What did Tony Stark replace palladium with?

Related questions

1. Will Iron Man be recast?
2. Why did rhodey get recast?
3. Who is hammer in Marvel?
4. Did Tony Stark remove the shrapnel?
5. How much did Robert Downey Jr make in Iron Man?
6. Does Tony Stark have PhD?
7. Why is Iron Man's blood toxic?
8. Who auditioned for Ironman?
9. Why did rhodey change in Iron Man 2?
10. What happened to Hammer in Iron Man 2?

Tags

1. #subsequent
2. #reactor
3. #called
4. #stark
5. #element
6. #information
7. #novelization
8. #vibranium
9. #captain
10. #first
11. #replace
12. #retcons
13. #palladium
14. #release
15. #created
16. #america
17. #avenger