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A126 gray cast iron - avoiding dissimilar metals

A126 gray cast iron - avoiding dissimilar metals

A126 gray cast iron - avoiding dissimilar metals

(OP)
I am making a threaded insert to repair an A126 casting.
The insert will be threaded into the casting and then pinned axially at the edge to prevent it from rotating out. I will use LOCTITE to remove as much of the space from the insert threads and to protect (somewhat) from galvanic corrosion.  With this chemistry, A126, what could be used as a suitable insert material and not interact much with the casting material?
I want to avoid any galvanic corrosion because this area will not be visible.

Base material is gray cast iron, A126
Thanks,
AWOL

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