ASME SA-105/SA-350 Grade LF2
Description
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 |
Standards
Typical standards for SA-105/SA-350 Grade LF2 Steel Components
| ASME SA-105 |
| ASME SA-350 Grade LF2 |