Steel is most economical, strong and reasonably easy to work with.
Cars were traditionally made out of steel and aluminum, but it is much more common to see cars with an abundance of fiberglass or plastic body panels.
For the most part the entire body is made of steel. Some cars have aluminum hoods, trunk lids, and even fenders. There have been cars where the entire body was aluminum or carbon fiber. Some engine parts are steel, wheels may be steel, and other parts in the car are made of steel.
The body type of Renault Espace cars is made of fiberglass. It is mounted on a warm-steel mounted chassis. The same way most cars are done by Renault Espace.
Apart from a few unusual cars that have body panels made of plastic, aluminum or another metal, the vast majority of cars have body parts made from mild steel sheeting. Mild steel is mostly made from iron with a tiny amount of carbonmixed in it. If too much carbon is in the steel it becomes very brittle. Too little or none at all and it becomes too soft. In mild steel around 0.1 - 0.5% is carbon which keeps the steel strong without it becoming brittle.
The body type of Renault Espace cars is made of fiberglass. It is mounted on a warm-steel mounted chassis. The same way most cars are done by Renault Espace.
they are made of steel and plastic
Steel is strong and durable. Steel is also easy to mold into different shapes. Cars are also being made out of aluminum, plastic, and carbon fiber.
Steel is cheaper and easier to weld, and form into complex shapes. There are some cars made from aluminum.
Car frames are made of steel.
The most widely used material are various steel alloys, but there are options. Some cars may have hoods/bonnets, and even body panels out of plastics. Some are made partly of aluminium.
In batteries the plates are made of lead. Body panels are often made of the compounds steel or carbon fibre. Some manufacturers use body panels that are made from the element Aluminum.
Steel - strength Aluminum - light weight