We are Riddhi Siddhi Impex, a Mumbai-based Stainless Steel 317L Shims manufacturer and supplier, established in 2002. We slit UNS S31703 stock to ASTM A240 / ASME SA-240, from 0.03 mm to 5 mm thick. Our ISO 9001, 14001, and 45001-certified firm holds ready stock and has a monthly supply of 400-500 tonnes and ships worldwide with EN 10204 Type 3.1 / 3.2 mill test certificates on request.
Stainless Steel 317L Shims are thin, flat spacers slit from a low-carbon, molybdenum-bearing austenitic stainless steel. The grade carries 3.0 to 4.0% molybdenum, more than 316L, which sharpens its resistance to chloride pitting and crevice attack. Chromium at 18 to 20% builds the passive film, while 11 to 15% nickel keeps the austenite stable and non-magnetic. A 0.030% carbon ceiling curbs chromium carbide precipitation during welding, so the shim holds its corrosion resistance across heat-affected zones. Fabricators use these stainless steel shims around flanges, pump housings, and reactor internals.
As a Stainless Steel 317L Shim supplier and manufacturer, we slit every 317L shim in-house rather than reselling fixed widths. Material leaves the line in annealed soft condition to ASTM A240, in any width from 3 mm to 2000 mm at ±0.1 mm. Buyers choose BA, 2B, Matte surfaces, with deburred or round edges for gasket faces. Our documented quality system tracks each coil from inspection through to dispatch.
We provide ASTM A240 Type 317L shim stock in an annealed condition, with three surface finishes and edge options.
| 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 |
| Supply Form | Cold Rolled |
| Condition | Annealed (Soft) |
| Surface Finish | BA (Bright Annealed), 2B, Matte |
| Edge | Slit edge, Deburred edge, Round edge |
Molybdenum sets this grade apart. At 3.0 to 4.0%, it lifts pitting resistance well above 316L, so SS 317L shims hold up in sulphuric and phosphoric acid. The full A240 composition follows.
| 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) | 18.0 to 20.0 |
| Nickel (Ni) | 11.0 to 15.0 |
| Molybdenum (Mo) | 3.0 to 4.0 |
| Nitrogen (N) | 0.10 max |
| Iron (Fe) | Balance |
317L is supplied annealed, not tempered, so a single soft condition covers gasketing and spacing duty. Annealed 317L Stainless Steel Shims reach a 515 MPa minimum tensile strength with 40% elongation, so they punch and form without cracking.
| Property | Value |
|---|---|
|
Tensile Strength, minimum
|
515 MPa (75 ksi) |
|
Yield Strength (0.2% offset), minimum
|
205 MPa (30 ksi) |
|
Elongation in 50 mm, minimum
|
40% |
|
Hardness
|
217 HBW / 95 HRB max |
International buyers can cross-reference UNS S31703 shims against the nearest designation in their region using the table below. AISI 317L stock from our inventory matches every designation listed.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | S31703 |
| Europe (EN) | X2CrNiMo18-15-4 |
| Germany (W.Nr) | 1.4438 |
| Japan (JIS) | SUS317L |
| China (GB) | 022Cr19Ni13Mo3 |
| Russia (GOST) | 03Х16Н15М3 |
These 3 industries widely specify the 317L shims we slit. In each case, buyers choose the grade for its molybdenum-driven corrosion resistance rather than raw strength.
Acid plants and petrochemical units use 317L shims around reactor flanges, heat-exchanger tube sheets, and pump mounts. The 3 to 4% molybdenum content resists pitting in dilute sulphuric and phosphoric acid, where 316L begins to corrode, and spacers lose thickness.
Pharmaceutical and food fitters level mixer mounts, filler heads, and reactor seals on Alloy 317L shims. The low-carbon ceiling keeps grain boundaries clean after welding, so cleaning cycles with hot caustic and chloride sanitisers face less pitting.
Bleach plants and digesters expose metal to chloride and sulphur compounds at a temperature. Pulp and paper engineers pack washer bearings, valve bodies, and pipework flanges with 317L Mo stainless shims because the molybdenum resists crevice damage in these liquors.
Shim orders leave from our Mumbai and Taloja warehouses within days, packed for 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 mill test certificates on request |
Stainless Steel 317L Shims price in India ranges from INR 255-450 per kg, about USD $2.65 to $4.7 per kg for overseas buyers. Higher molybdenum and nickel content put 317L above 316L in cost. The band is indicative: alloy surcharges, gauge, width, finish, and volume all shift it. Call or WhatsApp our team for today's firm rate.
We slit SS 317L shim stock from 0.03 mm to 5 mm thick, to any width between 3 mm and 2000 mm at ±0.1 mm. Anything thinner falls under our SS 317L foil range.
The main difference is molybdenum: 317L holds 3.0 to 4.0% against 2.0 to 3.0% in 316L, with higher chromium and nickel too. That extra molybdenum gives 317L stronger resistance to pitting and crevice corrosion in aggressive chloride and acid service.
Yes. We precision-slit 317L shims in-house from 3 mm to 2000 mm wide at ±0.1 mm tolerance. Send us your required width and gauge for a prompt quotation.
We supply BA (Bright Annealed), 2B, and Matte finishes. Deburred or round edges suit gasket and winding work, where a sharp slit edge would score the mating face.
Every consignment can carry an EN 10204 Type 3.1 or 3.2 mill test certificate on request, giving full traceability to ASTM A240. Technical data sheets are also available, and we operate an ISO 9001 quality system.
You can source Stainless Steel 317L Shims in India from us at Riddhi Siddhi Impex. Our Mumbai and Taloja warehouses hold ready S31703 stock, slit and dispatched within 4 to 5 days. As a stockist and exporter, we serve buyers across India and overseas; get a quote within 24 hours.
