Let’s turn this around and look at the one place on Earth we know has more pressure than anywhere else: Challenger Deep, the deepest part of the Mariana Trench. It’s almost 7 miles down. If you drop a 100 kg steel ball down into the ocean there, that ball will not vaporize. It might, however, get smaller.
The same would happen to the steel ball on Jupiter. It’s thought that somewhere down there inside Jupiter the gravity is so intense that gas forms a solid core, and the pressures are much greater than at Challenger Deep. So your steel ball might get crunched down, but never vaporized.