ASTM A350
Carbon and low-alloy steel forgings for low-temperature piping components
Covers carbon and low-alloy steel forgings for low-temperature piping components, with notch-toughness testing — LF2 is the common grade.
- Flanges & forgings
- ASME SA-350
- 1 grade in stock range
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What to know before ordering to ASTM A350
The points that decide whether material to ASTM A350 is accepted at inspection.
- LF2 Class 1 is impact-tested at −46 °C.
- A350 LF2 flanges match A333 Gr 6 pipe.
- Dimensions follow ASME B16.5 or B16.47.
Grades and products we supply to ASTM A350
| Grade | Product | Designation on the certificate |
|---|---|---|
| ASTM A333 Gr 6 | Fittings · Flanges | ASTM A350 LF2 |
How ASTM A350 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.
ASTM A350 — questions buyers ask
What does ASTM A350 cover?
Covers carbon and low-alloy steel forgings for low-temperature piping components, with notch-toughness testing — LF2 is the common grade.
Which grades do you supply to ASTM A350?
ASTM A333 Gr 6 — see the table on this page for the exact product and designation.
What is the difference between ASTM A350 and ASME SA-350?
ASME SA-350 is the ASME Boiler and Pressure Vessel Code (Section II) adoption of ASTM A350. 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