ASTM A350 — Carbon and low-alloy steel forgings requiring notch toughness testing for piping components
ASTM A350 covers carbon and low-alloy steel forged flanges, fittings and valves for low-temperature service, with mandatory Charpy impact testing. Grades include LF1, LF2 (Class 1 at −46 °C, Class 2 at −18 °C), LF3 (3.5 % Ni, −101 °C), LF6, LF9 and LF787.
ASTM A350 at a glance
| Standard | ASTM A350 |
|---|---|
| Issued by | ASTM / ASME (SA-350) |
| Product form | Forged flanges and fittings |
| Typical use | Low-temperature flanges and forged fittings |
| Grades on this site | 2 |
Equivalent and related standards
ASTM A350 grades — chemistry and mechanical properties
| Grade | UNS | C% | Cr% | Ni% | Mo% | YieldMPa min | TensileMPa min |
|---|---|---|---|---|---|---|---|
| ASTM A350 LF2 Cl.1 | K03011 | 0.30 max | 0.30 max | 0.40 max | 0.12 max | 250 | 485 |
| ASTM A350 LF3 Cl.1 | K32025 | 0.20 max | 0.30 max | 3.3–3.7 | 0.12 max | 260 | 485 |
Reference information compiled from the published standard for convenience. It does not replace the current edition of the governing standard, which takes precedence. Verify critical dimensions and properties before design, purchase or fabrication. Teshi Engineers & Sales Promoters (P) Ltd accepts no liability for errors or omissions.
FAQ
ASTM A350: common questions
Which grades does ASTM A350 cover?
On this site: ASTM A350 LF2 Cl.1, ASTM A350 LF3 Cl.1. Open any grade for its full chemical composition, mechanical properties and PDF data sheet.
Does Teshi Group supply material to ASTM A350?
Teshi Group manufactures flanges, fittings, fasteners and valves, and supplies pipes and plates, to ASTM / ASME specifications and to equivalent EN, JIS, GB and IS standards on request, with EN 10204 3.1 certificates. Send your requirement to info@teshigroup.com.
Ready to build to spec?
Share your drawing, bill of materials or technical requirements with the Teshi team.