SUS409L Stainless Steel: Automotive Grade with Good Weldability

Key Characteristics

Stabilization: Niobium (Nb) forms stable carbides, preventing chromium carbides from forming at grain boundaries, which would otherwise cause corrosion.

Corrosion Resistance: Excellent resistance to intergranular corrosion after exposure to high temperatures (800-1500°F / 427-815°C).

High-Temperature Performance: Better creep and stress-rupture strength than 304/304L, resisting oxidation up to 1500°F (815°C).

Weldability: Ideal for welding without post-weld heat treatment, as it avoids sensitization.

Non-Magnetic: It is non-magnetic in the annealed condition.

Typical Applications

Aerospace: Aircraft exhaust systems, manifolds, engine parts.

Chemical & Petrochemical: High-temperature piping, reactors, processing equipment.

Power Generation: Boiler components, steam lines, superheater tubes.

Heat Treatment: Furnace parts, high-temperature fixtures.