ASTM B443
Ni-Cr-Mo-Nb alloy (UNS N06625) plate, sheet and strip
The product specification for Alloy 625 (UNS N06625) plate, sheet and strip, in Grade 1 (annealed) and Grade 2 (solution-annealed) conditions.
- Plate, sheet & strip
- ASME SB-443
- 1 grade in stock range
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What to know before ordering to ASTM B443
The points that decide whether material to ASTM B443 is accepted at inspection.
- Grade 1 is the usual choice for corrosion service up to about 600 °C; Grade 2 is for higher-temperature creep service.
- Specify the grade — the two have different minimum strengths.
- Pipe in the same alloy is B444 (seamless) or B705 (welded).
Grades and products we supply to ASTM B443
| Grade | Product | Designation on the certificate |
|---|---|---|
| Inconel 625 | Sheet · Plate · Coil | ASTM B443 |
How ASTM B443 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.
Related standards
ASTM B443 — questions buyers ask
What does ASTM B443 cover?
The product specification for Alloy 625 (UNS N06625) plate, sheet and strip, in Grade 1 (annealed) and Grade 2 (solution-annealed) conditions.
Which grades do you supply to ASTM B443?
Inconel 625 — see the table on this page for the exact product and designation.
What is the difference between ASTM B443 and ASME SB-443?
ASME SB-443 is the ASME Boiler and Pressure Vessel Code (Section II) adoption of ASTM B443. 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.
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