Valve Material Reference
ASTM A350 Grade LF2 Valve
Low Temperature Forged Carbon Steel LF2ASTM A350 Grade LF2 is the standard forged carbon-manganese steel for flanges, fittings, and valve components in low-temperature service down to -46°C (-51°F).
Form
Forged
Max Temp
+345°C (+650°F)
Min Temp
−46°C (−51°F)
Category
Carbon Steel
Chemical Composition — ASTM A350 Grade LF2
Temperature Range
−46°C to +345°C (−51°F to +650°F)
Maximum Temperature
+345°C (+650°F)
Minimum Temperature
−46°C (−51°F)
Equivalent Grades — ASTM A350 Grade LF2
| Standard | Equivalent Grade |
|---|---|
| ASTM | A350 LF2 |
| ASME | SA-350 LF2 |
| EN | P275NL1 / 1.0488 (approx) |
Suitable Services
LNG satellite and transfer stations
LPG storage, loading, and transfer systems
Refrigeration piping and CO₂ service
Cold-climate installations (Arctic pipeline, North Sea topside)
Ethylene and propylene plants (cold sections)
Not Suitable For
Service below −46°C — use LF3 (to −73°C) or SS316 for colder
Corrosive media without protective coatings
Valve Body Applications
Forged valve bodies and bonnets for cryogenic and cold-climate service
LNG plant forged valve components
LPG and propane handling valve flanges and end connections
Ethylene and propylene cold section valve bodies
Trim Applications
Stem material in low-temperature service; trim typically SS316
Typical Valve Types in ASTM A350 Grade LF2
Forged gate valves: low-temperature pipeline isolation
Forged ball valves: LPG and LNG service
Forged globe valves: cold utility service
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Technical Reference
Valve Selection · 11 min read
Cryogenic Valve Selection for LNG, Oxygen and Ethylene Service
Cryogenic valves for LNG, liquid oxygen, liquid nitrogen, and ethylene service must handle temperatures down to -196°C without embrittlement, leakage, or icing of the stem seal. This guide covers cryogenic valve material selection, extended bonnet design rationale, BS 6364 and API 6D cryogenic requirements, and how to specify and source cryogenic valves for LNG terminals and industrial gas plants.
All Valve Materials
Need ASTM A350 Grade LF2 Valves?
We supply ASTM A350 Grade LF2 (Low Temperature Forged Carbon Steel LF2) gate valves, globe valves, ball valves, check valves, and more. Full certification documentation — EN 10204 3.1/3.2 MTCs, hydro test certs — as standard.