Nimonic 80A is a wrought, age-hardenable nickel-chromium alloy designed for components operating under high temperatures and mechanical stress. Also identified as UNS N07080, Alloy 80A, and W.Nr. 2.4631, it is strengthened primarily through additions of titanium, aluminum, and carbon.

With useful mechanical properties and oxidation resistance at elevated temperatures, Nimonic 80A is commonly considered for gas turbines, aerospace engines, and other demanding industrial applications. The alloy is developed for service temperatures up to approximately 815°C (1500°F), depending on the component design and operating conditions.

What Makes Nimonic 80A Different?

The main characteristic of Nimonic 80A is its precipitation-hardening mechanism. Titanium and aluminum contribute to the formation of strengthening precipitates during aging, helping the alloy maintain strength at elevated temperatures.

Its nominal chemical composition is characterized by the following elements:

Chromium contributes to oxidation resistance, while titanium and aluminum are essential to the alloy's age-hardening response. The nickel-rich matrix provides the foundation for its high-temperature performance.

Mechanical Properties and Heat Treatment

Nimonic 80A is supplied in different product forms and heat-treated conditions. Its mechanical properties depend on the manufacturing route, section size, and specified heat treatment.

A representative treatment for extruded bar described in the manufacturer's technical bulletin is:

This treatment promotes the precipitation-hardening response required for high-temperature service. Actual heat-treatment requirements should be confirmed against the applicable product specification and material condition.

Where Is Nimonic 80A Used?

Its combination of high-temperature strength and oxidation resistance makes Nimonic 80A suitable for several demanding applications:

• Gas turbines: turbine blades, rings, and discs.
• Aerospace: aircraft engine components and exhaust-related parts.
• Automotive: high-temperature exhaust valves.
• Power generation: components exposed to elevated operating temperatures.
• Industrial equipment: selected furnace and high-temperature tooling components.

Available Product Forms

Nimonic 80A can be supplied in different forms depending on the application and manufacturing requirements. Common product forms include bars, plates, sheets, and forgings.

Explore our Nimonic 80A material page for additional material information, or view our nickel alloy bar and nickel alloy plate product ranges.

What Should Be Confirmed Before Ordering?

When sourcing Nimonic 80A, buyers should specify the material designation, product form, dimensions, quantity, applicable standard, delivery condition, and inspection requirements. For components exposed to elevated temperatures, the intended service temperature and mechanical property requirements are also important.

Providing these details helps ensure that the supplied material matches the intended manufacturing process and operating conditions.