condition	Approx. tensile strength		Approx. operating temperature depending on load^^ and environment
Condition	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