Stud Bolt Failure due to LME (liquid metal embrittlement 1

[QABossman1]

All:

My company has experienced some ASTM A193 B7 stud bolt failure due to a cadmium coating of stud material at higher temperatures. The higher temperature caused the coating to melt and proprogate into grain structure, thus causing failure due to the LME (liquid metal embrittlement).

Does anyone know of any any anti-sieze compounds causing LME?

 

[unclesyd]

The plating on your fasteners caused th LME.

There is a possibility that your anti seize could have acted as a flux of the Cadmium.

What was your anti-seize?

All your anti seize compounds will carry an upper temperature limit based on the material in the compound. As far as I know there is no anti-seize by itself will cause LME.
Materials like Lead, Cadmium, and Zinc were used at one time, but no more. MoS2 tops out at 800°F. Graphite based at 1000°F while the Copper, Nickel, and Silver ones go quite a bit higher. If based on oxides even higher.