We are Riddhi Siddhi Impex, a Mumbai-based Stainless Steel 316L Shims manufacturer and supplier, established in 2002. We slit low-carbon UNS S31603 shim stock to ASTM A240 / ASME SA-240 in thicknesses from 0.03 mm to 5 mm. Our ISO 9001, 14001, and 45001-certified company holds ready stock, holds a supply capacity of 400 to 500 tons monthly, and issues EN 10204 Type 3.1 / 3.2 certificates on request.
Stainless Steel 316L Shims are precision spacers slit from a molybdenum-bearing austenitic stainless steel holding 16 to 18% chromium, 10 to 14% nickel, and 2 to 3% molybdenum. Carbon stays below 0.030%, so welded joints keep their resistance to intergranular attack. These low-carbon stainless steel shims are the default spacing choice near seawater, brines, and process acids, where Type 304 is more susceptible to pitting. Typical uses of Stainless Steel 316L Shims include spacing, alignment, and gap correction in marine engineering, chemical processing, and pharmaceutical equipment.
As a reliable Stainless Steel 316L Shim supplier, every shim we supply is slit from a source coil on our own production lines; we don't resell fixed widths. Material leaves in annealed soft condition to ASTM A240, in any width from 3 mm to 2000 mm. Buyers pick BA, 2B, and Matte surfaces with slit, deburred, or round edges, and a mill test certificate traces each coil from inspection through dispatch upon request.
We provide ASTM A240 316L shim stock in annealed condition, with three surface finishes and three edge options, supplied in coil lengths.
| 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 |
| Condition | Annealed (Soft) |
| Surface Finish | BA (Bright Annealed), 2B, Matte |
| Edge | Slit edge, Deburred edge, Round edge |
| Supply form | Cold Rolled |
The "L" designation indicates the grade's low carbon content. The 0.030% maximum carbon content minimises chromium carbide formation during welding, while 2 to 3% molybdenum shields UNS S31603 shims against chloride pitting.
| 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) | 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 |
SS 316L shims ship annealed only; the grade carries no temper ladder. Even in the annealed condition, the material provides a 485 MPa minimum tensile strength with 40% elongation, so it punches and forms cleanly. Values at gauges under 0.38 mm are indicative per A240.
| 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
|
217 HBW / 95 HRB max |
Buyers ordering against a regional code can match AISI 316L shims to the designations below. A4 (the ISO 3506 fastener-grade class covering 316-family austenitics) shares this 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 use the 316L stainless shim stock we slit. Each one selects the grade for corrosion resistance and clean formability rather than raw strength.
Acid plants and refineries pack reactor flanges, exchanger tube sheets, and pump bases with 316L SS shims. The molybdenum content holds off pitting in sulphuric and phosphoric service, where carbon steel spacers corrode and lose thickness. Spacers keep their gauge, so bolted joints stay tight between turnarounds.
Dairies and drug makers run hot caustic wash cycles that attack ordinary spacer steel. Fitters level mixer mounts, filler heads, and valve seats on pharmaceutical-grade 316L shims because the passive surface survives repeated steam sterilisation without leaching. A smooth BA or 2B finish leaves nowhere for residue to lodge.
Shipyards and offshore crews shim propulsion mounts, deck machinery, and instrument housings exposed to salt spray. Chloride pitting destroys standard austenitic spacers in these conditions; the 2 to 3% molybdenum in 316L resists it. Custom-slit widths seat cleanly against flange faces without site trimming.
Machine builders set bearing preloads, align gearbox housings, and correct tolerance stack-ups with shims whose thickness is controlled to a few microns, so assemblers can fine-tune clearances in steps as small as 0.05 mm. Thin 316L stainless steel shim plates from 0.03 mm gauge let assemblers fine-tune clearances in 0.05 mm steps. Consistent thickness across the coil keeps every calculation valid.
Shim consignments are issued from our Mumbai and Taloja warehouses within days, packed for road transport or export sea freight.
| 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 on request |
Stainless Steel 316L Shims price in India runs around ₹290 to ₹360 per kg, or $3.30 to $4.25/kg for export buyers. Nickel and molybdenum rates move the band; gauge, width, finish, and volume shift it further. Call or WhatsApp our team for today's firm rate.
We slit SS 316L shim stock from 0.03 mm to 5 mm thick, to any width between 3 mm and 2000 mm at ±0.1 mm. Thinner material falls under our SS 316L foil range.
SS 316 and SS 316L shims differ in carbon content. 316L caps carbon at 0.030% against 0.08% in 316, which prevents carbide precipitation during welding and preserves intergranular corrosion resistance in welded shim packs.
Yes, SS 316L shims perform well in marine environments. Their 2 to 3% molybdenum resists the pitting and crevice corrosion that chloride spray causes in coastal and offshore installations.
We supply 316L shim washers to your specified inner diameter, outer diameter, and thickness. Send us the dimensions and quantity, and we'll quote within 24 hours.
SS316L shim orders can carry EN 10204 Type 3.1 or 3.2 mill test certificates on request, with technical data sheets available. Our company is certified to ISO 9001, 14001, and 45001.
You can source Stainless Steel 316L Shims in India from us at Riddhi Siddhi Impex. Our Mumbai and Taloja warehouses hold ready S31603 stock, slit and dispatched in 4 to 5 days. As a stockist and exporter, we serve buyers across India and overseas.
