Hastelloy C22 CoilASTM B575 UNS N06022 · Manufacturer, stockist & exporter, India
Also sold as Alloy C-22 · UNS N06022 · W.Nr 2.4602 · Nicrofer 5621
Hastelloy C22 coil is supplied as full-width mother coil, slit coil or precision strip to ASTM B575. It is a nickel–chromium–molybdenum alloy with tungsten, chosen for mixed oxidising and reducing acids, and weld overlays. Kanak Steel & Engineering Co. supplies it with EN 10204 3.1 mill certificates from Mumbai to buyers across India, the Gulf, South-East Asia, South America, Europe, the UK and the USA.
- Stock & mill supply
- EN 10204 3.1 / 3.2
- PMI on every heat
- NACE MR0175 on request
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is Hastelloy C22 Coil?
Hastelloy C22 coil is a nickel–chromium–molybdenum alloy with tungsten supplied as coil to ASTM B575 (UNS N06022). Buyers specify it for mixed oxidising and reducing acids, and weld overlays. It is also sold as Alloy C-22, UNS N06022, W.Nr 2.4602.
- What it is
- Nickel–chromium–molybdenum alloy with tungsten
- Standard
- ASTM B575
- Forms
- Mother coil · slit coil · strip
- Density
- 8.69 g/cm³
- Finish
- Cold rolled, annealed & descaled
- Best at
- Mixed oxidising and reducing acids, and weld overlays
Hastelloy C22 Coil Specification & Sizes
| Material standard | ASTM B575 |
|---|---|
| Grade | Hastelloy C22 |
| Thickness | 0.1 mm to 6 mm, depending on mill route |
| Width | Mill width, or slit from 10 mm upwards |
| Coil weight & ID | To order — state maximum coil weight and inner diameter |
| Finish | Cold rolled, annealed & descaled; bright annealed on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
Standards on this page
Hastelloy C22 Coil: Slitting & Cut-to-Length Specification
C22 coil is bought for a production line, so state thickness, slit width, inner diameter and maximum coil weight with the grade.
| Standard | ASTM B575 |
|---|---|
| Thickness tolerance | Per ASTM B906 |
| Finish | Cold rolled, annealed & descaled · bright annealed on request |
| Temper | Annealed as standard; cold-rolled tempers by agreement |
ID, coil weight, edge, camber and interleaving: see the coil guide.
Hastelloy C22 Coil Chemical Composition
| Element | Weight % |
|---|---|
| Nickel | Balance |
| Chromium | 20.0 – 22.5 |
| Molybdenum | 12.5 – 14.5 |
| Iron | 2.0 – 6.0 |
| Tungsten | 2.5 – 3.5 |
| Cobalt | 2.5 max |
| Carbon | 0.015 max |
| Manganese | 0.50 max |
| Vanadium | 0.35 max |
| Silicon | 0.08 max |
Hastelloy C22 Coil Mechanical Properties
| Solution-annealed plate & sheet | Value |
|---|---|
| Tensile strength | 690 MPa · 100 ksi |
| Yield strength 0.2% | 310 MPa · 45 ksi |
| Elongation | 45% |
Density & Physical Properties
| Property | Value |
|---|---|
| Density | 8.69 g/cm³ |
| Melting range | 1357 – 1399 °C |
| Magnetic | Non-magnetic |
| PREN (approx.) | ≈ 65 |
Hastelloy C22 Equivalent Grades
Values follow ASTM B575 for UNS N06022. Always check against the edition named on your purchase order.
Six-digit Harmonized System heading (nickel alloy, chapter 75). Your country adds its own digits — confirm with your customs broker. All HS codes.
How to Verify Hastelloy C22 Coil with PMI
Positive material identification with a handheld XRF gun confirms the alloy on the piece itself, in seconds, before it is cut or welded. Hastelloy C22 is most often mixed up with Hastelloy C276 — the table shows which elements tell them apart.
Handheld XRF does not measure carbon or nitrogen; those come from the mill certificate or optical emission (OES) testing. We PMI-test nickel alloys as standard and any grade on request.
| Element | Hastelloy C22 | Hastelloy C276 |
|---|---|---|
| Nickel | Balance | Balance |
| Chromium | 20.0 – 22.5 | 14.5 – 16.5 |
| Molybdenum | 12.5 – 14.5 | 15.0 – 17.0 |
| Tungsten | 2.5 – 3.5 | 3.0 – 4.5 |
| Iron | 2.0 – 6.0 | 4.0 – 7.0 |
| Manganese | 0.50 max | 1.0 max |
Hastelloy C22 Coil Applications
Hastelloy C22 is specified when the cheaper grade will not survive the service but a higher alloy would be more than the job needs. These are the jobs our buyers use it for.
Hastelloy C22 Coil vs C276, 625 and 825
| Grade | Coil standard | PREN (approx.) | Pick it when |
|---|---|---|---|
| Inconel 825 | ASTM B424 | ≈ 31 | Sulphuric and phosphoric acid service, chloride stress-corrosion cracking and sour gas |
| Inconel 625 | ASTM B443 | ≈ 51 | Seawater, high strength and high temperature in one alloy |
| Hastelloy C22 | ASTM B575 | ≈ 65 | Mixed oxidising and reducing acids, and weld overlays |
| Hastelloy C276 | ASTM B575 | ≈ 68 | The most aggressive mixed acids, wet chlorine and hypochlorite |
PREN = Cr + 3.3 Mo + 16 N, from mid-range chemistry. A screening guide, not a substitute for corrosion data on your medium.
Hastelloy C22 Corrosion Resistance — Element by Element
Each alloying addition has a job. Knowing which one protects against your medium is the quickest way to judge whether C22 fits.
Higher chromium than C276 gives better resistance to oxidising acids and ferric/cupric chlorides.
Molybdenum keeps strong resistance in reducing acids.
Tungsten improves pitting and crevice resistance.
C22 filler is widely used to weld and overlay other alloys.
How your C22 coil order runs
- 01Enquiry review — we confirm size, standard edition and documents against your MR or drawing.
- 02Heat selection & PMI — the mill certificate is checked and material is PMI-tested before processing.
- 03Processing — cutting, machining or bevelling to your specification, with heat numbers marked.
- 04Inspection — your third-party inspector witnesses, or we share photos and test reports.
- 05Packing & dispatch — seaworthy packing from Nhava Sheva (JNPT), Mumbai, FOB or CIF, documents sent before the vessel sails.
Standards on this page
Welding & Fabricating Hastelloy C22 Coil
Hastelloy C22 welds by all common arc processes. A few points our buyers ask about:
| Matching filler | ERNiCrMo-10 (AWS A5.14) |
|---|---|
| Over-alloyed filler | ENiCrMo-10 electrode |
| Preheat | Not required; keep interpass temperature low |
| Cutting | Thermal or abrasive cutting; grind off heat-tinted edges before welding |
Follow your approved WPS; this is general guidance. See also C22 fittings and C22 flanges for the matching pipe-system parts.
How to Order Hastelloy C22 Coil: RFQ Checklist
Get an accurate quote the first time. Copy this list into your enquiry:
- Thickness and width
- Coil weight and inner diameter
- Finish and edge (mill or slit)
- Certificate type
- Delivery port and date
Hastelloy C22 coil for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiHastelloy C22 coil — questions buyers ask
Is Hastelloy C22 the same as Alloy C-22?
Yes. Alloy C-22, UNS N06022, W.Nr 2.4602 all refer to the same material, and coil is ordered to ASTM B575 whichever name is on the enquiry.
Can Hastelloy C22 coil be slit to width?
Yes. Coils can be slit to narrow widths for stamping, tube making and spring work; state width tolerance and coil weight on the enquiry.
What inner diameter do Hastelloy C22 coils have?
508 mm (20") and 610 mm (24") are the common IDs. Tell us your decoiler ID and maximum coil weight and we slit to suit.
Can I order Hastelloy C22 cut-to-length sheets from coil?
Yes. Coil can be levelled and cut to length; state length tolerance and flatness.
Hastelloy C22 or Inconel 825 — which should I choose?
Hastelloy C22 is chosen for mixed oxidising and reducing acids, and weld overlays. Inconel 825 is the step up when you need more pitting resistance or strength. See the comparison table on this page, or ask us with your process conditions.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026