What material is commonly used for the frame of cars?

Steel is commonly used for the frame of cars primarily due to its strength, durability, and ability to absorb impact. The use of steel provides structural integrity and safety, which are crucial for vehicle performance and protection during collisions. Steel can be molded and formed into various shapes, allowing for efficient design and manufacturing processes. It also offers good resistance to corrosion when treated, contributing to the longevity of the vehicle frame.

While wood has historical significance in automotive design, it lacks the structural properties and resilience needed for modern vehicles. Plastic and fiberglass are used in certain components for weight reduction and design flexibility but do not provide the same level of strength required for the frame of a vehicle. Therefore, steel remains the preferred material for car frames in contemporary automotive engineering.