SAE AMS5663E-1987
ALLOY BARS@ FORGINGS@ AND RINGS@ CORROSION AND HEAT RESISTANT 52.5Ni - 19Cr - 3.0Mo - 5.1(Cb + Ta) - 0.90Ti - 0.50Al - 19Fe Consumable Electrode or Vacuum Induction Melted 1750°F (955°C) Solution and Precipitation Heat Treated (UNS N07718)