ASTM A333 / SA333 Gr 11 Low Temperature Steel Pipe
ASTM A333 / SA333 Grade 11 is a high-nickel low-temperature alloy steel pipe designed for extremely cold service conditions. With enhanced nickel content compared to Grade 10, it provides exceptional toughness, ductility, and impact resistance at cryogenic temperatures, making it ideal for LNG facilities, offshore pipelines, petrochemical plants, and chemical processing units.
Key Features
- High nickel alloy content for superior low-temperature performance
- Excellent impact strength at sub-zero temperatures
- Available in seamless and welded forms
- Good fabricability, weldability, and toughness
- Widely used in cryogenic storage, LNG pipelines, and offshore applications
ASTM A333 / SA333 Gr 11 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.20 max |
| Manganese (Mn) | 0.30 – 0.80 |
| Phosphorus (P) | 0.025 max |
| Sulfur (S) | 0.025 max |
| Silicon (Si) | 0.15 – 0.35 |
| Nickel (Ni) | 10.5 – 11.5 |
ASTM A333 / SA333 Gr 11 Mechanical Properties
| Property | Requirement |
|---|---|
| Tensile Strength (MPa) | 585 min |
| Yield Strength (MPa) | 415 min |
| Elongation (%) | 22 min |
| Impact Test (–196°C) | Required (Charpy V-Notch) |
Heat Treatment
- Normalized
- Quenched & Tempered
- Normalized & Tempered
Applications
- LNG pipelines and storage tanks
- Cryogenic heat exchangers and process piping
- Offshore oil & gas pipelines
- Petrochemical and chemical plants
- Marine and shipbuilding applications
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