We are Riddhi Siddhi Impex, a Mumbai-based manufacturer and supplier of Stainless Steel 410 Shims, established in 2002. Our slitting lines convert martensitic chromium coil into shim stock to ASTM A240 / ASME SA-240, with thicknesses ranging from 0.03 mm to 5 mm. Our ISO 9001, 14001, and 45001-certified company holds ready stock, a supply capacity 400-500 tons monthly, and issues EN 10204 Type 3.1 / 3.2 mill test certificates on request.
Stainless Steel 410 shims are precision-slit martensitic spacers carrying 11.50 to 13.50% chromium and 0.08 to 0.15% carbon. That carbon floor is the point: unlike austenitic or ferritic shim grades, a 410 SS shim hardens by quenching and tempering, so a spacer fitted soft can later be treated to resist wear. The grade is strongly magnetic, and its low nickel content keeps it among the cost-effective stainless steel shims options. Stainless Steel 410 shims are typically used for high-strength levelling and wear-resistant spacing in pumps, valves, and heavy industrial machinery.
As a leading Stainless Steel 410 Shim supplier, we supply these shims to maintenance crews and OEMs for use where parts rub, seat, or carry load spots that would batter a softer austenitic spacer. We slit every 410 shim in-house from stainless steel coil, ship the annealed condition per ASTM A240, and hold widths from 3 mm to 2000 mm at ±0.1 mm, with deburred or round edges available for gasket and seat faces.
We provide SS 410 Shims to ASTM A240 / ASME SA-240, with AMS 5504 available for aerospace orders, slit from ready stock in the finishes and edges below.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SA-240 |
| Aerospace Standard | AMS 5504 |
| Thickness | 0.03 mm to 5 mm |
| Width | 3 mm to 2000 mm |
| Width Tolerance | ±0.1 mm |
| Condition | Annealed (Soft) |
| Supply Forms | Hot rolled and Cold rolled |
| Surface Finish | BA (Bright Annealed), 2B, Matte, Matte PVC |
| Edge | Slit edge, Deburred edge, Round edge |
Carbon separates Grade 410 Shims from every other stainless shim we slit. ASTM A240 sets a 0.08% floor and a 0.15% ceiling on carbon. Chromium at 11.50 to 13.50% maintains the passive surface.
| Element | Composition (% by weight) |
|---|---|
| Carbon (C) | 0.08 to 0.15 |
| Manganese (Mn) | 1.00 max |
| Phosphorus (P) | 0.040 max |
| Sulphur (S) | 0.030 max |
| Silicon (Si) | 1.00 max |
| Chromium (Cr) | 11.50 to 13.50 |
| Nickel (Ni) | 0.75 max |
| Iron (Fe) | Balance |
Annealed 410 Stainless Steel Shims punch and form readily at 20% minimum elongation, then respond to heat treatment. Stock ships soft only; hardening happens after fabrication. Because raw 410 stainless steel shim stock forms easily before heat treatment, fabricators choose our custom 410 stainless steel shims for complex stamped parts that require an ultimate oil-quench hardening step.
| Property | Value (Annealed) |
|---|---|
|
Tensile Strength, minimum
|
450 MPa (65 ksi) |
|
Yield Strength (0.2% offset), minimum
|
205 MPa (30 ksi) |
|
Elongation in 50 mm, minimum
|
20% |
|
Hardness, maximum
|
217 HBW / 96 HRB |
Buyers specifying UNS S41000 Shims, material under a regional code, can cross-reference the designations below; our stock matches each listing.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | S41000 |
| Europe (EN) | X12Cr13 |
| Germany (W.Nr.) | 1.4006 |
| Japan (JIS) | SUS410 |
| China (GB) | 12Cr13 |
| Russia (GOST) | 12Kh13 |
These 4 industries use the 410 SS shims. Each one picks the grade for hardenability and wear resistance at a price close to plain chromium steel.
Automotive plants set valve-train clearances, clutch pack heights, and brake assembly gaps with Type 410 Shims. The spacer survives vibration and fretting that would work-harden and crack thinner austenitic stock, and hardened shims hold their thickness under repeated impact loading.
Valve builders shim seat rings, gland followers, and wear plates with 410 stainless steel shims. Once quenched and tempered, the material resists erosion from steam and water flow, so clearance settings survive years of throttling service without the seat faces washing out.
Refineries level column internals, pack pump baseplates, and adjust coupling alignment with SS410 shims. The grade tolerates hot, sulphur-bearing hydrocarbon streams that corrode carbon steel packers quickly, while costing far less than the nickel-alloy spacers reserved for chloride service.
Machine shops keep 410 stainless shims for setting die clearances, bearing preloads, and machine-bed levels. Thicknesses from 0.03 mm permit height correction in fine steps, and the same stocked material can be heat treated whenever an application calls for a wear-resistant packer.
Shim orders dispatch 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 410 Shims price in India is around ₹160 to ₹320 per kg, while export buyers generally pay about $1.7 to $3.3 per kg depending on thickness, finish, and quantity. The band is indicative; ferrochrome benchmarks, thickness, width, finish, and order volume all shift it. Call or WhatsApp our team for today's rate for your size.
SS 410 shims are available from 0.03 mm to 5 mm thick and custom-slit to any width between 3 mm and 2000 mm at ±0.1 mm tolerance.
Yes, Stainless Steel 410 Shims are strongly magnetic. The martensitic structure attracts a magnet in the annealed state and stays magnetic after hardening.
Yes, 410 SS shims can be hardened after forming. Fabricators blank and fit the annealed stock first, then oil-quench and temper the finished piece to roughly 40 HRC where the application demands wear resistance.
Stainless Steel 410 shim stock is covered by ASTM A240 / ASME SA-240 for flat-rolled products, with ASTM A480 general requirements and AMS 5504 for aerospace orders.
Stainless Steel 410 Shims cost around ₹160-320 per kg in India, about $1.7-3.3 per kg for export. Send your thickness, width, and quantity for a firm figure.
You can source Stainless Steel 410 Shims in India from us at Riddhi Siddhi Impex. Our Mumbai and Taloja warehouses hold ready martensitic shim stock, and quotes will be provided within 24 hours; just phone or WhatsApp.
