405 is a lower-cost ferritic stainless steel with aluminum addition instead of titanium. It offers moderate corrosion resistance and good weldability, often used where high polish is not required.
Key Properties
Weldability: Better weldability than other ferritic grades due to aluminum.
Corrosion: Moderate resistance to atmospheric corrosion and fresh water.
Cost: Economical alternative to 430 for less demanding uses.
Ductility: Good formability for simple shapes.
Common Applications
Industrial: Drip pans, quench tanks, and annealing boxes.
Automotive: Underbody components and non-visible trim.
Construction: Roofing and siding for agricultural buildings.
General: Parts requiring moderate heat and corrosion resistance.