Dead things remain dead things even when they are unrecognizable - if I state that oil is partially composed of dead dinosaurs most folks won't find that statement disagreeable.
I think it's pretty fair to describe the remains as dead robots similar to folks talking about their coke-bottle decks (recycled plastic) or even a sword forged from the remains of dead robots - I'd still consider that to be made of dead robots even though very little remains outside of the mineral composition.
> if I state that oil is partially composed of dead dinosaurs most folks won't find that statement disagreeable.
I mean, aside from most oil being composed of dead plants rather than dinosaurs (if I remember right). Unless you're counting the bits of dinosaur absorbed by those plants before they turned into oil, but I feel like at some point they stopped being dinosaur and started being plant.
They’re mostly steel which does not melt at those temperatures (and the acidic parts of the atmosphere are much higher altitude), 400-500C. So yeah. Recognizable.