ASME SA-105/SA-350 Grade LF2


This grade is used primarily for steel piping components for low temperature, ambient and higher temperature service as required by ASME specification SA-105 (Specification for Carbon Steel Forgings for Piping Applications) and ASME Specification SA-350 (Specification for Carbon and Low-Alloy Steel Forgings, Requiring Notch Toughness Testing for Piping Components).

Chemical Composition

Chemical Composition (wt%) limits of ASME SA-105/SA-350 Grade LF2 steel*

Carbon 0.30 Molybdenum 0.12
Manganese 0.60-1.05 Phosphorus 0.035
Silicon 0.15-0.30 Sulfur 0.040
Copper 0.40 Vanadium 0.08
Chromium 0.30 Columbium 0.02
Nickel 0.40    

*Maximum, unless range is indicated

Physical Properties

Physical properties for SA-105/SA-350 Grade LF2 Steel Components

Density, lb/in3 0.284
Modulus of Elasticity, psi 29 x 106
Coefficient of Thermal Expansion, 68-212˚F, /˚F 6.39 x 10-6
Thermal Conductivity, Btu/ft hr ˚F 30.0
Specific Heat, Btu/lb ˚F 0.116
Electrical Resistivity, Microhm-in 6.42

Mechanical Properties

Mechanical property requirements for annealed bar product as specified in ASTM

Yield Strength, min (ksi) 36
Tensile Strength, min (ksi) 70-95
Elongation, min (%) 22


Typical standards for SA-105/SA-350 Grade LF2 Steel Components

ASME SA-350 Grade LF2