In Angry Birds Seasons, the iron is indestructible but can be thrown at lava and melt. In Angry Birds Star Wars, Chuck "Ham" Solo can break iron with 3 lasers. The lasers will reflect so they can hit other Pigs. It serves as steel in Angry Birds Star Wars because once shot with lasers or damaged by a lightsaber, it will appear inside of the wood/glass/hard metal.
|Angry Birds||Glass • Wood • Stone • Grey Blocks|
|Angry Birds Seasons||Gold • Clouds • Snow • Ghost Blocks|
|Angry Birds Rio||Sand • Iron|