ASTM B705
Welded nickel-alloy (625, 825) pipe
Covers welded nickel-alloy pipe in alloys including 625 (N06625) and 825 (N08825), in several classes that define cold work and heat treatment.
- Pipe & tube
- ASME SB-705
- 2 grades supplied to it
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is ASTM B705?
ASTM B705 is the specification for welded nickel-alloy pipe in grades such as Alloy 625 (N06625) and Alloy 825 (N08825), made from flat-rolled material by automatic welding. It is the welded counterpart to seamless specifications ASTM B444 (625) and ASTM B423 (825). ASME adopts it as SB-705.
ASTM B705 at a glance
| Products | Welded pipe |
|---|---|
| Alloys | N06625, N08825 and other nickel alloys |
| Use | Larger and lighter-wall nickel-alloy lines where seamless is not required |
| ASME designation | SB-705 |
How to write ASTM B705 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 B705 edition and verification status
Which edition we have confirmed, and what is still being checked before any numerical requirement is published here.
| Current edition | Not yet confirmed against the publisher listing |
|---|---|
| Full-text verification | In progress — numerical requirements are not published on this page |
| 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 B705
The points that decide whether material to ASTM B705 is accepted at inspection.
- Classes differ in cold-work and examination requirements; state the class on the order.
- Welded pipe is the economical choice in larger sizes and thinner walls.
- For seamless pipe order B423 (825) or B444 (625).
Grades and products we supply to ASTM B705
| Grade | Product | Designation on the certificate |
|---|---|---|
| Inconel 825 | Pipe & Tube | ASTM B705 |
| Inconel 625 | Pipe & Tube | ASTM B705 |
How ASTM B705 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 B705
Same family
ASTM B705 — questions buyers ask
What is ASTM B705?
ASTM B705 is the specification for welded nickel-alloy pipe in grades such as Alloy 625 (N06625) and Alloy 825 (N08825), made from flat-rolled material by automatic welding. It is the welded counterpart to seamless specifications ASTM B444 (625) and ASTM B423 (825). ASME adopts it as SB-705.
Is welded 825 pipe acceptable in pressure piping?
Where the piping class allows welded pipe — check the line class and the weld joint factor in your design code.
Which grades do you supply to ASTM B705?
Inconel 825, Inconel 625 — see the table on this page for the exact product and designation.
What is the difference between ASTM B705 and ASME SB-705?
ASME SB-705 is the ASME Boiler and Pressure Vessel Code (Section II) adoption of ASTM B705. 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