Aluminum was entirely unobtainable in ancient times, I believe. It fuses with carbon as well as oxygen, so there was no way to refine it. And it would have made terrible armor, being quite a lot softer than steel. It also suffers from fatigue failures much more easily than steel. These are some of the reasons it makes a bad, though cheap, material for bikes.
Pure aluminum can be found without reducing it yourself, but it’s very rare. You’d have to pluck it out of the interior of a volcano or the bottom of the sea- and so it seems possible that some could end up in the hands of a medieval smith, but very unlikely.
Aluminum was entirely unobtainable in ancient times, I believe. It fuses with carbon as well as oxygen, so there was no way to refine it. And it would have made terrible armor, being quite a lot softer than steel. It also suffers from fatigue failures much more easily than steel. These are some of the reasons it makes a bad, though cheap, material for bikes.
Pure aluminum can be found without reducing it yourself, but it’s very rare. You’d have to pluck it out of the interior of a volcano or the bottom of the sea- and so it seems possible that some could end up in the hands of a medieval smith, but very unlikely.
Oh, I don’t know, one would say the same thing about meteoritic iron, and yet there are well documented uses of it.
(Although apparently the Sword of Attila wasn’t really meteoritic and I got that from fiction.)