Stainless Steel 409 Sheets, Plates, Coils

Stainless Inox supplies, exports, and stocks 409 stainless steel sheets, plates, and coils from its Dubai base, serving buyers across the UAE and export markets. Grade 409, listed under UNS S40900 and DIN 1.4512, is a ferritic, titanium-stabilized stainless steel carrying around 11% chromium, the minimum level needed to hold a stable passive layer. Automotive exhaust systems account for most of its use, though the same stainless steel sheets turn up in mufflers, catalytic converter housings, and heat shields. Formability stays reasonable at this chromium level, and cost sits below higher-nickel grades. That combination is why fabricators pick 409 when mechanical performance matters more than surface appearance.

Stainless Steel 409 Coils

Stainless Steel 409 Sheets

Stainless Steel 409 Plates

What are 409 Stainless Steel Sheets & Plates?

409 sheets and plates fall under the ferritic family, so the microstructure stays largely magnetic and doesn't harden through heat treatment the way martensitic grades do. Titanium stabilizes the carbon content, which stops chromium carbide precipitation at weld lines and keeps corrosion resistance intact after fabrication. Sheets arrive cold rolled in thinner gauges, plates cover the heavier stock, and both follow ASTM A240 limits for chemistry and mechanical properties. Chromium content sits near the lower edge of what qualifies as stainless steel, so this grade suits mild atmospheric and exhaust-gas exposure rather than aggressive chemical environments.

Features & Advantages of Stainless Steel 409

Elevated temperature resistance is where 409 earns its keep, holding up under the heat cycling that exhaust components go through daily. Formability remains workable for bending, stamping, and roll forming without frequent cracking. Weldability holds up too; titanium stabilization keeps the heat-affected zone from losing corrosion resistance after welding. Strength is classified as medium range, adequate for structural brackets and housings without the added weight of thicker alternatives. Material cost stays lower than austenitic grades like 304. Availability across sheet, plate, and coil forms adds flexibility for different fabrication processes.

409 Stainless Steel Sheets, Vs. Plates, Vs. Coils

The main differences between sheets, plates, and coils are their thickness, form, and how they are processed downstream. The table below sets out the practical differences.

Feature	Sheets	Plates	Coils
Form	Flat, cut-to-size material	Thicker flat stock for heavy-duty use	Continuous rolled strip supplied in coil form
Typical Thickness	0.3 mm to 6 mm, cold-rolled	3 mm to 20 mm or more	0.3 mm to 10-12 mm depending on mill supply
Main Use	Formed parts, panels, covers, light fabrication	Structural parts, heavy fabrication, large components	Slitting, stamping, automated production, long-run fabrication
Finish Options	2B, 2D, BA, satin, and other rolled finishes	Hot-rolled or processed finishes for heavier service	Cold-rolled, hot-rolled, passivated, or polished coil finishes
Standards	ASTM A240 / ASME SA240	ASTM A240 / ASME SA240	ASTM A240 / ASME SA240

Stainless Steel 409 Sheets, Plates & Coils Specification :

Standard	:	ASTM A240 / ASME SA240
Range	:	5mm To 150mm
Width	:	1000mm / 1219mm /1250mm / 1500mm / 2000mm
Length	:	2000 mm / 2440 mm / 2500 mm / 3000 mm / 6000 mm.
Thickness of Coils	:	Ranging from 0.3mm to 10mm
Thickness of Sheets (Cold Rolled)	:	Ranging from 0.3 mm to 6 mm
Thickness of Sheets / Plates (Hot Rolled)	:	Ranging from 3.0 mm to 20 mm
Hardness	:	As per ASME A & NACE MR 175
Finish	:	Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated)
Form	:	Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Blank (Circle), Ring (Flange) etc.

Types Of Stainless Steel 409 Sheets, Plates & Coils :

>  Stainless Steel 409 Sheets
>  Stainless Steel 409 Coils
>  AISI Stainless Steel 409 Sheets
>  ASTM A240 SS 409 Sheets
>  Stainless Steel 409 UNS S40900 Plates
>  Stainless Steel 409 Chequered Plate
>  Stainless Steel 409 Shim Sheet

>  Stainless Steel 409 Plates
>  SS 409 Sheets
>  SS 409 Plates
>  ASME SA 240 Stainless Steel 409 Plates
>  SS 409 Din Sheets
>  Stainless Steel 409 Perforated Sheet
>  Stainless Steel 409 Foils

Origin of Material

Stainless Steel 409 Columbus Stainless Sheets

Stainless Steel DIN 1.4512 Aperam Plates

FAQ

Is 409 stainless steel suitable for high-temperature applications?
Yes. It can withstand continuous high temperatures up to around 675°C without excessive scaling, which covers most exhaust and heat-shield uses. Past that range, oxidation resistance drops and higher-chromium grades perform better.

Can 409 stainless steel sheets be welded easily?
Standard TIG and MIG processes work fine on the 409 sheet. Titanium stabilization keeps the weld zone from losing corrosion resistance, and preheating isn't usually needed at typical sheet gauges.

What finishes are available for 409 stainless steel sheets?
The sheets are available in 2B, 2D, BA, and satin finishes. 2B covers most exhaust and structural parts where surface appearance isn't the main requirement.

Can 409 stainless steel plates be supplied in custom sizes?
Yes. Plates are designed as per the project drawings, covering standard mill dimensions as well as custom lengths and widths on request.

How does 409 stainless steel compare with 410 stainless steel?
409 is a ferritic stainless steel and will not harden with heat treatment. 410 stainless steel is martensitic and will harden with heat treatment. 409 costs less and welds with fewer precautions; 410 has higher strength and hardness.