ASTM B165
Ni-Cu alloy (Monel 400) seamless pipe and tube
Covers nickel-copper alloy (Monel 400, UNS N04400) seamless pipe and tube.
- Pipe & tube
- ASME SB-165
- 1 grade supplied to it
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is ASTM B165?
ASTM B165 is the specification for seamless nickel-copper alloy (UNS N04400 — Monel 400) pipe and tube. It is used for seawater, brackish-water and hydrofluoric-acid lines. Plate in the same alloy is ASTM B127. ASME adopts it as SB-165.
ASTM B165 at a glance
| Alloy | UNS N04400 (Monel 400) |
|---|---|
| Products | Seamless pipe and tube |
| Conditions | Annealed or stress relieved |
| ASME designation | SB-165 |
Monel 400 by product
| Product | Specification |
|---|---|
| Pipe & tube | ASTM B165 |
| Plate & sheet | ASTM B127 |
| Fittings | ASTM B366 WPNC |
| Flanges | ASTM B564 |
How to write ASTM B165 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 B165 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) | B165-26 — 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 B165
The points that decide whether material to ASTM B165 is accepted at inspection.
- Tempers are annealed or stress-relieved; specify the one you need.
- Commonly used for seawater and HF acid lines.
- Fittings are B366 WPNC and flanges B564.
Grades and products we supply to ASTM B165
| Grade | Product | Designation on the certificate |
|---|---|---|
| Monel 400 | Pipe & Tube | ASTM B165 |
| Monel 400 | Pipe & Tube | ASTM B163 · B165 |
How ASTM B165 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 B165
Same family
ASTM B165 — questions buyers ask
What is ASTM B165?
ASTM B165 is the specification for seamless nickel-copper alloy (UNS N04400 — Monel 400) pipe and tube. It is used for seawater, brackish-water and hydrofluoric-acid lines. Plate in the same alloy is ASTM B127. ASME adopts it as SB-165.
Which standard covers Monel 400 pipe?
ASTM B165 (ASME SB-165), UNS N04400.
Which grades do you supply to ASTM B165?
Monel 400 — see the table on this page for the exact product and designation.
What is the difference between ASTM B165 and ASME SB-165?
ASME SB-165 is the ASME Boiler and Pressure Vessel Code (Section II) adoption of ASTM B165. 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 B165?
The publisher's listing checked on 7 October 2026 shows B165-26 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