We are Riddhi Siddhi Impex, a Mumbai-based supplier and stockist of Stainless Steel 304 Sheets & Plates, established in 2002. Our warehouses hold this 18/8 austenitic flat product to ASTM A240 / ASME SA-240, from 3.8 mm and above in widths up to 2000 mm. As an ISO 9001, 14001, and 45001-certified company, we supply 400-500 tons monthly and export to 60+ countries. We also provide EN 10204 Type 3.1 / 3.2 mill test certificates on request.
Stainless Steel 304 sheets and plates are flat-rolled austenitic stainless steel built on 18.0-20.0% chromium and 8.0-10.5% nickel, the classic 18/8 analysis. Chromium grows a passive oxide film that reseals itself when scratched; nickel keeps the structure austenitic, so the material offers excellent formability and weldability. No stainless steel sheets and plates moves in higher tonnage worldwide, and UNS S30400 flat product covers everything from dairy vats to building facades. Stainless Steel 304 sheets and plates are typically used to manufacture commercial food processing equipment, kitchen appliances, and structural cladding.
We stock this grade, acting as a trusted 304 stainless steel plate suppliers hub by buying from reputed primary mills and holding both forms ready in Mumbai. Cold-rolled sheets run 3.8 mm to 6 mm; hot-rolled plates carry on from 6 mm and above. All sheet 304 stainless steel products ship annealed, with EN 10204 Type 3.1 / 3.2 mill test certificates on request.
We provide ASTM A240 Type 304 sheets and plates in the annealed mill condition, six surface finishes, and custom widths slit to ±0.1 mm from ready Mumbai stock.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA-240 |
| Thickness (Sheets, CR) | 3.8 mm to 6 mm |
| Thickness (Plates, HR) | 6 mm and above |
| Width | 3 mm to 2000 mm |
| Width Tolerance | ±0.1 mm |
| Condition | Annealed (standard mill) |
| Surface Finish | 2B, BA (Bright Annealed), Scotch-Brite, Matte, Matte PVC, Skin Pass |
| Supply Forms | Hot rolled and Cold rolled |
| Edge | Mill edge |
| Form | Sheets, Plates |
Chromium provides the primary corrosion resistance in this grade. At 18.0-20.0% it holds the passive film through acids, alkalis, and weather, while carbon stays capped at 0.08% to limit sensitisation during 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) | 18.0-20.0 |
| Nickel (Ni) | 8.0-10.5 |
| Nitrogen (N) | 0.10 max |
| Iron (Fe) | Balance |
Annealed SA-240 Type 304 pairs 515 MPa minimum tensile strength with 40% elongation, so fabricators can deep-draw sinks, press panels, and weld tanks from the same stock.
| 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 ordering against national standards can match UNS S30400 sheets and plates through the designations below. We supply materials against every listing and provide a comprehensive 304 stainless steel data sheet for engineering approval.
| 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 6 industries widely use 304 stainless steel sheets and plates we dispatch. Each relies on the grade's corrosion resistance, formability, and hygienic surface.
Dairies and food plants build vats, conveyor panels, and work tables from Grade 304 sheet because food acids and routine cleaning chemicals are well tolerated under normal service conditions. Smooth 2B and BA finishes leave bacteria nowhere to lodge.
Chemical plants specify SS 304 plate for storage tanks, mixers, and process vessels handling nitric acid, alkalis, and organic media. Uniform corrosion resistance makes 304 stainless steel plate suitable for tanks and process equipment handling compatible chemicals.
Pharmaceutical manufacturers like the use of 304 stainless steel sheets for clean room furniture, blender bodies and machine cladding. The non-porous surface can resist repeated steam sterilisation and alcohol wiping, keeping product-contact areas free of contamination between batches.
Cladding of columns, lift interiors, facades, and street furniture in Cold-Rolled 304 Sheet. The Scotch-Brite and Matte coatings conceal fingerprints in high-traffic areas, and the grade offers good atmospheric corrosion protection in metropolitan situations.
Vessel shops order SA-240 Type 304 plate for ASME-coded drums, shells, and exchanger channels. The dual ASTM/ASME certification simplifies code compliance and offers good oxidation resistance at elevated temperatures under normal service conditions.
Commercial kitchen builders press sinks, hoods, counters, and cooking ranges from 2B-finish 304 SS sheets. High elongation lets deep bowls form in a single draw, and the surface tolerates salt, steam, and scouring without staining.
Sheets and plates are issued from our Mumbai and Taloja warehouses, packed flat in wooden cases or on pallets, and packed for domestic and export dispatch.
| Parameter | Details |
|---|---|
| Packaging | Wooden cases, pallet packing |
| Incoterms | FOB, CIF, CFR, EXW Mumbai |
| Dispatch Points | Mumbai and Taloja warehouses |
| Standard Lead Time | 4-5 days |
| Urgent Dispatch | 2-3 days |
| Payment Terms | Advance, credit, LC |
| Certification | EN 10204 Type 3.1 / 3.2 mill test certificates on request |
The price of Stainless Steel 304 Sheets & Plates in India ranges from approximately ₹145 to ₹266 per kg, while export pricing is typically quoted at $1.9 to $3.9 per kg, depending on the quantity, finish, and thickness. The figure is influenced by nickel rates, thickness, finish, and order volume. For the current rate, please contact us via WhatsApp or phone.
We supply Stainless Steel 304 Sheets & Plates from 3.8 mm and above in widths up to 2000 mm. Custom widths slit to ±0.1 mm are available on request.
The difference between Stainless Steel 304 sheets and plates lies in thickness and rolling route. Sheets are 3.8 mm to 6 mm cold rolled with fine finishes; plates around 6 mm and above hot rolled.
Yes, Stainless Steel 304 Sheets & Plates are suitable for food-contact surfaces. The 18/8 composition resists food acids and cleaning chemicals, which is why dairy, brewery, and catering equipment builders treat the grade as standard.
The weight of a Stainless Steel 304 sheet or plate equals length (m) x width (m) x thickness (mm) x 7.93 kg. A 2500 x 1250 x 2 mm sheet therefore weighs about 49.6 kg.
You can source Stainless Steel 304 Sheets & Plates in India from us at Riddhi Siddhi Impex, a supplier, stockist, and exporter since 2002. Our Mumbai and Taloja warehouses dispatch in 4-5 days, or 2-3 days urgent. Call or WhatsApp us; we provide quotes within 24 hours.
