SAE AMS5660M
Nickel-Iron Alloy, Corrosion and Heat-Resistant, Bars and Forgings 12.5Cr – 42.5Ni – 6.0Mo – 2.7Ti – 0.015B – 34Fe Consumable Electrode Remelted or Vacuum Induction Melted Solution, Stabilization, and Precipitation Heat Treated
standard by SAE International, 06/15/2020