Nimonic 80A/UNS N07080/2.4952 Nimonic 80A (UNS N07080/W. Nr. 2.4952) is a nickel chromium alloy 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 up to 1500 deg F.