We are Riddhi Siddhi Impex, a Mumbai-based Stainless Steel 441 Sheets & Plates supplier and stockist, established in 2002. We stock dual-stabilised ferritic flat products to ASTM A240 / ASME SA-240, in sheet gauges from 3.8 mm and widths to 2000 mm. Our ISO 9001, 14001, and 45001 certified company holds a supply capacity of 400 to 500 tons monthly, with EN 10204 Type 3.1 / 3.2 certificates on request.
Stainless Steel 441 sheets and plates are flat-rolled ferritic grade built around 17.50 to 19.50% chromium and stabilised with both titanium and niobium. Mills developed it for automotive exhaust hot-ends, and thin sheet in that service resists scaling to roughly 950 °C. Because the two stabilisers lock up carbon and nitrogen, welded joints keep their corrosion resistance without post-weld treatment. The grade is ferromagnetic, does not harden by heat treatment, and ships annealed.
Riddhi Siddhi Impex holds Type 441 sheets and plates as ready inventory, sourced from reputed primary mills. Cold-rolled 2B and bright annealed sheet starts at 3.8 mm, hot-rolled pickled material covers heavier gauges, and every consignment carries mill test certification upon request.
We provide ASTM A240 Type 441 sheets and plates in annealed mill condition, with five surface finishes and three edge options, cut from ready stock to the sizes below.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA-240, ASTM A480 |
| Thickness | Sheets 3.8 mm and above; plates as per requirement |
| Width | 3 mm to 2000 mm (custom slit widths from 3 mm, ±0.1 mm) |
| Length | Standard mill lengths; custom lengths available |
| Condition | Annealed (standard mill) |
| Surface Finish | No. 1 (HR Pickled), 2B, BA (Bright Annealed), Matte, Scotch-Brite |
| Edge | Mill edge, Slit edge, Deburred edge |
| Form | Hot-rolled plate, Cold-rolled sheet |
Niobium separates this grade from single-stabilised ferritics. Alongside titanium, it binds carbon and nitrogen, then strengthens the ferrite at exhaust temperatures. Full ASTM A240 limits for UNS S44100 appear below.
| Element | Composition (% by weight) |
|---|---|
| Carbon (C) | 0.030 max |
| Manganese (Mn) | 1.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.040 max |
| Sulphur (S) | 0.030 max |
| Chromium (Cr) | 17.50 to 19.50 |
| Nickel (Ni) | 1.00 max |
| Nitrogen (N) | 0.030 max |
| Titanium (Ti) + Niobium (Nb) | 0.10 to 1.00 |
| Iron (Fe) | Balance |
Thermal fatigue resistance drives most SS 441 plate orders, yet annealed sheet still forms well. A 415 MPa minimum tensile strength pairs with 20% elongation, so blanks fold and deep-draw without cracking. Grade 441 carries no cold-work temper ladder.
| Property | Value (Annealed) |
|---|---|
|
Tensile Strength, minimum
|
415 MPa (60 ksi) |
|
Yield Strength (0.2% offset), minimum
|
241 MPa (35 ksi) |
|
Elongation in 50 mm, minimum
|
20% |
|
Hardness, Rockwell B, maximum
|
90 HRB |
|
Hardness, Brinell, maximum
|
190 HBW |
Buyers ordering UNS S44100 plate or EN 1.4509 sheet under a regional code can match designations here. No direct JIS equivalent exists, so we cross-check Japanese inquiries case by case.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | S44100 |
| Europe (EN) | X2CrTiNb18 |
| Germany (W.Nr) | 1.4509 |
These 4 industries specify most of the Ferritic Stainless Steel 441 Sheets we dispatch from Mumbai. Each one trades on heat resistance, weldability, and a price below nickel-bearing austenitics.
Exhaust fabricators form SS 441 sheet into manifolds, downpipes, catalytic converter shells, and silencer bodies. The hot end of an exhaust line cycles past 900 °C every drive. Niobium slows thermal fatigue cracking, and the low ferritic expansion rate keeps welded joints from distorting.
Recuperators, plate heat exchangers, and flue-gas ducting use 441 stainless steel sheets where hot gas meets thin walls. A ferritic structure expands less than austenitic grades, which holds brazed and welded joints tight through repeated firing. Burner components draw on the same scaling resistance.
Catering equipment builders choose Type 441 sheet for grill housings, hob surrounds, and oven cavities. Heat sits on these parts daily. Dual stabilisation stops weld seams sensitising during fabrication, so joints stay corrosion resistant straight off the bench, and the 2B face wipes clean.
Fabricators specify SS441 sheets for cladding details, decorative trim, and enclosures in mild indoor environments. The grade costs less than 304 because it carries no deliberate nickel, yet it welds far more cleanly than plain 430, so folded panels keep their finish along seams and corners.
Sheet and plate orders were issued from Mumbai and Taloja within days, packed for sea freight.
| Parameter | Details |
|---|---|
| Packaging | Wooden cases, pallet packing |
| Incoterms | FOB, CIF, CFR, EXW Mumbai |
| Dispatch Points | Mumbai and Taloja warehouses |
| Standard Lead Time | 4 to 5 days |
| Urgent Dispatch | 2 to 3 days |
| Payment Terms | Advance, credit, LC |
| Certification | EN 10204 Type 3.1 / 3.2 on request |
Stainless Steel 441 Sheets & Plates price in India runs around ₹140 to ₹230 per kg, roughly $1.50 to $2.40 per kg for export buyers. The band is indicative; ferro-chrome rates, thickness, finish, and order volume all move it. Call or WhatsApp us for today's figure.
SS 441 carries titanium plus niobium stabilisation that SS 430 lacks. Those additions give 441 sheets cleaner welds, resistance to intergranular attack at the weld line, and longer thermal fatigue life in exhaust-type service.
We stock SS 441 sheets from 3.8 mm and above thick and plates to requirement, in widths 3 mm to 2000 mm. Custom slit widths from 3 mm hold a ±0.1 mm tolerance.
SS 441 sheet prices sit near ₹140 to ₹230 per kg in India, about $1.50 to $2.40 internationally. Gauge, finish, and quantity set the exact rate, so send your size list for a firm quote.
You can source ASTM A240 Type 441 sheets and plates from us at Riddhi Siddhi Impex. Our Mumbai and Taloja warehouses hold stock ready for dispatch, serving buyers across India and overseas, and quotes will be provided within 24 hours.
