Hastelloy C22 — Sheet, Plate, Coil, Pipe & Tube & Fittings
Also sold as Alloy C-22 · UNS N06022 · W.Nr 2.4602 · Nicrofer 5621
Hastelloy C22 is a nickel–chromium–molybdenum alloy with tungsten, chosen for mixed oxidising and reducing acids, and weld overlays. We supply it as sheet, plate, coil, pipe & tube, fittings, flanges, fasteners, with EN 10204 3.1 certificates, from Mumbai to India, the Gulf, South-East Asia, South America, Europe, the UK and the USA.
- UNS N06022
- W.Nr 2.4602
- PREN ≈ 65
- ρ 8.69 g/cm³
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
Hastelloy C22 Products
Hastelloy C22 Names, Designations & Composition
Hastelloy C22 is one alloy sold under several names. Its UNS number is N06022, the European material number is W.Nr 2.4602 and the EN name is NiCr21Mo14W. The chart on the right shows the specified range of each main alloying element; the balance is the base metal.
Hastelloy C22 Specifications by Product — Which Standard Applies?
The material standard changes with the product form. This is the table buyers ask for most.
| Product | Material standard | Dimensions |
|---|---|---|
| Hastelloy C22 sheet | ASTM B575 | ASTM A480 / B906 |
| Hastelloy C22 plate | ASTM B575 | ASTM A480 / B906 / A20 |
| Hastelloy C22 coil | ASTM B575 | ASTM A480 |
| Hastelloy C22 pipe & tube | ASTM B622 · ASTM B619 | ASME B36.19 / B36.10 |
| Hastelloy C22 fittings | ASTM B366 WPHC22 · ASTM B462 / B564 | ASME B16.9 · B16.11 |
| Hastelloy C22 flanges | ASTM B462 / B564 | ASME B16.5 · B16.47 |
| Hastelloy C22 fasteners | May be machined from ASTM B574 bar (UNS N06022), where applicable; finished fastener requirements are to the purchase specification or project drawing | ASME B18.2.1 · B18.2.2 |
Hastelloy C22 Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Nickel | As specified |
| Chromium | As specified |
| Molybdenum | As specified |
| Iron | As specified |
| Tungsten | As specified |
| Cobalt | As specified |
| Carbon | As specified |
| Manganese | As specified |
| Vanadium | As specified |
| Silicon | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification to be verified: ASTM B575 for UNS N06022.
Hastelloy C22 Mechanical Properties
Under technical review for TDS.
| Property | Current requirement |
|---|---|
| Tensile strength | As specified |
| Yield strength 0.2% | As specified |
| Elongation | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification and condition to be verified: ASTM B575 for UNS N06022 — Solution-annealed plate & sheet.
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
Hastelloy C22 Corrosion Resistance — What Each Element Does
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.
Hastelloy C22 vs C276, 625 and 825
| Grade | PREN (approx.) | Pick it for |
|---|---|---|
| Inconel 825 | ≈ 31 | Sulphuric and phosphoric acid service, chloride stress-corrosion cracking and sour gas |
| Inconel 625 | ≈ 51 | Seawater, high strength and high temperature in one alloy |
| Hastelloy C22 | ≈ 65 | Mixed oxidising and reducing acids, and weld overlays |
| Hastelloy C276 | ≈ 68 | The most aggressive mixed acids, wet chlorine and hypochlorite |
Welding Hastelloy C22
| Matching filler | ERNiCrMo-10 (AWS A5.14) |
|---|---|
| Also used | ENiCrMo-10 electrode |
Hastelloy C22 for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiHastelloy C22 — questions buyers ask
What is Hastelloy C22?
Hastelloy C22 is a nickel–chromium–molybdenum alloy with tungsten. It is chosen for mixed oxidising and reducing acids, and weld overlays.
Which standards cover Hastelloy C22 products?
Sheet: ASTM B575; Plate: ASTM B575; Coil: ASTM B575; Pipe & Tube: ASTM B622 · ASTM B619; Fittings: ASTM B366 WPHC22 · ASTM B462 / B564; Flanges: ASTM B462 / B564; Fasteners: May be machined from ASTM B574 bar (UNS N06022), where applicable; finished fastener requirements are to the purchase specification or project drawing. Always name the standard and edition on your order.
What is the UNS number of Hastelloy C22?
UNS N06022, with the European material number W.Nr 2.4602.
What is the density of Hastelloy C22?
8.69 g/cm³ — use it to calculate weights: plate kg = L(m) × W(m) × t(mm) × 8.69.
Hastelloy C22 or Inconel 825?
Hastelloy C22 suits mixed oxidising and reducing acids, and weld overlays; Inconel 825 is the step up for sulphuric and phosphoric acid service, chloride stress-corrosion cracking and sour gas.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026