Historical
SAE AMS 7727E-2006 (SAE AMS7727E-2006)
Iron-Nickel-Cobalt Alloy, Bars and Forgings, 53Fe - 29Ni - 17Co, Low Expansion, Glass Sealing
This specification covers an iron-nickel-cobalt alloy in the form of bars and forgings.
Those products have been used typically for electronic elements to be sealed to hard glasses during assembly, but usage is not limited to such applications.
Society of Automotive Engineers [sae]