The application of stainless steel in the automotive industry can be roughly classified into five categories: stainless steel for automobile exhaust systems, stainless steel for automobile fuel tanks, stainless steel for automobile frames, stainless steel parts for automobiles, and stainless steel for automobile decoration.

The stainless steel for fuel tanks of automobiles is mainly made of stainless steel. It is required to have excellent stamping and forming properties, welding performance and high corrosion resistance (internal fuel corrosion resistance and external corrosion resistance to harsh environments). Stainless steel, such as SUS304L. The stainless steel for the frame of the car is a high-strength stainless steel plate for automobiles, such as an integral body shell made of ferritic stainless steel, and the service life is generally 15-20 years.

Stainless steel is also used in a variety of automotive parts, such as stainless steel seals, stainless steel plate heat exchangers (using materials such as SUS304, SUS430 and SUS409L), stainless steel fasteners for automotive engine systems and transmission systems (usually stainless steel with SUS410, SUS304) , SUS316, SUS430JIL, SUH660, etc.).

Stainless steel is also used in car decoration, such as stainless steel moldings, antennas, wheel covers or handrails for large passenger cars, safety railings, and hanging bars. Stainless steel pipes are mainly used in passenger car exhaust systems and vehicle decoration in China, among which automotive exhaust systems are mainly used.