We are Riddhi Siddhi Impex, a Stainless Steel 409 Strips manufacturer and supplier operating from Mumbai since 2002. Our lines slit titanium-stabilised ferritic 409 to ASTM A240 / ASME SA-240 in thicknesses from 0.03 mm to 5 mm, holding widths to ±0.1 mm on narrow slit widths. Our ISO 9001, 14001, and 45001-certified facility keeps ready stock, with a monthly supply capacity of 400 to 500 tonnes, and issues EN 10204 Type 3.1 mill test certificates as standard, with Type 3.2 on request.
Stainless Steel 409 strips are flat-rolled products of titanium-stabilised ferritic stainless steel. Chromium content runs 10.5 to 11.7%, enough to hold a protective oxide scale in continuous service near 675°C. Titanium binds carbon and nitrogen, so heat-affected zones keep their corrosion resistance after welding. With nickel capped at 0.50%, this Stainless Steel 409 Winding Strip option costs around half the price of common austenitic grades. Exhaust fabricators consume most of this material worldwide.
We slit every 409 SS strip in-house from prime source coils on the lines that process our complete stainless steel strips range. Material leaves in the annealed condition only, since 409 is not supplied in hardened tempers. Widths run from 3 mm to 2000 mm, with six finishes on offer. EN 10204 traceability follows every strip from goods-in to dispatch.
We provide ASTM A240 Type 409 strip in the annealed condition, precision-slit to ±0.1 mm on narrow slit widths, finished in six surfaces, and supplied wound in coil from ready stock.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA-240 |
| General Requirements | ASTM A480 |
| Thickness | 0.03 mm to 5 mm |
| Width | 3 mm to 2000 mm |
| Width Tolerance | ±0.1 mm on narrow slit widths |
| Condition | Annealed (standard mill condition) |
| Surface Finish | No.1 (hot rolled, annealed, pickled), BA (Bright Annealed), 2B, Scotch-Brite, Matte, Matte PVC |
| Edge | Slit edge, Mill edge, Deburred edge, Round edge |
| Supply form | Hot-rolled, Cold-rolled |
Titanium sets this grade apart. For UNS S40910, ASTM A240 demands titanium at least six times the combined carbon and nitrogen content, which blocks carbide precipitation in welds. The table shows UNS S40910 limits.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.030 max |
| Manganese (Mn) | 1.00 max |
| Phosphorus (P) | 0.040 max |
| Sulphur (S) | 0.020 max |
| Silicon (Si) | 1.00 max |
| Chromium (Cr) | 10.5 to 11.7 |
| Nickel (Ni) | 0.50 max |
| Titanium (Ti) | 6 x (C+N) min, 0.50 max |
| Niobium (Nb) | 0.17 max |
| Nitrogen (N) | 0.030 max |
| Iron (Fe) | Balance |
Annealed 409 stainless steel slit coil delivers 380 MPa minimum tensile strength and a minimum elongation of 20%, so it presses and deep-draws, offering forming characteristics similar to carbon steel. We supply the annealed condition only.
| Property | Value |
|---|---|
|
Tensile Strength, minimum
|
380 MPa (55 ksi) |
|
Yield Strength (0.2% offset), minimum
|
170 MPa (25 ksi) |
|
Elongation in 50.8 mm (2 in.), minimum
|
20% |
|
Hardness, maximum
|
88 HRB (179 HBW) |
Overseas buyers can cross-reference UNS S40900 strips against the designations below. Current ASTM A240 editions fill an S40900 order with S40910, S40920, or S40930.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | S40900 / S40910 |
| Europe (EN) | X2CrTi12 |
| Germany (W.Nr) | 1.4512 |
| Japan (JIS) | SUH 409 |
| China (GB) | 06Cr11Ti |
| France (AFNOR) | Z3CT12 (legacy) |
| UK (BS) | 409S19 |
These are the applications that specify most of the 409 ferritic stainless steel strips we slit. Each values heat resistance and formability at the lowest alloy cost rather than polished appearance.
Exhaust system builders form UNS S40900 strips into silencer shells, catalytic converter housings, heat shields, and tailpipe assemblies. The material takes constant thermal cycling between ambient and red heat without scaling away. 409 develops light surface rust outdoors, so fabricators leave it bare where looks don't matter.
Thermal equipment makers pick AISI 409 strips for heat exchanger tube blanks, furnace liners, and domestic heating flues. Oxidation resistance near 675°C covers most combustion-side duty. Ferritic thermal expansion sits around two-thirds of the austenitic figure, cutting distortion when operating temperatures swing between firing cycles.
Farm machinery plants and general fabricators stamp SS 409 strips into grain dryer panels, silo trim, brackets, and clamp bands. The grade welds with conventional procedures, reducing fabrication costs. Where parts face fertiliser chemicals or coastal air, we steer buyers towards higher-chromium ferritic grades instead.
Orders leave our Mumbai and Taloja warehouses within 4 to 5 days, packed for sea transit.
| 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 standard; Type 3.2 on request |
409 stainless steel strip price in India is around ₹90 to ₹120 per kg for standard items, or roughly $1.05 to $1.40 per kg for foreign buyers. The rate stays well below austenitic grades and moves mainly with ferrochrome. Thickness, width, finish, and volume all affect the final price; call or WhatsApp for today's rate.
SS 409 strips come in thicknesses from 0.03 mm to 5 mm, slit to widths between 3 mm and 2000 mm. Width tolerance stays within ±0.1 mm on narrow slit widths.
The main difference between SS 409 and SS 430 strips is chromium and stabilisation. Grade 409 carries 10.5 to 11.7% chromium plus titanium to protect welds, while 430 holds 16 to 18% chromium for better corrosion resistance without a stabiliser.
Surface finishes available on 409 stainless steel strips include No.1 (hot rolled, annealed, pickled), BA, 2B, Scotch-Brite, Matte, and Matte PVC. Slit, mill, deburred, and round edges complete the options for SS409 strip buyers.
You can source Stainless Steel 409 Strips in India from us at Riddhi Siddhi Impex. Our Mumbai and Taloja warehouses hold ferritic strip stock for 4 to 5 day dispatch, serving dealers, distributors, and OEM buyers nationwide alongside exports. Phone or WhatsApp us; quotations are issued within 24 hours.
