We are Riddhi Siddhi Impex, a Mumbai-based supplier and stockist of Stainless Steel 316L Sheets & Plates, established in 2002. We stock AISI 316L to ASTM A240 / ASME SA-240 as cold rolled sheets from 3.8 mm and hot rolled plates and sheets above, in widths up to 2000 mm. Our ISO 9001, 14001, and 45001-certified company, with a supply capacity of 400-500 tonnes per month, ships worldwide and provides EN 10204 Type 3.1 / 3.2 certificates on request.
Stainless Steel 316L sheets and plates are flat-rolled products of a low-carbon austenitic grade carrying 16 to 18% chromium, 10 to 14% nickel, and 2.00 to 3.00% molybdenum. Carbon stays under 0.030%. That ceiling stops chromium carbide from forming at grain boundaries during welding, so seams keep their corrosion resistance without a post-weld anneal. Molybdenum earns these stainless steel sheets and plates their marine reputation by blocking chloride pitting. Typical uses of Stainless Steel 316L sheets and plates include marine hardware, chemical storage tanks, pharmaceutical vats, and architectural structures.
Reputed primary mills roll the UNS S31603 flat stock we hold, and it waits on the shelf in Mumbai and Taloja for quick despatch. Cold rolled sheets span 3.8 mm to 6 mm; hot rolled plates carry on and above. Each lot arrives annealed to ASTM A240, and buyers needing narrower widths get them slit in-house to ±0.1 mm.
We provide ASTM A240 Type 316L sheets and plates from ready stock in the annealed condition, with six surface finishes, two edge options, and custom widths trimmed to order.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA-240, ASTM A480 |
| Aerospace Specification | AMS 5507 |
| 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 |
| Edge | Mill edge, Slit edge |
Carbon defines the L suffix. Alloy 316L caps it at 0.030%, well under standard 316's 0.08% limit, while 2.00 to 3.00% molybdenum anchors pitting resistance. ASTM A240 sets these limits.
| 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) | 16.0 to 18.0 |
| Nickel (Ni) | 10.0 to 14.0 |
| Molybdenum (Mo) | 2.00 to 3.00 |
| Nitrogen (N) | 0.10 max |
| Iron (Fe) | Balance |
Annealed ASME SA-240 Type 316L plate starts at 485 MPa tensile and stretches 40% before failure. We stock annealed material only; density is about 7.98 g/cm³.
| Property | Value |
|---|---|
|
Tensile Strength, minimum
|
485 MPa (70 ksi) |
|
Yield Strength (0.2% offset), minimum
|
170 MPa (25 ksi) |
|
Elongation in 50 mm, minimum
|
40% |
|
Hardness
|
95 HRB / 217 HBW |
Purchase orders drafted to European, Japanese, or Chinese codes cross to our 316L stainless steel sheet stock through the rows below. Every designation names the same low-carbon molybdenum chemistry.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | S31603 |
| Europe (EN) | X2CrNiMo17-12-2 |
| Germany (W.Nr) | 1.4404 |
| Japan (JIS) | SUS 316L |
| China (GB) | 022Cr17Ni12Mo2 |
| France (AFNOR) | Z3CND17-12-02 |
These 4 industries widely use the SS 316L sheets and plates issued from our warehouses. Buyers in each pick the grade for chloride resistance, weldability, or hygiene rather than headline strength.
Process plants form ASTM A240 Type 316L plate into reactor vessels, storage tanks, and exchanger shells carrying sulphuric, acetic, and phosphoric streams. Molybdenum keeps the passive layer intact where plain 304 pits. Once chloride loads climb past what UNS S31603 tolerates, we advise moving up to 317L plate.
Hygienic fabricators order 2B or BA finished 316L sheet for mixing tanks, process vessels, and clean-in-place pipework panels. Nothing coats the surface, so nothing flakes into the product. Steam sterilisation cycles and hot caustic washdowns leave the metal unmarked, which keeps purity audits and FDA-style inspections straightforward.
Shipyards and offshore contractors know this alloy as marine grade stainless steel. Plate goes into hull fittings, splash-zone cladding, walkway structures, and seawater piping supports where salt spray defeats leaner grades. Around welds and fastener holes, the molybdenum addition resists pitting and crevice attack.
Architects specify 316L SS sheet for facade cladding, handrails, and canopy panels on coastal and city buildings. Airborne salts and traffic fumes dull cheaper grades within a few seasons. A 316L skin holds its finish with routine washing, and welded joints stay clean because carbon never passes 0.030%.
Wooden cases and pallets protect flat stock in transit; both our warehouses handle domestic and export despatch.
| Parameter | Details |
|---|---|
| Packaging | Wooden cases, pallet packing |
| Incoterms | FOB, CIF, CFR, EXW |
| Dispatch Points | Mumbai and Taloja warehouses |
| Port | Mumbai |
| 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 |
316L stainless steel sheet price in India typically costs around ₹240-₹410 per kg, while export buyers generally pay about $2.6-$4.5 per kg on export terms. Nickel and molybdenum rates set the base; thickness, finish, and order volume settle the rest. Call or WhatsApp us for a firm quotation.
Yes, carbon content separates them. 316L holds 0.030% maximum against 0.08% for standard 316, so welded seams resist sensitisation. Mill lots frequently dual-certify to both grades because one chemistry satisfies each limit.
Stainless Steel 316L sheets and plates in India typically cost around ₹240-₹410 per kg, while export buyers generally pay about $2.6-$4.5 per kg for export buyers. Final figures track the nickel market and your exact specification.
SS316L plates weld without post-weld annealing because the 0.030% carbon cap prevents chromium carbide precipitation in the heat-affected zone.
We stock 2B, BA (Bright Annealed), Scotch-Brite, Matte, Matte PVC, and Skin Pass finishes. 2B covers most industrial orders.
Ready stock leaves from Mumbai or Taloja within 4 to 5 days, and urgent requirements dispatch in 2 to 3 days.
Riddhi Siddhi Impex is a Supplier, Stockist and Exporter of Stainless Steel 316L Sheets & Plates in India since 2002. Call / WhatsApp us your size, finish and quantity and we will give you a quote within 24 hours.
