If the City of Brass were a city sized space ship...

[yellowdingo]

What kind of metal would The City of Brass be made from just to look Brass? Its a city sized spaceship so who cares what its made of?

[Shadowborn]

Adding aluminum to brass makes it stronger and more resistant to corrosion. And apparently combinations of iron, aluminium, silicon and manganese added to brass make it more resistant to general use and abuse.

[LazarX]

yellowdingo wrote:

What kind of metal would The City of Brass be made from just to look Brass? Its a city sized spaceship so who cares what its made of?

Since it would be a magical spaceship, it would still be made of Brass. It's magical Brass after all, it's not melting in the Plane of Fire even after untold eons.