Hi temp epoxy choice?

Keven S. Clickner said
Absolutely. I second that. I've repaired machinery parts with that, gearboxes in particular. Pile it into rough shape, allowed to cure. Then I've machined it and tapped it for cover screws.

moroso A-B epoxy was made for that, a friend head porter has used it for yrs., I have used it a couple of times also with no failures ....