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Material Type: Iron-Chromium Alloy (Nickel-Free or Low-Nickel)
Structure: Body-Centered Cubic (BCC)
Working Temperature: -60°C to +1100°C (depending on grade)
Form: Sheet, coil, plate, pipe, rod, and strip
Origin: China
Transport Package: Standard Export Package
Ferritic Stainless Steels are iron-chromium alloys characterized by excellent corrosion resistance, high thermal conductivity, and superior stress corrosion cracking resistance. With a body-centered cubic (BCC) structure, they contain little or no nickel, offering an economical alternative to austenitic stainless steels while maintaining reliable performance in moderate to aggressive environments.
Outstanding Corrosion Resistance: Excellent resistance to stress corrosion cracking and oxidation, especially in chloride and acidic environments.
High Thermal Conductivity: Better heat transfer properties than austenitic grades.
Magnetic Properties: Naturally magnetic due to their ferritic crystal structure.
Good Formability and Ductility: Easy to process, weld, and form into complex shapes.
Low Thermal Expansion: Provides dimensional stability under temperature fluctuations.
| Grade | UNS No. | Cr (%) | C (%) max | Notable Characteristics |
|---|---|---|---|---|
| 409 | S40900 | 10.5–11.75 | 0.08 | Economical, used in automotive exhaust systems. |
| 430 | S43000 | 16–18 | 0.12 | Good corrosion resistance, decorative applications. |
| 439 | S43035 | 17–19 | 0.03 | Stabilized with Ti, improved weldability. |
| 446 | S44600 | 23–27 | 0.20 | Excellent scaling resistance up to 1100°C. |
Tensile Strength: 380–620 MPa
Yield Strength (0.2% Offset): 205–450 MPa
Elongation: 20–35%
Hardness: ≤90 HRB
Density: 7.70 g/cm³
Automotive Industry: Exhaust systems, catalytic converter housings, and mufflers.
Appliances & Architecture: Decorative panels, sinks, interior trim, kitchen equipment.
Heat Exchangers & Boilers: Due to high thermal conductivity and oxidation resistance.
Industrial Equipment: Chemical processing, heaters, and furnace components.
Cost-effective alternative to nickel-containing steels.
Stable mechanical performance at high temperatures.
Excellent oxidation resistance and magnetic behavior.
Suitable for both industrial and decorative use.
Ferritic Stainless Steels offer an ideal balance between cost, corrosion resistance, and thermal stability. Their nickel-free composition and magnetic nature make them suitable for automotive, appliance, and industrial applications that demand reliable performance and longevity in challenging environments.
