Consuming Mercury would give you a 2x car sheet metal thick full dyson sphere made of iron.
Earth, Mars and Venus each have about 10x the iron of Mercury. The asteroid belt is inconsequential.
If you consume all the iron core planets, you have about 5 cubic centimeter of iron to play with for each square centimeter of dyson sphere area.
There's a lot of unknowns for the gas giants, particularly what % of them contains iron, but Jupiter /might/ have as much as 100x earth heavy elements (including iron), but these would be at its core, and its not totally clear how you would extract them.
I think the key question is what sort of stresses you expect the sphere to be under, and thereby what materials and tensile strengths are required. It would not surprise me if the stress is basically nil (in theory you could orbit a sphere made of iron dust?) or totally infeasible for iron.
Earth, Mars and Venus each have about 10x the iron of Mercury. The asteroid belt is inconsequential.
If you consume all the iron core planets, you have about 5 cubic centimeter of iron to play with for each square centimeter of dyson sphere area.
There's a lot of unknowns for the gas giants, particularly what % of them contains iron, but Jupiter /might/ have as much as 100x earth heavy elements (including iron), but these would be at its core, and its not totally clear how you would extract them.
I think the key question is what sort of stresses you expect the sphere to be under, and thereby what materials and tensile strengths are required. It would not surprise me if the stress is basically nil (in theory you could orbit a sphere made of iron dust?) or totally infeasible for iron.