ASTM A350 LF2 is the premier low-temperature carbon steel grade for cryogenic service. This Slip-On flange is engineered for environments where notch toughness is vital to prevent brittle fracture. While physically similar to A105, LF2 undergoes strict heat treatment like Normalizing or Quenching and Tempering to ensure mechanical integrity at temperatures reaching -46°C. It is a standard choice for Arctic pipelines, LNG facilities, and industrial gas systems requiring reliable forged performance.
technical attributes
Material Grade: ASTM A350 LF2 Class 1
Standard: ASME B16.5
Flange Type: Slip-On SO
Material Category: Low-Temp Carbon Steel
Pressure Class: 150 to 2500 LBS
Size Range: NPS 1/2 to NPS 24
Impact Test Temp: -46 Degrees Celsius
Impact Energy: Min 20 Joules Average
Heat Treatment: Normalized or Quenched
Carbon Content: Max 0.30 percent
Manganese Content: 0.60 to 1.35 percent
Yield Strength: Min 250 MPa
Tensile Strength: 485 to 655 MPa
Hardness: Max 197 HBW
Facing Type: Raised Face RF or RTJ
Manufacturing: Forged and Machined
Connection: Double Fillet Weld
Certification: EN 10204 3.1 with Impact
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