ASTM B622
Seamless nickel and nickel-cobalt alloy (C276, C22) pipe and tube
Covers seamless nickel and nickel-cobalt alloy pipe and tube, including Hastelloy C276 (N10276) and C22 (N06022).
- Pipe & tube
- ASME SB-622
- 2 grades supplied to it
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is ASTM B622?
ASTM B622 is the specification for seamless nickel and nickel-cobalt alloy pipe and tube, including Hastelloy C276 (UNS N10276), C22 (N06022), C4 (N06455) and B-2 (N10665). Plate in the same alloys is ASTM B575; welded pipe is ASTM B619. ASME adopts it as SB-622.
ASTM B622 at a glance
| Alloys | N10276, N06022, N06455, N10665 and others |
|---|---|
| Products | Seamless pipe and tube |
| Condition | Solution annealed |
| ASME designation | SB-622 |
How to write ASTM B622 on a purchase order
Name the product, size, material specification and grade, the dimensional standard and the certificate. An example line:
Illustrative only — sizes, tests, inspection level and any project values come from your purchase specification.
ASTM B622 edition and verification status
Which edition we have confirmed, and what is still being checked before any numerical requirement is published here.
| Current edition (publisher listing) | B622-26 — checked 7 October 2026 |
|---|---|
| Full-text verification | In progress — numerical requirements are published here only after the current text has been reviewed |
| Edition on your order | The edition named in your purchase order or design code governs — confirm it with your enquiry |
What to know before ordering to ASTM B622
The points that decide whether material to ASTM B622 is accepted at inspection.
- Material is supplied solution-annealed.
- Welded pipe in these alloys is ASTM B619 / B626.
- Fittings are B366 WPHC276 / WPHC22 and flanges B564.
Grades and products we supply to ASTM B622
| Grade | Product | Designation on the certificate |
|---|---|---|
| Hastelloy C276 | Pipe & Tube | ASTM B622 |
| Hastelloy C276 | Pipe & Tube | ASTM B622 · B626 |
| Hastelloy C22 | Pipe & Tube | ASTM B622 |
| Hastelloy C22 | Pipe & Tube | ASTM B622 · B626 |
How ASTM B622 fits into an order
A purchase order line is only complete when it names the material standard, the dimensional standard and the inspection document. Miss one and the mill, the inspector and the buyer can each read the order differently.
Standards used with ASTM B622
Same family
ASTM B622 — questions buyers ask
What is ASTM B622?
ASTM B622 is the specification for seamless nickel and nickel-cobalt alloy pipe and tube, including Hastelloy C276 (UNS N10276), C22 (N06022), C4 (N06455) and B-2 (N10665). Plate in the same alloys is ASTM B575; welded pipe is ASTM B619. ASME adopts it as SB-622.
Which standard covers Hastelloy C276 seamless pipe?
ASTM B622 (ASME SB-622), UNS N10276.
Which grades do you supply to ASTM B622?
Hastelloy C276, Hastelloy C22 — see the table on this page for the exact product and designation.
What is the difference between ASTM B622 and ASME SB-622?
ASME SB-622 is the ASME Boiler and Pressure Vessel Code (Section II) adoption of ASTM B622. The technical requirements are usually identical to a specific ASTM edition; pressure-equipment codes call for the ASME designation, and most mill certificates show both.
What is the current edition of ASTM B622?
The publisher's listing checked on 7 October 2026 shows B622-26 as the current edition. The edition that governs an order is the one named in the purchase order or design code. Full-text review of the current edition is in progress, so numerical requirements are not published on this page yet.
Do you supply certificates to this standard?
Yes. Material is supplied with mill test certificates to EN 10204 3.1 showing the standard, grade and heat number; 3.2 with third-party inspection on request.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026