The automotive industry primarily uses the 35S20 steel grade in automotive engineering. This steel grade is commonly used in the production of various automotive components, such as chassis, suspension systems, steering components, and other structural parts. The high yield and tensile strength of the 35S20 steel grade make it suitable for applications that require high strength and durability, such as in the automotive industry. Additionally, the chemical composition of this steel grade is optimized for automotive applications, providing good weldability and formability, which are important properties in the manufacturing process of automotive components.