SAE AMS5664C-1990
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 1950°F (1066°C) Solution Heat Treated@ Precipitation Hardenable (UNS N07718)