Grade 409 Stainless Steel – Cost-Effective Ferritic Corrosion-Resistant Alloy

Overview

Grade 409 is a ferritic stainless steel renowned for its excellent cost-performance ratio, primarily designed for applications requiring moderate corrosion resistance and good formability. It is characterized by a low chromium content (10.5-11.75%) and titanium stabilization, which enhances its resistance to intergranular corrosion and improves weldability. Unlike austenitic stainless steels, Grade 409 is magnetic and offers good thermal conductivity, making it suitable for high-temperature exhaust systems and general industrial applications where cost is a key consideration. It balances basic corrosion protection with affordability, serving as a reliable choice for non-critical corrosive environments.

Chemical Composition (wt%)

C ≤ 0.08, Cr: 10.50-11.75, Ti: 0.15-0.35, Mn ≤ 1.00, Si ≤ 1.00, P ≤ 0.045, S ≤ 0.030, Ni ≤ 0.50

Typical Mechanical Properties (Annealed Condition)

Tensile Strength (Rm): ≥ 415 MPa; Yield Strength (Rp0.2): ≥ 205 MPa; Elongation (A): ≥ 20%; Brinell Hardness (HB): ≤ 183

Core Advantages

Cost-effective with moderate corrosion resistance; titanium-stabilized to prevent intergranular corrosion; good formability and weldability; magnetic with excellent thermal conductivity; suitable for high-temperature service up to 650°C; low nickel content reduces material cost.

Applications

Automotive exhaust systems, catalytic converters, heat exchangers, furnace parts, architectural trim, and general industrial components in mild corrosive environments.

Equivalent Grades

EN 1.4512, UNS S40900, GB 022Cr11Ti, SUS409L

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.