What is the most common material used for automotive coil springs?

The most common material used for automotive coil springs is steel. Steel is favored for coil springs due to its high tensile strength, durability, and ability to withstand the repeated stress and strain that occurs in suspension systems. This versatility allows steel springs to maintain their shape and performance over time, even under heavy loads or in challenging driving conditions.

Steel springs can also be easily manufactured into various shapes and sizes, making them suitable for a wide range of vehicle applications. Their resilience ensures that they can effectively absorb shocks and maintain ride comfort, which is essential for vehicle performance and safety. While other materials like aluminum, plastic, and carbon fiber may offer certain advantages in terms of weight or specialized applications, they are not as commonly used in standard automotive coil spring manufacturing due to factors like cost, performance, and long-term durability.