Grade 409 Ferritic Stainless Steel

Description

Grade 409 is a ferritic stainless steel primarily composed of chromium, with a lower chromium content (10.5-11.75%) compared to other stainless steel grades, making it a cost-effective option for applications where moderate corrosion resistance is sufficient. It is a titanium-stabilized grade, which helps prevent intergranular corrosion and improves its weldability and formability. Unlike austenitic stainless steels (such as 304 or 316), 409 is magnetic and has good thermal conductivity, making it suitable for high-temperature applications. It is widely used in automotive and industrial sectors due to its balance of affordability, durability, and resistance to oxidation at elevated temperatures. While it does not offer the same level of corrosion resistance as austenitic grades, it performs well in dry or mildly corrosive environments and is easy to fabricate through welding, bending, and forming processes.

Chemical Composition (wt%)

C ≤ 0.08, Cr: 10.50-11.75, Mn ≤ 1.00, Si ≤ 1.00, P ≤ 0.045, S ≤ 0.030, Ti: 6×C-0.70, Ni ≤ 0.50

Mechanical Properties

Tensile Strength ≥ 415 MPa, Yield Strength ≥ 205 MPa, Elongation ≥ 20%, Hardness ≤ 183 HB

Advantages

Cost-effective compared to austenitic stainless steels; good high-temperature oxidation resistance; excellent weldability and formability; magnetic; easy to machine; titanium-stabilized to prevent intergranular corrosion; suitable for mass production.

Applications

Automotive exhaust systems, catalytic converters, mufflers, heat shields, industrial ductwork, furnace parts, agricultural equipment, and general-purpose components in mild corrosive environments.

Equivalent Grades

AISI 409, UNS S40900, EN 1.4512, GB 022Cr11Ti

 

Stainless Steel Suppliers

If you have project requirements for stainless steel, we welcome your order. GNEE has a large inventory of popular products for you to choose from. It can be processed into various practical product forms, including plates, coils, tubes, bars, wires, etc. For detailed chemical composition information and free samples, please contact our factory immediately. We offer competitive prices and excellent service.Email: info@gneestainless.com

 

Testing and Documentation: Factory test certificate, EN 10204 3.1, chemical report, mechanical report, destructive testing report, non-destructive testing report, PMI test report, visual inspection report, third-party inspection report, NABL certified laboratory report.
Packaging: Wooden crate packaging, bubble wrap packaging, steel strapping, or packaging according to customer requirements.