SAE AMS5441
Nickel Alloy, Corrosion and Heat-Resistant, Bars, Forgings and Rings, Ni -18Cr - 2.8Mo - 5.5Cb(Nb) - 0.70Ti - 1.50Al - 10Fe - 9Co - 1W, Consumable Electrode Remelted or Vacuum Induction Melted 1775 °F (968°C) Solution Heat Treated, Precipitation-Hardenable.