NIMONIC® Alloy 80A UNS N07080/W. Nr. 2.4952 & 2.4631

Alloy 80A

Alloy 80A (nimonic) is a nickel-chromium alloy with additions of titanium and aluminium, which enable it to be strengthened by precipitation hardening. This grade is supplied in the solution treated condition for ease of machinability, but an aging treatment will give the material very high mechanical properties, an outstanding resistance to creep at service temperatures up to 815ºC (1500ºF) and a high resistance to fatigue under very arduous conditions.

Alloy 80A offers excellent corrosion resistance in oxidising atmospheres including under cyclical conditions of heating and cooling. This corrosion resistance can be attributed to an adherent chromium oxide film (CrO3) that forms on the alloy surface, which protects it from progressive corrosion and also gives a high scaling resistance at elevated temperatures.

Alloy 80A offers a good machinability, is readily formable and weldable using common welding methods.

Related Specifications of Alloy 80A

BS3076 NA20

BS2 HR1

2.4631

Nominal Composition of Alloy 80A

Ni 75.0%, Cr 20.0%, Fe 3.0% max, Ti 2.2%, Al 1.4%