409 stainless steel is a ferritic stainless steel renowned for its heat resistance, providing superior oxidation and corrosion resistance compared to carbon steel. Initially developed for automotive exhaust systems, 409 is enhanced with titanium stabilization, which improves its durability and performance. Its excellent formability and weldability, combined with inherent corrosion resistance, have expanded its range of applications, making it a versatile choice for various environments beyond its original automotive purpose.