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Stainless Steel 409 Sheet and Plates are titanium-stabilized ferritic stainless steels that provide superior oxidation resistance and formability, particularly in automotive and exhaust systems. Andre Stainless Singapore offers SS 409 in cut-to-size sizes suited for OEM and industrial applications. Withstanding high-temperature exposure as well as corrosive gases, SS 409 offers good corrosion performance under mild conditions and retains strength following thermal cycling. It is magnetic and easily weldable, making it easy to fabricate into complex shapes. With an effective combination of cost, performance, and heat resistance, SS 409 is a top selection for exhaust, thermal, and heating systems globally.
SS 409 includes 10.5–11.7% chromium, ≤0.08% carbon, ≤1.0% manganese, and additions of titanium (at 6 times the carbon level). Ferritic type SS 409 offers tensile strength of about 380–450 MPa, yield strength 170–250 MPa, and elongation up to 25%. It provides good oxidation resistance up to 675°C. Its titanium stabilization avoids sensitization and weld decay. The alloy is magnetic in all conditions and has fair corrosion resistance in mild atmospheres. It maintains dimensional stability under heat stress and is ideally suited for use in applications where cosmetic appearance is of lesser priority to durability, thermal endurance, and fabrication efficiency.
Specifications< ASTM A240 / ASME SA240
Size : 1/4″ to 4″
Range : 5mm To 150mm
Thickness : 4.0mm – 100mm
Hardness : Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc.
Finish : Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated)
Form : Plain Sheet, Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Blank (Circle), Ring (Flange)
| Element | Content |
|---|---|
| Carbon | 0.08 maximum |
| Manganese | 1.00 maximum |
| Phosphorus, maximum | 0.045 maximum |
| Sulfur, maximum | 0.045 maximum |
| Silicon | 1.00 maximum |
| Nickel | 0.5 |
| Chromium | 11.75 |
| Molybdenum | – |
| Grade | C | Ni | Si | N | S | Mn | P | Cr | Ti |
|---|---|---|---|---|---|---|---|---|---|
| SS 409 | 0.030 max | 0.5 max | 1 max | – | 0.020 max | 1 max | 0.040 max | 10.5 – 11.7 | 6*(%C+%N |
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Stainless Steel 409 Hot Rolled Sheet and Plates provide good oxidation resistance and strength. These are applied in automotive exhaust systems, heat exchangers, and many more high-temperature applications that require durability.
Stainless Steel 409 Cold Rolled Sheet and Plates are available with a smooth, precise finish, which provides enhanced mechanical properties, applied in automobile parts, industrial applications, and structural components that require a clean, flat surface.
Stainless Steel 409 Chequered Sheet and Plates are applied where slip resistance and durability is required, including flooring and stair treads. It combines the strength with the corrosion resistance so it can be applied in either industrial or commercial applications.
Stainless Steel 409 Perforated Sheet and Plates are used in filtration, ventilation, and aesthetic applications. They are strong and resistant to corrosion, with functional perforations that allow for the design of various custom and structural applications in high-temperature conditions.
Stainless Steel 409 Shim Sheet and Plates can ensure the accuracy and rigidity to the machinery and structural parts. Owing to its properties of resistance to high temperature and corrosion, it is widely used in automobile and industrial applications where such accurate distance and alignment are a must.
The stainless steel 409 polished sheet and plates feature a bright, shiny surface suitable for decorative and architectural purposes. They exhibit good resistance to oxidation and corrosion and can be used for aesthetic as well as functional purposes in any environment.
SS 409 Plates and Sheets are used widely in exhaust systems of vehicles, silencers, catalytic converters, and tailpipes. It is also applied in muffler internals, industrial HVAC systems, and ducting. In construction and agriculture, it’s applied to trailer panels and supports. SS 409 finds application in industrial furnaces, heating chambers, and process ducts where resistance to oxidizing atmospheres is critical. In dairy equipment and food processing, it is used in non-contact thermal equipment. Due to its low-cost corrosion and oxidation resistance, SS 409 finds extensive use in long service life demanding applications, thermal performance, and manufacturability at low cost in different industries.
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