We are Riddhi Siddhi Impex, a Mumbai-based Stainless Steel 441 Coils supplier and stockist, established in 2002. We stock this dual-stabilised ferritic grade to ASTM A240 / ASME SA-240, in 0.03 mm to 5 mm thickness and widths up to 2000 mm. Our ISO 9001, 14001, and 45001 certified company holds a monthly supply capacity of 400 to 500 tonnes, with EN 10204 Type 3.1 / 3.2 mill test certificates on request.
Stainless Steel 441 is a ferritic grade holding 17.50 to 19.50% chromium, stabilised twice over with titanium and niobium together. The two elements lock up carbon and nitrogen, so welded joints keep their corrosion resistance, and the steel holds strength through repeated heating. Scaling resistance in cyclic exhaust-type service reaches roughly 950 °C. The alloy carries no deliberate nickel, stays ferromagnetic, and doesn't respond to hardening heat treatment, so mills deliver it annealed. These stainless steel coils are used in automotive exhaust systems and heat exchangers.
As a reliable 441 Stainless Steel Coil supplier, we hold coil inventory sourced from reputed primary mills and slits it to any width between 3 mm and 2000 mm. Cold-rolled material covers thin gauges down to 0.03 mm, while hot-rolled pickled coil handles the heavier end up to 5 mm. The product is within our wider stainless steel coils range.
We provide ASTM A240 Type 441 coils in the annealed mill condition, with five surface finishes and four edge choices, slit from ready stock to the dimensions tabulated below.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA-240 |
| Thickness | 0.03 mm to 5 mm |
| Width | 3 mm to 2000 mm (custom slit, ±0.1 mm) |
| Coil Inner Diameter | 150 mm to 610 mm |
| Coil Outer Diameter | Up to 1800 mm |
| Condition | Annealed (standard mill) |
| Surface Finish | 2B, BA (Bright Annealed), Matte, Matte PVC, Skin Pass |
| Edge | Slit edge, Mill edge, Deburred edge, Round edge |
Dual stabilisation defines this chemistry. Titanium and niobium bind carbon before it can form chromium carbides at weld grain boundaries. The 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) | 0.10 to 0.50 |
| Niobium (Nb) | Nb: 0.30 + 9×C min, 0.90 max |
| Iron (Fe) | Balance |
Formability decides most 441 coil orders. Annealed material combines a 415 MPa minimum tensile strength with 20% elongation, so blanks press and deep-draw cleanly. Grade 441 is not a hardness grade, so coils ship annealed only.
| Property | Value (Annealed) |
|---|---|
|
Tensile Strength, minimum
|
414 MPa (60 ksi) |
|
Yield Strength (0.2% offset), minimum
|
241 MPa (35 ksi) |
|
Elongation in 50 mm, minimum
|
20% |
Buyers ordering 1.4509 coils or X2CrTiNb18 material can match the designations below. Some suppliers quote SUS 441, though Japanese standards define no direct 441 equivalent.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | S44100 |
| Europe (EN) | X2CrTiNb18 |
| Germany (W.Nr) | 1.4509 |
These 4 industries use most of the 441 stainless steel coils we stock. Each one buys the grade for weldability, cyclic oxidation resistance, and a nickel-free price that stays steadier than austenitic alternatives.
Exhaust fabricators use SS 441 coils in manifolds, downpipes, catalytic converter shells, and silencer bodies. Dual titanium-niobium stabilisation preserves weld-zone corrosion resistance through assembly, while niobium adds the creep strength hot-end components demand. In cyclic running, the grade withstands scaling to about 950 °C.
Appliance makers press 441 stainless steel coil into oven cavities, hob trims, range hoods, and washing machine drums. The ferritic structure draws well in 2B or bright annealed finish, and freedom from nickel keeps part costs predictable when nickel markets swing. Magnetic response suits induction cookware bases.
Facade contractors specify AISI 441 stainless steel coils for standing-seam roofing, rainscreen panels, and column covers. Long welded seams stay bright because the stabilising elements stop sensitisation in the heat-affected zone. Thermal expansion runs about two-thirds that of austenitic sheet, so wide panels distort less.
Heat exchanger builders roll UNS S44100 coils into recuperator plates, flue-gas ducting, and burner components. Oxidation resistance holds through repeated thermal cycling, where plain 430 scales earlier. Prolonged exposure between 400 and 500 °C invites alpha-prime embrittlement, so designers keep continuous duty outside that band.
Export and domestic coil orders are dispatched from Mumbai and Taloja, 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 Coils price in India is approximately ₹123-₹180 per kg, about $1.3-$1.9 per kg for export enquiries. Ferrochrome rates, thickness, width, finish, and quantity move the figure; volume discounts apply to bulk lots. WhatsApp or call us for the current rate.
Stainless steel coil 441 is a dual-stabilised ferritic coil holding 17.50 to 19.50% chromium with titanium and niobium additions, supplied to ASTM A240 under UNS S44100. It welds cleanly and resists cyclic oxidation to roughly 950 °C.
The difference between SS 441 and SS 439 coils lies in the stabiliser: 439 relies on titanium alone, while 441 adds 0.30 to 1.00% niobium. That addition raises high-temperature strength and creep resistance, so 441 suits exhaust hot-ends where 439 serves cooler sections.
SS 441 coils beat SS 304 on price stability and stress corrosion cracking resistance because the grade contains no nickel. SS 304 keeps the advantage in wet, chloride-rich service.
We supply SS 441 coils in 2B, BA (Bright Annealed), Matte, Matte PVC, and Skin Pass finishes, with slit, mill, deburred, or round edges.
You can source Stainless Steel 441 coils from us at Riddhi Siddhi Impex. Ready stock is kept in our Mumbai and Taloja warehouses for dispatch across India and export worldwide. Receive a quote within 24 hours by phone or WhatsApp.
