| A350-LF2 |
| A350-LF2 |
ASTM A350 Grade LF2 is a general Carbon steel by moderate strength and impact toughness usually supplied this condition:
Normalized
Normalized and Tempered
Quench and Tempered condition.
| Standard Designation | Grade, Class, Type, Symbol or Name | Steel Number | UNS Number | Product Form/Heat Treatment | Yield Strength, min | Tensile Strength, min | Elongation, min, % | Other | |
| N/mm2 or MPa | N/mm2 or MPa | ||||||||
| ASTM A 350/A 350M-02b | LF2, Class 1 | — | K03011 | N, NT, or QT | 250 | 485-655 | 22 | 20 J at -46°C | |
| LF2, Class 2 | 27 J at -18°C |
Composition:
| %C | %Si | %Mn | %P | %S | Cr | Mo | Ni | V | Nb | Cr+Mo | Cu |
| Max0.3 | 0.15-0.3 | 0.6-1.35 | 0.035 | 0.05 | Max0.3 | max0.12 | Max0.4 | Max0.08 | Max0.2 | max0.32 | Max0.4 |
Hot working:
Forging temperature range: 1100-850℃
Note: Heat to 1200 ℃. Do not forge below 850..
Heat treatment:
| Normalizing ℃ | Hardening temperature for quenching in Water ℃ | Tempering temperature ℃ |
| 860-920 | 890-960 | 590 |
Main application:
Flanges and fittings, and applications which require cold temperature service where corrosion resistance is not important.
Shape of product:
Round, other shape depend on customer needs