ASTM B127
Ni-Cu alloy (Monel 400) plate, sheet and strip
Covers nickel-copper alloy (Monel 400, UNS N04400) plate, sheet and strip, hot-rolled or cold-rolled.
- Plate, sheet & strip
- ASME SB-127
- 1 grade supplied to it
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is ASTM B127?
ASTM B127 is the specification for nickel-copper alloy (UNS N04400 — Monel 400) plate, sheet and strip. Alloy 400 is chosen for seawater, brackish water, hydrofluoric acid and alkalis. General requirements are in ASTM B906. ASME adopts it as SB-127.
ASTM B127 at a glance
| Alloy | UNS N04400 (Alloy 400, Monel 400) |
|---|---|
| Products | Plate, sheet and strip |
| Conditions | Annealed; hot-rolled plate also as-rolled |
| ASME designation | SB-127 |
Monel 400 specifications by product
| Product | Specification |
|---|---|
| Sheet & plate | ASTM B127 |
| Seamless pipe & tube | ASTM B165 |
| Fittings | ASTM B366 WPNC |
| Flanges | ASTM B564 |
| Bar | ASTM B164 · bolts and studs to ASTM F468 (N04400) where specified |
How to write ASTM B127 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 B127 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) | B127-25 — 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 B127
The points that decide whether material to ASTM B127 is accepted at inspection.
- Tempers range from annealed to quarter-hard and half-hard for sheet and strip.
- Monel 400 is the standard choice for seawater, brackish water and hydrofluoric acid service.
- Seamless pipe in the same alloy is ASTM B165.
How ASTM B127 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 B127
Same family
ASTM B127 — questions buyers ask
What is ASTM B127?
ASTM B127 is the specification for nickel-copper alloy (UNS N04400 — Monel 400) plate, sheet and strip. Alloy 400 is chosen for seawater, brackish water, hydrofluoric acid and alkalis. General requirements are in ASTM B906. ASME adopts it as SB-127.
Is Monel 400 the same as Alloy 400?
Yes — Monel is the trade name for UNS N04400.
Where is Monel 400 used?
Seawater and brackish-water equipment, hydrofluoric acid service and some alkali handling.
Which grades do you supply to ASTM B127?
Monel 400 — see the table on this page for the exact product and designation.
What is the difference between ASTM B127 and ASME SB-127?
ASME SB-127 is the ASME Boiler and Pressure Vessel Code (Section II) adoption of ASTM B127. 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 B127?
The publisher's listing checked on 7 October 2026 shows B127-25 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