We at Riddhi Siddhi Impex manufacture and supply Hastelloy C22 foils from Mumbai, where we have slit nickel alloys in-house since 2002. Alloy C-22 (UNS N06022) foil leaves our lines to ASTM B575 / ASME SB-575, from 0.03 mm to 0.08 mm thick. Our ISO 9001, 14001, and 45001-certified firm carries a monthly supply capacity of 400-500 tonnes and can hold up to 1000 tonnes annually, with EN 10204 Type 3.1 / 3.2 certificates on request.
Hastelloy C22 foils are thin-gauge flat products of a nickel-chromium-molybdenum-tungsten alloy. Chromium at 20.0 to 22.5% protects the foil in oxidising media. Molybdenum at 12.5 to 14.5%, working with 2.5 to 3.5% tungsten, blocks pitting and crevice attack in reducing acids and chlorides. Carbon stays at 0.015% max, so thin-welded sections enter service without post-weld annealing. Rolled down to foil gauge, the grade becomes diaphragm, bellows, and gasket stock for chemistry that destroys stainless foil. These Hastelloy Foils are used in pharmaceuticals and chemical processing industries.
As a reputed Hastelloy C22 Foil supplier, we slit every UNS N06022 foil on our own precision lines, cutting any width from 3 mm to 2000 mm at ±0.1 mm. Material ships soft annealed in BA, 2B, Matte surfaces with slit, deburred, or round edges.
We supply ASTM B575 foil in the annealed condition across the thicknesses, finishes, and edge options listed below.
| Parameter | Details |
|---|---|
| Standard | ASTM B575 / ASME SB-575 |
| Thickness | 0.03 mm to 0.08 mm |
| Width | 3 mm to 2000 mm |
| Condition | Annealed (Soft) |
| Surface Finish | BA (Bright Annealed), 2B, Matte |
| Edge | Slit, Deburred, Round |
| Supply Form | Cold Rolled (CR) |
Tungsten at 2.5 to 3.5% rounds out the Ni-Cr-Mo core of Hastelloy C-22 foil, sharpening its resistance to localised chloride corrosion. 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 |
| Tungsten (W) | 2.5 to 3.5 |
| Iron (Fe) | 2.0 to 6.0 |
| Cobalt (Co) | 2.5 max |
| Manganese (Mn) | 0.50 max |
| Vanadium (V) | 0.35 max |
| Silicon (Si) | 0.08 max |
| Carbon (C) | 0.015 max |
| Phosphorus (P) | 0.02 max |
| Sulphur (S) | 0.02 max |
Annealed Alloy C22 foil meets a 690 MPa minimum tensile strength with 310 MPa yield and 45% elongation, ductility that suits deep drawing and tight forming. ASTM B575 applies its yield and elongation minimums to gauges of 0.5 mm and above, so values for thinner foil are indicative. C22 isn't a temper-graded alloy: we hold stock annealed, and cold-rolled foil at higher tensile levels is produced against order and certified individually.
| 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 who order W.Nr 2.4602 foil or NiCr21Mo14W under a regional standard receive the same alloy we stock as UNS N06022. Cross-reference each designation below.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | N06022 |
| Europe (EN) | NiCr21Mo14W |
| Germany (W.Nr) | 2.4602 |
| Japan (JIS) | NW6022 |
| China (GB) | NS3308 |
These 4 industries use Nickel Alloy C-22 foil we dispatch, each pairing aggressive chemistry with thin-section components.
Chemical plants use Alloy C-22 foil in diaphragms, gaskets, and instrument bellows for circuits carrying mixed acids. One grade covers streams that swing between oxidising and reducing composition, and its as-welded corrosion resistance lets fabricators build thin assemblies without a solution anneal.
Hygienic seals, rupture discs, and sensing diaphragms in pharmaceutical lines use Alloy 22 foil. The alloy withstands chlorinated and acidic clean-in-place agents through repeated sterilisation cycles. Product streams stay free of metallic pick-up, which matters wherever batch purity is audited.
Expansion joint bellows and seal foils in FGD ducting rely on HC-22 foil. Hot condensate in scrubber systems mixes sulphuric acid with heavy chloride loading, and the high chromium content keeps thin flexible sections serviceable between maintenance outages.
Bleach plant instrumentation draws on C22 foil for measurement diaphragms and protective linings near chlorine dioxide generators. Oxidising bleach chemistry favours the grade, and thin gauge preserves the sensitivity these sensing parts need.
We dispatch Hastelloy C-22 foils 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 |
| 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 |
Indicative pricing for Hastelloy C22 foil runs from ₹2,700 to ₹3,500 per kg for Indian buyers and $39 to $63 per kg for export. Thin precision gauges sit at the upper end of the band. Rates track nickel and molybdenum benchmarks, and thickness, width, finish, and quantity all move the figure, so call or WhatsApp us with your requirement for a firm quote.
Hastelloy C22 foils are available from 0.03 mm to 0.08 mm thick and 3 mm to 2000 mm wide, with width dimensions held to ±0.1 mm.
No, Hastelloy C22 foils don't carry a temper ladder because the grade is not classed among the cold-work hardness grades. We stock foil annealed, cold-rolled material with higher tensile strength that is rolled against specific orders and certified per batch.
The difference between Hastelloy C22 and C276 foils lies in the chromium-to-molybdenum balance. C22 foil runs 20.0 to 22.5% chromium, well above the 14.5 to 16.5% in C276, so it lasts longer in oxidising and mixed media. C276 carries more molybdenum and stays the pick for hot concentrated hydrochloric acid.
Yes, Hastelloy C22 foils weld cleanly at thin gauge using ERNiCrMo-10 filler. Because carbon is capped at 0.015%, the heat-affected zone resists carbide precipitation and welded foil assemblies serve without further treatment.
Yes, we slit Hastelloy C22 foils to any width between 3 mm and 2000 mm on our own lines, holding ±0.1 mm. Custom width slitting is the core of our foil service.
You can source Hastelloy C22 foils from us at Riddhi Siddhi Impex, a Mumbai-based manufacturer, supplier, and exporter since 2002. Send your size and gauge on call or WhatsApp and we'll provide a quote within 24 hours.
