ASTM A358
Electric-fusion-welded austenitic stainless pipe for high temperature
Covers electric-fusion-welded austenitic stainless steel pipe, typically in larger diameters, for high-temperature and corrosive service.
- Pipe & tube
- ASME SA-358
- 6 grades in stock range
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What to know before ordering to ASTM A358
The points that decide whether material to ASTM A358 is accepted at inspection.
- Five classes (1 to 5) define whether filler metal is used and how much of the weld is radiographed.
- Class 1 — double-welded with filler and 100% radiography — is the most common in process plant.
- Use it when pipe sizes go beyond what A312 welded pipe mills produce.
Grades and products we supply to ASTM A358
| Grade | Product | Designation on the certificate |
|---|---|---|
| SS 304 | Pipe & Tube | ASTM A312 · A358 |
| SS 304L | Pipe & Tube | ASTM A312 · A358 |
| SS 310 / 310S | Pipe & Tube | ASTM A312 · A358 |
| SS 316 / 316L | Pipe & Tube | ASTM A312 · A358 |
| SS 321 | Pipe & Tube | ASTM A312 · A358 |
| SS 347 | Pipe & Tube | ASTM A312 · A358 |
How ASTM A358 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 A358 — questions buyers ask
What does ASTM A358 cover?
Covers electric-fusion-welded austenitic stainless steel pipe, typically in larger diameters, for high-temperature and corrosive service.
Which grades do you supply to ASTM A358?
SS 304, SS 304L, SS 310 / 310S, SS 316 / 316L, SS 321, SS 347 — see the table on this page for the exact product and designation.
What is the difference between ASTM A358 and ASME SA-358?
ASME SA-358 is the ASME Boiler and Pressure Vessel Code (Section II) adoption of ASTM A358. 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