We are Riddhi Siddhi Impex, a Mumbai-based Stainless Steel 304L Coils supplier and stockist, established in 2002. We stock ASTM A240 / ASME SA-240 Type 304L coils sourced from reputed primary mills and slit them in-house to ±0.1 mm on narrow widths. Our ISO 9001, 14001, and 45001-certified facility holds 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 304L Coils are flat-rolled lengths of low-carbon austenitic stainless steel, wound for storage and downstream processing. The grade caps carbon at 0.030%, so welded joints resist the chromium carbide precipitation that invites intergranular corrosion. Fabricators select 304L wherever post-weld annealing isn't practical. Coil is commonly processed into industrial storage tanks, exhaust ducting, dairy lines, and structural cladding panels, all of which originate as a raw stainless steel coil.
We hold UNS S30403 coils in our Mumbai and Taloja warehouses as part of a wider stainless steel coils range, sourced from reputed primary mills and slit in-house to any width from 3 mm to 2000 mm. Buyers can choose No.1, 2B, BA, Matte, Matte PVC, or Skin Pass surfaces. Every consignment leaves in the solution annealed condition with certification traceable to the parent heat.
We provide SS 304L coils to ASTM A240 / ASME SA-240 in hot rolled and cold rolled form, with six surface finishes and four edge options, slit to width from ready stock.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA-240 |
| General Requirements | ASTM A480 |
| Thickness | 0.03 mm to 5 mm |
| Width (after slitting) | 3 mm to 2000 mm |
| Width Tolerance | ±0.1 mm on narrow slit widths |
| Coil ID | 150 mm to 610 mm |
| Coil OD | Up to 1800 mm |
| Condition | Solution annealed per ASTM A240 |
| Surface Finish | No.1, 2B, BA (Bright Annealed), Matte, Matte PVC, Skin Pass |
| Supply Form | Hot Rolled (HR), Cold Rolled (CR) |
| Edge | Slit edge, Mill edge, Deburred edge, Round edge |
Chromium at 18.0 to 20.0% builds the passive layer that protects these coils, while the 0.030% carbon ceiling separates 304L from standard 304. Full ASTM A240 limits appear below.
| Element | Composition (%) |
|---|---|
| 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) | 18.0 to 20.0 |
| Nickel (Ni) | 8.0 to 12.0 |
| Nitrogen (N) | 0.10 max |
| Iron (Fe) | Balance |
Annealed UNS S30403 coils pair a 485 MPa minimum tensile strength with 40% minimum elongation, which suits deep drawing, roll forming, and press work. ASTM A240 minimums are listed below.
| Property | Value |
|---|---|
|
Tensile Strength, minimum
|
485 MPa (70 ksi) |
|
Yield Strength (0.2% offset), minimum
|
170 MPa (25 ksi) |
|
Elongation in 50.8 mm (2 in.), minimum
|
40% |
|
Hardness, maximum
|
201 HBW / 92 HRB |
International buyers can match Type 304L coils against their regional designation using the table below. The coils we stock correspond to the designations shown for cross-reference.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | S30403 (AISI 304L) |
| Europe (EN) | X2CrNi18-9 |
| Germany (W.Nr) | 1.4307 |
| Japan (JIS) | SUS 304L |
| China (GB) | 022Cr19Ni10 |
| Russia (GOST) | 03Х18Н11 |
| France (AFNOR) | Z3CN18-10 (legacy) |
These four industries account for most of the 304L stainless steel coils we dispatch. Buyers in each of these sectors select the grade for its weldability, hygiene, and corrosion resistance rather than for raw strength.
Dairy and beverage plants form 304L coil into pasteuriser panels, storage silos, and conveyor covers. Cleaning regimes run hot, caustic, and frequent. The low-carbon grade takes repeated washdowns without surface breakdown, and its welded seams keep their corrosion resistance, so hygienic surfaces need less finishing work.
Chemical processors order SS 304L coil for vessel shells, tank linings, and exhaust ducting in organic acid and nitric service. Welded fabrication dominates this work. Because the grade resists sensitisation, fabricators can skip post-weld heat treatment on thin sections and still meet the corrosion specification on the finished vessel.
Pharmaceutical equipment builders specify Type 304L for mixing vessels, cleanroom panelling, and process skids. Product purity requirements typically drive material selection. A BA or 2B coil surface polishes down to the low roughness these plants demand, and the chemistry holds up under repeated steam sterilisation and CIP chemical cycles.
Architects and roofing contractors take 304L stainless coils for cladding, rainwater goods, and decorative panels on urban and inland buildings. Coil feeds roll-forming lines directly. Panels keep their finish for decades in ordinary town atmospheres, and high ductility lets profiles bend to tight radii.
Consignments leave our Mumbai and Taloja warehouses in wooden packing or on pallets, sea-ready for export.
| Parameter | Details |
|---|---|
| Packaging | Wooden packing, 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 |
304L stainless steel coil prices in India are currently around ₹180 to ₹220 per kg for standard items, or roughly $2.1 to $2.6 per kg for international buyers. LME nickel prices drive most of the movement. Thickness, width, finish, and quantity all affect the final price, and volume discounts apply, so call or WhatsApp us and we'll share today's rate.
We stock SS 304L coils from 0.03 mm to 5 mm thick and slit any width between 3 mm and 2000 mm, held to ±0.1 mm on narrow widths. Coil ID runs from 150 mm to 610 mm, with OD up to 1800 mm.
The main difference between 304 and 304L coils is carbon. Standard 304 allows up to 0.07% carbon under ASTM A240, while 304L caps it at 0.030%, so weld zones resist intergranular corrosion without any post-weld annealing step.
We supply 304L SS coils with EN 10204 Type 3.1 mill test certificates as standard, and Type 3.2 on request. Each certificate traces chemistry and test results to the parent heat.
Dispatch takes 4 to 5 days for standard orders from our Mumbai and Taloja warehouses. Urgent orders move in 2 to 3 days.
You can source Stainless Steel 304L Coils in India from us at Riddhi Siddhi Impex. Our warehouses hold ready coil stock for immediate slitting and dispatch, and as a stockist, dealer, and distributor, we serve buyers across India and export overseas. Call or WhatsApp us; quotations are issued within 24 hours.
