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 It has largely been superseded by Nimonic 90 and Inconel X-750, but because of the low Cobalt content, it is still specified for nuclear applications.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Largely superseded by Nimonic 90 & Inconel X-750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 |
| °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 depending on load^^ and environment |
| 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.