A350-LF2 Class 1


A350 refers to several grades of carbon and low-alloy steel forged or ring-rolled flanges, forged fittings, and valves for use in low-temperature service and requiring notch toughness testing. A350-LF2 requires Charpy Impact testing at -50°F (-45°C) with 13 ft-lb (average of three specimens) 10 ft-lb (individual specimen) minimum.

Tensile Strength (KSI) Yield Strength (KSI)
70-95 36
Chemical Composition %
C Mn P S Si Ni Cr Mo Cu Cb V
A350 LF2 0.30 0.60-1.35 0.035 0.040 0.15-0.30 0.40 0.30 0.12 0.40 0.02 0.08