| A350-LF3 |
This steel is one of special steel grade categorized tough at subzero steels.
| Standard Designation | Grade, Class, Type, Symbol or Name | Steel Number | UNS Number | Product
Form/Heat Treatment |
Yield Strength,
MPa |
Tensile Strength,
MPa |
Elongation, min, % | Other |
| ASTM A 350/A 350M-02b | LF3, Class 1 | — | K32025 | N, NT or QT | 260 | 485-655 | 22 | 20 J at -101°C |
| LF3, Class 2 | 27 J at -101°C |
Composition:
| C | Si | Mn | P | S | Cr | Mo | Ni | Others |
| 0.2 | 0.20-0.35 | 0.9 | 0.035 | 0.04 | 0.3 | 0.12 | 3.3-3.7 | Cu 0.40; Cb 0.02; V 0.03; Cr+Mo 0.32 |
Hot working:
Forging temperature range: 1100-850℃
Note: Heat to 1100 ℃. Do not forge below 850.
Heat treatment:
| Normalizing ℃ | Hardening temperature for quenching in Water ℃ | Tempering temperature ℃ |
| 850-880 | 830-850 | 500-650 |
Main application:
subzero application & flanges and fittings
Shape of product:
Round, flat, step shape, ring, disc, shaft, other shape depend on customer needs