We are Riddhi Siddhi Impex, a Mumbai-based supplier and stockist of Stainless Steel 304 Coils, established in 2002. As an ISO 9001, 14001, and 45001-certified company, we hold austenitic chromium-nickel coils to ASTM A240 / ASME SA-240, precision slit to a width tolerance of ±0.1 mm, and export to 60+ countries. Our supply capacity is 400 to 500 tons monthly, with EN 10204 Type 3.1 / 3.2 mill test certificates on request.
Stainless Steel 304 coils are flat-rolled austenitic stainless steel coils built on the 18/8 chromium-nickel balance, the most widely bought composition in the stainless family. Chromium between 17.5 and 19.5% grows a passive oxide film that repairs itself when scratched, while 8.0 to 10.5% nickel holds the structure austenitic. The alloy offers excellent deep drawability, tight-radius bending, and weldability without preheating. Stainless Steel 304 coils are typically used to manufacture kitchen equipment, automotive trim, chemical containers, and architectural panelling.
As premier 304 stainless steel coil suppliers, we buy prime source coils from reputed primary mills, slit them in-house to widths from 3 mm, and keep hot rolled and cold rolled material ready at Mumbai and Taloja in 2B, BA, Matte, or Scotch-Brite finish.
We provide ASTM A240 Type 304 coils in the annealed mill condition, covering four surface finishes and three edge options, precision-slit to your width from ready stock.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA-240 |
| Thickness | 0.03 mm to 5 mm |
| Width | 3 mm to 2000 mm |
| Width Tolerance | ±0.1 mm |
| Coil ID | 150 mm to 610 mm |
| Coil OD | Up to 1800 mm |
| Condition | Annealed (standard mill) |
| Surface Finish | 2B, BA (Bright Annealed), Matte, Scotch-Brite |
| Supply Forms | Hot rolled and Cold rolled |
| Edge | Mill edge, Slit edge, Deburred edge |
Chromium carries this grade. At 17.5 to 19.5% it builds the self-healing passive layer, and nickel at 8.0 to 10.5% keeps the matrix ductile through forming and welding.
| Element | Composition (% by weight) |
|---|---|
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.045 max |
| Sulphur (S) | 0.030 max |
| Silicon (Si) | 0.75 max |
| Chromium (Cr) | 17.50 to 19.50 |
| Nickel (Ni) | 8.00 to 10.50 |
| Nitrogen (N) | 0.10 max |
| Iron (Fe) | Balance |
Annealed SS 304 coils deliver 515 MPa minimum tensile strength with 40% elongation, enough ductility for deep drawing and tight-radius work. Coils ship annealed only.
| Property | Value (Annealed) |
|---|---|
|
Tensile Strength, minimum
|
515 MPa (75 ksi) |
|
Yield Strength (0.2% offset), minimum
|
205 MPa (30 ksi) |
|
Elongation in 50 mm, minimum
|
40% |
|
Hardness, maximum
|
201 HBW / 92 HRB |
Buyers matching UNS S30400 coils against a regional standard can work from the table below. Every designation listed covers the same 18/8 austenitic chemistry.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | S30400 |
| Europe (EN) | X5CrNi18-10 |
| Germany (W.Nr) | 1.4301 |
| Japan (JIS) | SUS304 |
| China (GB) | 06Cr19Ni10 |
| Russia (GOST) | 08Х18Н10 |
These 4 industries use the 304 SS coils we dispatch. Buyers settle on the grade for corrosion resistance, hygienic surfaces, and clean weldability at a workable price.
Dairies and food plants form 304 stainless steel coils into storage tanks, conveyor pans, and processing surfaces that face organic acids and daily CIP chemicals. The 2B finish wipes clean without harbouring bacteria, and the grade sheds no taste or colour into the product.
Chemical plants line vessels, ducting, and transfer systems with Stainless Steel 304 Coils wherever media stay mild and chloride levels low. Pharmaceutical fabricators favour the BA finish for cleanroom equipment because the bright, tight surface polishes to hygienic standards quickly.
Fabricators press AISI 304 coils into trim sections, clamps, fuel tank straps, and washer housings by the tonne. Consistent annealed mechanicals matter here, since stamping lines run thousands of strokes per shift and any gauge or hardness drift scraps parts fast.
Builders specify Type 304 stainless steel coils for cladding, column covers, handrails, and roofing flashings that stay bright for decades in urban atmospheres. Cold rolled material in 2B or Scotch-Brite gives architects a uniform surface straight off the coil.
Orders are issued from Mumbai and Taloja within days, packed for sea freight with full documentation.
| 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 |
304 stainless steel coil price in India currently is at ₹180 to ₹240 per kg, roughly $1.9 to $2.5 per kg for export orders. Nickel movement on the exchange shifts the rate week to week, along with thickness, finish, and volume. Call or WhatsApp us for today's figure.
We supply Stainless Steel 304 Coils in thicknesses from 0.03 mm to 5 mm and widths from 3 mm up to 2000 mm, slit to ±0.1 mm. Coil ID runs 150 mm to 610 mm, with OD up to 1800 mm.
The difference between hot rolled and cold-rolled stainless steel 304 Coils comes down to gauge and surface. HR material covers thicker sections with a pickled finish for structural work, while CR coils hold tighter tolerances and smoother 2B or BA surfaces for appliances and panels.
SS 304 coils carry up to 0.08% carbon, while 304L caps it at 0.030% to limit carbide precipitation in weld zones. Heavy welded sections stay corrosion resistant longer in 304L; standard 304 gives slightly higher strength for forming and general fabrication.
The HSN code for Stainless Steel 304 Coils is 7219 for widths of 600 mm and above, and 7220 for narrower slit coils. Both headings cover flat-rolled stainless steel products.
Surface finishes available for SS 304 coils cover 2B, BA (Bright Annealed), Matte, and Scotch-Brite, over hot rolled and cold rolled material with mill, slit, or deburred edges.
You can source Stainless Steel 304 Coils in India from us at Riddhi Siddhi Impex. Ready stock at our Mumbai and Taloja warehouses ships in 4 to 5 days, or 2 to 3 days when urgent. Call or WhatsApp us, and your quote will be provided within 24 hours.
