We are Riddhi Siddhi Impex, a Mumbai-based Stainless Steel 304L Foils manufacturer and supplier, established in 2002. We slit low-carbon austenitic foil to ASTM A240 / ASME SA-240 in thicknesses from 0.03 mm to 0.08 mm. As an ISO 9001, 14001, and 45001-certified company, we hold ready stock backed by a monthly supply capacity of 400-500 tonnes, with EN 10204 Type 3.1 / 3.2 mill test certificates on request.
Stainless Steel 304L foils are thin, flat-rolled sections of the low-carbon 18-8 austenitic grade. Carbon is at 0.030% maximum against 0.08% for standard 304, so welds carry no grain-boundary carbide and the metal resists intergranular attack across the 425 to 850 °C sensitisation range. Chromium at 17.5 to 19.5% builds the passive film; nickel keeps the structure ductile. These Stainless Steel Foils are widely specified in food processing units, pharmaceuticals, and automotive industries.
As a reliable Stainless steel 304L foil supplier and manufacturer, every foil we dispatch comes off our own slitting lines. Material leaves annealed to ASTM A240, cut to any width between 3 mm and 2000 mm, and our inspectors trace each coil from intake to packing.
We provide ASTM A240 Type 304L foil in annealed soft condition, with five surface finishes and four edge choices.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA-240, AMS 5511 |
| Thickness | 0.03 mm to 0.08 mm |
| Width | 3 mm to 2000 mm |
| Width Tolerance | ±0.1 mm |
| Condition | Annealed (Soft) |
| Supply Forms | Cold rolled |
| Surface Finish | BA (Bright Annealed), 2B, Matte, Matte PVC, Scotch-Brite |
| Edge | Slit edge, Mill edge, Deburred edge, Round edge |
Carbon defines this grade. Capping it at 0.030% starves grain boundaries of carbide, leaving the 17.5 to 19.5% chromium in solution where it resists corrosion.
| Element | Composition (% by weight) |
|---|---|
| Carbon (C) | 0.030 max |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.045 max |
| Sulphur (S) | 0.030 max |
| Silicon (Si) | 0.75 max |
| Chromium (Cr) | 17.5 to 19.5 |
| Nickel (Ni) | 8.0 to 12.0 |
| Nitrogen (N) | 0.10 max |
| Iron (Fe) | Balance |
Annealed 304L stainless foil reaches 485 MPa minimum tensile strength with 40% elongation, ductility to spare for drawing and pressing. We supply soft condition only; below 0.38 mm gauge, the minimums are indicative, not guaranteed to ASTM A240.
| Property | Value (Annealed) |
|---|---|
|
Tensile Strength, minimum
|
485 MPa (70 ksi) |
|
Yield Strength (0.2% offset), minimum
|
170 MPa (25 ksi) |
|
Elongation in 50 mm, minimum
|
40% |
|
Hardness, maximum
|
201 HBW / 92 HRB |
Buyers ordering UNS S30403 foil against a regional code can cross-check the table below. Each AISI 304L foil we slit answers every designation listed.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | S30403 |
| Europe (EN) | X2CrNi18-9 |
| Germany (W.Nr) | 1.4307 |
| Japan (JIS) | SUS304L |
| China (GB) | 022Cr19Ni10 |
| Russia (GOST) | 03Х18Н11 |
These 5 industries use the SS 304L foil we slit. Buyers pick the grade for weld-zone corrosion resistance, hygienic surfaces, and clean thin-gauge forming.
Dairies and food plants wrap tanks, line contact surfaces, and seal joints with SS 304L foil because it tolerates brines, acidic products, and daily washdown chemistry. Welded seams hold their corrosion resistance through years of cleaning cycles.
Pharma builders use Type 304L foil in clean-room barriers, instrument diaphragms, and sterile packaging lines. Repeated steam sterilisation leaves the passive surface intact, and brazed or welded device seams never open a path for intergranular corrosion.
Engine gaskets, piston rings, bellows, and precision shims start life as Alloy 304L foil slit to ±0.1 mm. The soft annealed condition folds around complex profiles without tearing, and joints keep their integrity under spot or seam welding.
Chemical plants order 304L foil for tank liners, moisture barriers, and vessel linings in oxidising service. Fabricators weld the thin material straight onto steel shells, and low carbon keeps the joints free of grain-boundary attack that shortens standard 304 linings.
Electronics makers stamp heat shields, filters, camera parts, and fibre optic components from 304L SS foil. Tight thickness control supports etching and fine blanking, and the annealed structure stays essentially non-magnetic around sensitive assemblies.
Orders leave Mumbai and Taloja packed for sea, with documents completed before dispatch.
| 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 mill test certificates on request |
The price range of Stainless Steel 304L Foils in India is around ₹250-₹400 per kg. For export buyers, it is generally $2 -3.5 per kg. Nickel market rates move the figure, along with gauge, slit width, finish, and order quantity. Volume discounts apply, so call or WhatsApp us for the current rate.
We slit Stainless Steel 304L foil from 0.03 mm to 0.08 mm thick and to any width between 3 mm and 2000 mm, held to ±0.1 mm. Heavier flat products fall under our Stainless Steel 304L Coils range.
The difference between 304 and 304L foils depends on carbon. 304L caps carbon at 0.030% against 0.08% for standard 304, so it resists intergranular corrosion after welding, making it the safer pick for welded or brazed foil work.
Yes, Stainless Steel AISI 304L foils weld cleanly by TIG, spot, and seam methods without post-weld annealing. The 0.030% carbon ceiling blocks carbide precipitation in the heat-affected zone, so fabricators trust the grade for welded thin-gauge assemblies.
Available finishes for SS 304L foils include BA (Bright Annealed), 2B, Matte, Matte PVC, and Scotch-Brite. We supply cold-rolled material with slit, mill, deburred, or round edges.
No, Stainless Steel 304L foil is supplied in the annealed soft condition only. The low-carbon grade is not stocked in quarter-hard to spring hard tempers; buyers needing temper-rolled foil should see our Stainless Steel 304 Foils page.
You can source Stainless Steel 304L Foils in India from us at Riddhi Siddhi Impex. Our Mumbai warehouse holds UNS S30403 foil for dispatch in 4 to 5 days, or 2 to 3 days on urgent orders. We serve buyers across India and overseas. Phone or WhatsApp us and get a quote within 24 hours.
