409 is a titanium-stabilized ferritic stainless steel designed specifically for automotive exhaust systems. It offers good oxidation resistance at high temperatures and excellent formability.
Key Properties
Heat Resistance: Resists oxidation in exhaust gas environments up to 600-700°C.
Weldability: Titanium stabilization improves weld zone toughness.
Cost: Lower cost than austenitic grades like 304/409M.
Formability: Good ductility for complex exhaust shapes.
Common Applications
Automotive: Exhaust manifolds, catalytic converter shells, and tailpipes.
Agriculture: Grain dryer components and silo vents.
Construction: Heat exchangers and HVAC ducting.
Industrial: Conveyor belts for heat treatment.