We are Riddhi Siddhi Impex, a Mumbai-based manufacturer and supplier of Hastelloy C22 shims, established in 2002. Our own slitting lines process Alloy C-22 (UNS N06022) shim stock to ASTM B575 / ASME SB-575, from 0.03 mm to 5 mm thick and held to ±0.1 mm on width. Our ISO 9001, 14001, and 45001-certified firm carries a monthly supply capacity of 400-500 tonnes, with EN 10204 Type 3.1 / 3.2 certificates on request.
Hastelloy C22 shims are thin, precision-slit spacers cut from a nickel-chromium-molybdenum-tungsten alloy. Chromium at 20.0 to 22.5% protects the surface in oxidising media, while molybdenum at 12.5 to 14.5% and tungsten at 2.5 to 3.5% stop pitting and crevice corrosion in reducing acids and chlorides. Carbon is capped at 0.015% max, so welded assemblies keep their resistance without further heat treatment. These Hastelloy Shims are used in the desulphurisation process and power generation.
Fitters use them to set flange gaps, align machine bases, and adjust seal clearances in corrosive plants. As a reputed Hastelloy C22 Shims supplier and manufacturer, we slit every piece in-house from the source coil, so odd widths cost nothing extra.
We provide ASTM B575 shim stock with the finishes, edges, and dimensions mentioned in the table given below.
| Parameter | Details |
|---|---|
| Standard | ASTM B575 / ASME SB-575 |
| Thickness | 0.03 mm to 5 mm |
| Width | 3 mm to 2000 mm |
| Width Tolerance | ±0.1 mm |
| Condition | Annealed (standard mill) |
| Surface Finish | BA (Bright Annealed), 2B, Matte |
| Edge | Slit edge, Deburred edge, Round edge |
Alloy C22 shims owe their balanced corrosion resistance to chromium at 20.0 to 22.5%, the highest in this alloy family. The full ASTM B575 limits appear below.
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | Balance (approx. 56) |
| Chromium (Cr) | 20.0 to 22.5 |
| Molybdenum (Mo) | 12.5 to 14.5 |
| Iron (Fe) | 2.0 to 6.0 |
| Tungsten (W) | 2.5 to 3.5 |
| Cobalt (Co) | 2.5 max |
| Manganese (Mn) | 0.50 max |
| Vanadium (V) | 0.35 max |
| Carbon (C) | 0.015 max |
| Silicon (Si) | 0.08 max |
| Phosphorus (P) | 0.02 max |
| Sulphur (S) | 0.02 max |
Hastelloy C22 shim stock in the annealed condition meets 690 MPa tensile, 310 MPa yield, and 45% elongation minimums per ASTM B575. C22 isn't a temper-graded alloy; shims ship annealed, and cold-rolled stock at higher strength is produced against order and certified individually. Below 0.5 mm, the standard may not specify testing, so values there are indicative.
| Property | Value (Annealed) |
|---|---|
|
Tensile Strength, minimum
|
690 MPa (100 ksi) |
|
Yield Strength (0.2% offset), minimum
|
310 MPa (45 ksi) |
|
Elongation in 50 mm, minimum
|
45% |
Buyers ordering 2.4602 shims or N06022 shims under a regional standard can match designations here. The compatible weld filler is ERNiCrMo-10.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | N06022 |
| Europe (EN) | NiCr21Mo14W |
| Germany (W.Nr) | 2.4602 |
| Japan (JIS) | NW6022 |
| China (GB) | NS3308 |
These 4 industries use the Nickel Alloy C22 shims we slit, each needing accurate spacers in corrosive service.
Chemical plants use Alloy C-22 shims at pump bases, reactor flanges, and heat exchanger mounts. One grade covers sulphuric, nitric, and hydrochloric streams in the same circuit, so maintenance teams stock a single shim material rather than three.
Scrubber dampers, duct joints, and instrument mounts in FGD service take C22 shim stock. Hot condensate in these systems carries sulphuric acid and heavy chlorides together, and the chromium-molybdenum balance keeps shims dimensionally stable between outage cycles.
Hygienic machinery uses Nickel Alloy C22 shims to align shafts, level vessels, and set seal faces. The alloy tolerates chlorinated clean-in-place chemistry and leaves no metallic pick-up in product zones.
Power stations specify UNS N06022 shims for turbine auxiliaries, condenser fittings, and stack instrumentation exposed to acidic condensate. Thin gauges allow alignment correction in fine steps, and the alloy outlasts carbon steel packs in flue-side service.
Shim orders leave from our Mumbai and Taloja warehouses in wooden cases or on pallets, ready for export.
| 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 |
Hastelloy C22 shims price in India is around ₹2,515 to ₹3,000 per kg, roughly $26 to $32 per kg for export buyers. The range is indicative: nickel and molybdenum benchmarks, thickness, width, finish, and quantity all move it, and precision-slit narrow widths sit at the upper end. Call or WhatsApp us with your size and grade for today's rate.
We slit Hastelloy C22 shims from 0.03 mm to 5 mm thick, in any width between 3 mm and 2000 mm at ±0.1 mm. Anything thinner belongs to our Hastelloy C22 foil range.
Hastelloy C22 shim stock is covered by ASTM B575 and its ASME equivalent SB-575, which cover low-carbon Ni-Cr-Mo-W alloy plate, sheet, and strip.
Hastelloy C22 shims differ from C276 shims mainly in chromium, holding roughly six points more (20.0 to 22.5% versus 14.5 to 16.5%). That extra chromium widens their tolerance of oxidising media and chloride pitting. C276 keeps the advantage in hot, strongly reducing acids, so where a shim faces mixed or swinging chemistry, C22 offers more margin.
The surface finishes available on Hastelloy C22 shims are BA (Bright Annealed), 2B, and Matte. Deburred or round edges suit gasket and instrument work, where a sharp slit edge would scratch mating faces.
Yes, Hastelloy C22 shims can be custom-slit to any width from 3 mm to 2000 mm, held to ±0.1 mm.
The price of Hastelloy C22 shims is around ₹2,515 to ₹3,000 per kg in India, roughly $26 to $32 per kg for export. Thickness, width, finish, quantity, and prevailing nickel rates shift the figure, so ask for a firm quote.
You can source Hastelloy C22 shims in India from us at Riddhi Siddhi Impex. As a Mumbai-based manufacturer, supplier, and exporter since 2002, we slit shim stock in-house and dispatch across India and overseas. Call or WhatsApp us, and we will provide a quote within 24 hours.
