more then likely steel, aluminum cans are fairly new when compared to steel cans. aluminum is now used in canning of pop and is very thin i think a few microns is the side wall thickness
Steel Is mainly made out of iron and about 1% carbon, but there can be more or less. the more carbon, the harder and more brittle, and the less, the softer and it is easier to shape. You can add...
Cars, Utensils, some Rulers, Scaffolding, Tools, Wires, Rails for Trains, Hulls of Ships, Major appliances!there are most definitely too many to list here.