We are Riddhi Siddhi Impex, a Mumbai-based Stainless Steel 441 Strips manufacturer and supplier, established in 2002. We slit UNS S44100 strip to ASTM A240 / ASME SA-240 in widths from 3 mm to 2000 mm, held within ±0.1 mm. With ISO 9001, 14001, and 45001 certifications, we keep a ready stock in Mumbai. We also provide EN 10204 Type 3.1 / 3.2 certificates on request.
Stainless Steel 441 strip is a ferritic grade built on 17.5 to 19.5% chromium and stabilised twice over with titanium and niobium. That pairing stops chromium carbides from forming at grain boundaries during welding and holds strength as exhaust gas cycles toward 950 °C. The steel is ferromagnetic, has a density of 7.7 g/cm³, and won't harden by heat treatment. Mills developed it for automotive exhaust hot ends and heat-exchange duty.
As a stainless steel 441 strip supplier, we slit every coil in-house rather than reselling mill widths. Strip leaves annealed to ASTM A240 in gauges from 0.03 mm to 5 mm, with five surface finishes and four edge conditions. Test records stay with each batch from the source coil to final dispatch.
We provide ASTM A240 Type 441 strips annealed and soft, finished to any of five surfaces, edge-conditioned four ways, and slit to the width your press line runs.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA-240, ASTM A480 |
| Thickness | 0.03 mm to 5 mm |
| Width | 3 mm to 2000 mm |
| Width Tolerance | ±0.1 mm |
| Condition | Annealed (Soft) |
| Surface Finish | BA (Bright Annealed), 2B, Scotch-Brite, Matte, Matte PVC |
| Edge | Slit edge, Mill edge, Deburred edge, Round edge |
Niobium sets 441 stainless steel apart from single-stabilised ferritics. Alongside titanium, it locks up carbon and nitrogen before either can pull chromium away from grain boundaries.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.030 max |
| Manganese (Mn) | 1.00 max |
| Phosphorus (P) | 0.040 max |
| Sulphur (S) | 0.030 max |
| Silicon (Si) | 1.00 max |
| Chromium (Cr) | 17.5 to 19.5 |
| Nickel (Ni) | 1.00 max |
| Nitrogen (N) | 0.030 max |
| Iron (Fe) | Balance |
Annealed AISI 441 strip delivers 414 MPa minimum tensile strength with 20% elongation, so cones and tube blanks form without cracking.
| Property | Value |
|---|---|
|
Tensile Strength, minimum
|
414 MPa (60 ksi) |
|
Yield Strength (0.2% offset), minimum
|
241 MPa (35 ksi) |
|
Elongation in 50 mm, minimum
|
20% |
|
Hardness (Brinell), maximum
|
190 HBW |
|
Hardness (Rockwell B), maximum
|
90 HRB |
Buyers matching a specification can cross-reference the 441 stainless steel strips below. ASTM A240 anchors the grade as Type 441, UNS S44100.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | S44100 |
| USA (AISI) | 441 |
| Europe (EN) | X2CrTiNb18 |
| Germany (W.Nr) | 1.4509 |
4 industries commonly utilise stainless steel 441 winding strips that we slit. Each trades the nickel premium of austenitic grades for a stabilised ferritic that holds shape through thermal cycling.
Exhaust fabricators use AISI 441 strip in hot-end cones, downpipes, flexible connector interlocks, and welded tubes. Close to the manifold, gas temperatures cycle past what 409 tolerates. Scaling resistance to roughly 950 °C plus niobium-backed creep strength keeps welded joints tight through years of heat-up and cool-down.
Heat exchanger builders press SS 441 strip into fins and plates because ferritic steel conducts heat better and expands less than austenitic sections. Lower expansion cuts stress at brazed joints. Boiler cladding and flue components draw on the same slit coil, fed straight into forming presses at ±0.1 mm.
Appliance plants draw 441 stainless steel strips into oven liners, grill housings, sink bowls, and dishwasher panels. The grade forms cleanly in annealed condition and takes a bright BA or Scotch-Brite surface that survives household detergents. Costing runs below 304 because the grade carries no deliberate nickel.
Fabricators of cladding, lift trim, and interior panelling pick Type 441 stainless steel strips where a stainless finish must meet a fixed budget. Appearance stays uniform batch to batch. Dual stabilisation lets installers weld trim sections on site without the grain-boundary attack that troubles unstabilised 430 material.
Despatches move from Taloja and Mumbai in wooden cases or on pallets, with export papers prepared in-house.
| 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 Strips price in India is around ₹80-₹140 per kg, approximately $0.10-$0.14 for export buyers. Ferrochrome and stabiliser surcharges move the figure, alongside thickness, width, finish, and volume. Send your gauge and slit width over WhatsApp for a confirmed rate.
SS 441 strips are available from 0.03 mm to 5 mm thick, slit to any width between 3 mm and 2000 mm. Width tolerance holds at ±0.1 mm.
SS 441 strips can be welded without post-weld heat treatment. Titanium and niobium tie up carbon, so the heat-affected zone resists intergranular attack.
SS 441 differs from SS 439 strip in its niobium addition. SS 439 relies on titanium alone, while the extra niobium in 441 lifts creep strength and high-temperature performance for exhaust hot ends.
441 stainless steel slit coil resist scaling to roughly 950 °C in cyclic, exhaust-type service. Beyond that, the oxide scale spalls faster than chromium can rebuild it.
You can source custom-width Stainless Steel 441 Strips from Riddhi Siddhi Impex in Mumbai. We slit to size, dispatch in 4 to 5 days, and send quotes within 24 hours over the phone or WhatsApp.
