Because it is cheap and lightweight.
Most cars have very little aluminum so your question has no relevance.
Aluminium has a low density and is not corroded.
yo i really rock
Production of aluminium pollutes the environment and risks the planet and human lives.
aluminium
It's light and strong.
in standard production cars its plain old steel.However,in specialist cars, racing cars, expensive sports cars etc weight reduction is more important than cost. Here you may see kevlar, aluminium,and a number of high strength low weight alloys in use.
Steel.
No list available, but almost all cars can have either type
Cars made from aluminium use less fuel than cars made from steel because aluminium has a low density this makes the car to be lightweight. Whereas with steel, it has a high density so it makes the car to be very heavy. So if steel was used over the same journey more fuel would have to be used and therefore less fuel would be used if you used the metal aluminium.
It is believed that there are about 70 million cars in China. China is surpassing the US in the use and production of cars.
It's a wheel
USA
The Production Budget for Cars was $70,000,000.
The Production Budget for Cars 2 was $200,000,000.
Most cars have very little aluminum so your question has no relevance.
Aluminium has a low density and is not corroded.