Hastelloy C22 Sheets, Plates and Strip for Mixed-Acid and Chloride Service
Hastelloy C22 sheets and plates are nickel-chromium-molybdenum-tungsten alloy UNS N06022 (W.Nr 2.4602) ordered to ASTM B575 / ASME SB575. The B575 minimums (690 MPa tensile, 310 MPa yield, 45% elongation) are the same for sheet and plate, so what you need to state is the product, thickness, size, finish and any extra tests.
Dinesh Tube India is a Mumbai supplier and dealer of Hastelloy C22 cold-rolled sheet, hot-rolled plate, strip and coil, with plate cut to size for tubesheets on request and EN 10204 3.1 mill test certificates.
What Is Hastelloy C22 and Why Is It Used?
Hastelloy C-22 is a low-carbon nickel alloy with about 21% chromium, 13.5% molybdenum, 3% tungsten and 2 – 6% iron. The chromium gives resistance to oxidising media such as nitric acid, ferric and cupric chlorides and wet chlorine; the molybdenum and tungsten give resistance to reducing acids and to chloride pitting, crevice corrosion and stress corrosion cracking. Its low carbon and silicon limit grain-boundary precipitation in weld heat-affected zones, so it is normally used in the as-welded condition.
The material is supplied solution annealed (typically around 1120 °C followed by rapid cooling). It can be cold formed, but it work-hardens quickly, so heavy forming may need intermediate annealing.
Sheet, Plate or Tubesheet: Which Do You Need?
Minimums per ASTM B575 for UNS N06022 in the solution-annealed condition; product definitions per ASTM B906. Check the edition named in your order. Heavy tubesheets are sometimes ordered as ASTM B564 N06022 forgings instead of plate.
Typical values published by producers show thin sheet testing stronger than plate. Order to the B575 minimums; actual values are reported on the mill test certificate.
Hastelloy C22 or C276: Which Plate Do You Need?
Both grades are ordered to the same specification, but they are different alloys. Do not substitute one for the other without the purchaser’s approval. See our Hastelloy C276 sheets and plates.
How to Order Hastelloy C22 Plate for Tubesheets
Sizes, Finishes and Cut-to-Size
Which Tests and Certification Apply?
Chemical Composition of Hastelloy C22 (UNS N06022, %)
Per ASTM B575 for UNS N06022. Nickel is the balance (about 56%).
Mechanical Properties of Hastelloy C22 Sheet and Plate (ASTM B575)
Physical properties: density 8.69 g/cm³, melting range about 1357 – 1399 °C.
Hastelloy C22 Equivalent Grades
Equivalents are the nearest national grades, not identical specifications; confirm the required standard before ordering. Hastelloy® and C-22® are registered trademarks of Haynes International, Inc. Dinesh Tube India is an independent supplier and is not affiliated with the trademark owner.
Hastelloy C22 Sheet & Plate Specification
Specifications
Grade
Cold-Rolled Sheet
Hot-Rolled Plate
Forms
Delivery Condition
Width × Length
Certification
Forms of Hastelloy C22 Flat Products
Hastelloy C22 Sheets
Hastelloy C22 Coils
Hastelloy C22 Strips
How to Order Hastelloy C22 Plate: RFQ Example
A complete enquiry lets us quote in one round. Replace the values with your own.
Send your Hastelloy C22 sheet or plate RFQ in this format to kamlesh@dineshtube-india.com, call or WhatsApp +91 83559 10913, or send an enquiry.
Where Are Hastelloy C22 Sheets and Plates Used?
Other Hastelloy flat products: C276, B2 and B3 sheets and plates, and the Hastelloy sheets and plates overview. Hastelloy pipes, tubes, pipe fittings and flanges are also available.
Hastelloy C22 Sheets & Plates: FAQs
What is Hastelloy C22?
Hastelloy C-22 is a nickel-chromium-molybdenum-tungsten alloy, UNS N06022 (W.Nr 2.4602), with about 21% chromium, 13.5% molybdenum and 3% tungsten. The high chromium resists oxidising media and the molybdenum and tungsten resist reducing media, so it is used for mixed acids, wet chlorine, chloride pitting and crevice corrosion. Sheet, plate and strip are ordered to ASTM B575 / ASME SB575.
Are Hastelloy C22 sheet and plate properties different?
The ASTM B575 minimums are the same for sheet, strip and plate in the solution-annealed condition: 690 MPa tensile, 310 MPa yield and 45% elongation. Actual results differ: thin cold-rolled sheet usually tests stronger than hot-rolled plate. Under the general nickel-alloy flat product rules (ASTM B906), plate is 4.76 mm (3/16") and thicker; thinner material is sheet or strip.
What is the difference between Hastelloy C22 and C276?
C-22 has more chromium (20.0 – 22.5% against 14.5 – 16.5%) and less molybdenum (12.5 – 14.5% against 15.0 – 17.0%) than C-276. C-22 is generally better in oxidising and mixed oxidising-reducing media; C-276 is often preferred in strongly reducing acids. They are different UNS grades (N06022 and N10276) and are not interchangeable without the purchaser’s approval.
Do you supply Hastelloy C22 plate for tubesheets?
Yes. Tubesheets are usually cut from B575 plate, or made from ASTM B564 N06022 forgings for heavy sections. Give the finished thickness and machining allowance, the disc diameter or cut size, flatness and thickness tolerance, and whether ultrasonic testing is required. Tube-hole drilling is done by your fabricator.
Do you supply Hastelloy C22 strip and coil?
Yes, cold-rolled strip and coil in UNS N06022 are also ordered to ASTM B575. Give the thickness, slit width, coil or cut length, finish and quantity.
Is Hastelloy C22 magnetic?
No. In the solution-annealed condition C-22 is a fully austenitic nickel alloy and is non-magnetic.
Which filler metal is used to weld Hastelloy C22?
The matching filler is ERNiCrMo-10 (AWS A5.14) for TIG and MIG welding, and ENiCrMo-10 (AWS A5.11) covered electrodes. Follow your qualified welding procedure.
What should a Hastelloy C22 sheet or plate enquiry include?
Give the specification (ASTM B575 / ASME SB575 UNS N06022), product (sheet, plate, strip or coil), thickness, width, length or cut size, finish, quantity, tests (PMI, ASTM G28, ultrasonic for plate if required), documents (EN 10204 3.1, 3.2 or third-party inspection) and the delivery date.
Export Destinations for Hastelloy C22 Sheets & Plates
We supply Hastelloy C22 sheets and plates from Mumbai within India and export to fabricators, EPC contractors and plants in the Middle East, Africa, Asia, Europe and the Americas. Tell us your destination port when you enquire.