SAE AMS5664D
Nickel Alloy, Corrosion and Heat Resistant, Bars, Forgings, and Rings, 52.5Ni - 19Cr - 3.0Mo - 5.1Cb - 0.90Ti - 0.50A1- 18Fe, Consumable Electrode or Vacuum Induction Melted, 1950 °F (1066 °C) Solution Heat Treated, Precipitation Hardenable.