Nimonic® 80A

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 It has largely been superseded by Nimonic 90 and Inconel X-750, but because of the low Cobalt content, it is still specified for nuclear applications.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

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Largely superseded by Nimonic 90 & Inconel X-750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
Specifications
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Largely superseded by Nimonic 90 & Inconel X-750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

Chemical Composition

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

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

<table>
<tbody>
<tr class=”title”>
<td rowspan=”2″>Condition</td>
<td colspan=”2″>Approx. tensile strength</td>
<td colspan=”2″>Approx. operating temperature</td>
</tr>
<tr class=”title”>
<td>N/mm²</td>
<td>ksi</td>
<td>°C</td>
<td>°F</td>
</tr>
<tr>
<td>Annealed</td>
<td class=”yellow-bg”>800 – 1000</td>
<td class=”lyellow-bg”>116 – 145</td>
<td class=”yellow-bg”>–</td>
<td class=”lyellow-bg”>–</td>
</tr>
<tr>
<td>Annealed + Aged</td>
<td class=”yellow-bg”>1200 – 1400</td>
<td class=”lyellow-bg”>174 – 203</td>
<td class=”yellow-bg”>up to 550</td>
<td class=”lyellow-bg”>up to 1020</td>
</tr>
<tr>
<td>Spring Temper</td>
<td class=”yellow-bg”>1300 – 1500</td>
<td class=”lyellow-bg”>189 – 218</td>
<td class=”yellow-bg”>–</td>
<td class=”lyellow-bg”>–</td>
</tr>
<tr>
<td>Spring Temper + Aged</td>
<td class=”yellow-bg”>1500 – 1800</td>
<td class=”lyellow-bg”>218 – 261</td>
<td class=”yellow-bg”>up to 350</td>
<td class=”lyellow-bg”>up to 660</td>
</tr>
</tbody>
</table>

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