Nimonic 80A Nickel Alloy Sheet

Nimonic 80A Alloy Sheet is a wrought, age-hardenable nickel-chromium alloy. Similar to alloy 75 but made precipitation hardenable by additions of aluminium and titanium. Alloy 80A has good corrosion and oxidation resistance and high tensile and creep-rupture properties at temperatures to 815ºC (1500ºF). Vacuum refined versions are also available.

Nimonic 80A has largely been superseded by Nimonic 90 and Inconel X-750, but because of the low Cobalt content, it is still specified for nuclear applications.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 Alloy Sheet performs well in applications where high temperature and continuous stress is a significant consideration. Used for gas-turbine components (blades, rings, discs), bolts, tube supports in nuclear generators Beyond nuclear applications, it is traditionally used in applications such as gas turbines, as well as for exhaust valves in racing engines and spindles and fasteners for the motorsport sector.

The conventional machining techniques used on iron alloys may be used for this alloy. This alloy work-hardens during machining.

Nimonic alloy 80A can be welded using common techniques, using a matching filler metal. A prerequisite for welding is that the metal should be solution treated. Fusion welding by tungsten inert gas welding and metal inert gas welding will be suitable for this alloy.

Can be hot worked at temperature ranges of 1050-1200°C (1920-2190°F).

Can be hot forged at temperatures in the range of 982-1176°C (1800-2150°F).

Cold working may be done on the alloy.

Nimonic alloy 80A should be annealed at 1079°C (1975°F) for about 8 hours and air cooled.

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