ASTM B424
Ni-Fe-Cr-Mo-Cu alloy (UNS N08825) plate, sheet and strip
The product specification for Alloy 825 (UNS N08825) and related Ni-Fe-Cr-Mo-Cu alloys in plate, sheet and strip. It sets chemistry, mechanical properties and the annealed condition for Inconel / Incoloy 825 flat products.
- Plate, sheet & strip
- ASME SB-424
- 1 grade supplied to it
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is ASTM B424?
ASTM B424 is the specification for Ni-Fe-Cr-Mo-Cu alloy plate, sheet and strip — most importantly Alloy 825 (UNS N08825), sold as Inconel 825 or Incoloy 825. It sets chemistry, mechanical properties and the annealed condition; general requirements for flat-rolled nickel alloys are in ASTM B906. ASME adopts it as SB-424.
ASTM B424 at a glance
| Products | Plate, sheet and strip |
|---|---|
| Alloys | UNS N08825 (Alloy 825) and related Ni-Fe-Cr-Mo-Cu alloys |
| General requirements | ASTM B906 |
| Condition | Annealed |
| ASME designation | SB-424 |
Alloy 825 to ASTM B424 — key requirements
Chemistry limits and annealed minimum properties for UNS N08825. Current standard verification pending. Numerical specification requirements are published only after the applicable current standard edition has been verified.
| Property | Requirement |
|---|---|
| Nickel | Pending current standard text |
| Chromium | Pending current standard text |
| Molybdenum | Pending current standard text |
| Copper | Pending current standard text |
| Titanium | Pending current standard text |
| Iron | Pending current standard text |
| Tensile strength, min | Pending current standard text |
| Yield strength 0.2%, min | Pending current standard text |
| Elongation, min | Pending current standard text |
Alloy 825 product specifications
B424 covers flat products only. Every other form has its own specification.
| Product | Specification |
|---|---|
| Sheet · plate · coil | ASTM B424 / SB-424 |
| Seamless pipe & tube | ASTM B423 |
| Welded pipe | ASTM B705 |
| Buttweld fittings | ASTM B366 WPNICMC |
| Flanges & forgings | ASTM B564 |
| Bar (feedstock for machined fasteners) | ASTM B425 — a bar specification, not a fastener specification |
How to write ASTM B424 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 B424 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) | B424-22 — 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 B424
The points that decide whether material to ASTM B424 is accepted at inspection.
- Material is normally supplied annealed; confirm the condition on your order.
- General requirements (tolerances, testing) come from ASTM B906.
- The same alloy is ordered as B423 for seamless pipe, B366 for fittings and B564 for flanges.
Grades and products we supply to ASTM B424
| Grade | Product | Designation on the certificate |
|---|---|---|
| Inconel 825 | Sheet · Plate · Coil | ASTM B424 |
How ASTM B424 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 B424
Same family
ASTM B424 — questions buyers ask
What is ASTM B424?
ASTM B424 is the specification for Ni-Fe-Cr-Mo-Cu alloy plate, sheet and strip — most importantly Alloy 825 (UNS N08825), sold as Inconel 825 or Incoloy 825. It sets chemistry, mechanical properties and the annealed condition; general requirements for flat-rolled nickel alloys are in ASTM B906. ASME adopts it as SB-424.
Does ASTM B424 cover Incoloy 825?
Yes. Incoloy 825 and Inconel 825 are trade names for the same alloy, UNS N08825, which is the main alloy in B424.
What is the difference between B424 and B906?
B424 sets the alloy chemistry and properties; B906 holds the general requirements — tolerances, finish and testing — for flat-rolled nickel-alloy products.
Which standard covers 825 pipe?
ASTM B423 for seamless pipe and tube, B705 for welded pipe.
Which grades do you supply to ASTM B424?
Inconel 825 — see the table on this page for the exact product and designation.
What is the current edition of ASTM B424?
The publisher's listing checked on 7 October 2026 shows B424-22 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