5754 Aluminum Sheet for LNG Storage Tanks: Cryogenic Applications | Gwangyang Aluminum
Introduction: The Material Behind Safe LNG Storage
Liquefied Natural Gas (LNG) is stored and transported at temperatures as low as -162°C, a cryogenic environment that causes most traditional structural materials—including many steels—to become dangerously brittle and prone to catastrophic failure . For decades, specialized aluminum alloys from the 5xxx series have been the industry's trusted solution for LNG containment.
5754 aluminum sheet has emerged as a compelling choice for a wide range of LNG storage, piping, and support applications where moderate strength is balanced with superior corrosion resistance and processing flexibility. At Gwangyang Aluminum (GYAL), we produce premium 5754 aluminum plate specifically engineered for cryogenic service in the LNG industry, backed by IATF 16949 certified quality and comprehensive material certifications .
Why 5754 Aluminum Excels in Cryogenic LNG Applications
1. Exceptional Cryogenic Toughness
The fundamental reason 5754 aluminum performs exceptionally well in cryogenic environments lies in the behavior of Al-Mg (5000 series) alloys at low temperatures. Unlike many materials that become brittle as temperatures drop, 5754 aluminum increases in strength while maintaining ductility at cryogenic temperatures .
5754 aluminum has been validated for service at temperatures as low as -196°C, making it fully suitable for LNG storage at -162°C and for even more extreme cryogenic applications . Through its optimized composition—magnesium content of 2.6-3.6% as the primary alloying element—5754 maintains high toughness and tensile strength even at ultra-low temperatures .
2. Superior Corrosion Resistance
5754 aluminum offers excellent corrosion resistance, especially to seawater and industrial polluted atmospheres . The alloy naturally forms a dense oxide film that resists chlorides and sulfides, eliminating the need for coatings in marine LNG terminals . This corrosion resistance ensures long-term reliability of LNG storage and transport infrastructure.
3. Excellent Weldability for Large Tank Fabrication
LNG storage tanks are massive structures requiring extensive welding. 5754 aluminum offers excellent weldability with conventional methods, enabling large tank fabrication and on-site assembly . The alloy maintains good mechanical properties in the heat-affected zone, ensuring reliable, leak-proof construction of cryogenic containment systems.
4. Significant Weight Reduction
With a density of approximately 2.66-2.71 g/cm³, 5754 aluminum is roughly one-third the weight of steel . This weight reduction improves transport efficiency and reduces structural loads in LNG carrier applications .
5. Excellent Formability
5754 aluminum offers excellent stamping and forming capabilities, supporting modular design and complex tank geometries . The alloy provides better formability than higher-strength 5083 for complex secondary structures and pipework .
Technical Specifications – 5754 Aluminum for LNG Applications
| Parameter | Specification |
|---|---|
| Alloy | 5754 (Al-Mg) |
| Magnesium Content | 2.6 – 3.6% |
| Tempers | O, H111, H112, H22, H32 |
| Thickness Range | 3.0 – 50.0 mm |
| Width | 100 – 2,650 mm |
| Tensile Strength | 190 – 240 MPa (O temper) |
| Cryogenic Service Temperature | Down to -196°C |
| Density | 2.66 – 2.71 g/cm³ |
| Standards | ASTM B209, EN 485, GB/T 22641-2020 |
| Certifications | IATF 16949, EN 10204 Type 3.2 |
Applications Across the LNG Value Chain
Primary and Secondary Containment
5754 aluminum is used in inner tanks and outer shells of LNG storage systems, as well as membrane-type LNG containment systems for carriers .
Cryogenic Pipework and Valves
5754's excellent thermal conductivity and reliable low-temperature performance make it preferred for cryogenic piping systems and valves .
LNG Carrier Components
For LNG tankers, 5754 meets requirements for secondary structures and internal components where materials must resist becoming brittle at low temperatures while remaining lightweight and corrosion-resistant .
Tanker Truck Applications
For overland LNG transportation, 5754 aluminum is among the alloys supplied for tanker truck manufacturing, balancing strength with corrosion resistance and lightweight properties .
Marine and Offshore Structures
LNG receiving terminals, offshore floating storage units, and marine infrastructure benefit from 5754's exceptional corrosion resistance in saltwater environments .
Why Choose Gwangyang Aluminum?
Gwangyang Aluminum (GYAL) brings world-class manufacturing capabilities to the LNG industry:
IATF 16949 certified – Automotive-grade quality management for energy infrastructure
EN 10204 Type 3.2 certification – Third-party verified material compliance for pressure equipment
Advanced equipment: Large hot rolling mill, cold rolling machine, and annealing furnaces
Comprehensive product range: 5754, 5052, 5005, 3003, 1050, and other aluminum sheets/coils
Global export expertise: Serving distributors and OEMs worldwide
Conclusion
For LNG storage tanks and cryogenic applications, 5754 aluminum sheet from Gwangyang Aluminum delivers the toughness, corrosion resistance, weldability, and formability that the LNG industry demands. With validated performance at temperatures as low as -196°C, 5754 provides a reliable and cost-effective solution for LNG containment, pipework, and structural components. Backed by IATF 16949 certification and comprehensive material documentation, Gwangyang Aluminum is your trusted partner for cryogenic aluminum solutions.
Contact Gwangyang Aluminum today for free samples, technical data sheets, or a factory-direct quotation for your LNG project.
FAQ – 5754 Aluminum Sheet for LNG Storage Tanks
Q1: Why is 5754 aluminum suitable for LNG storage at -162°C?
A: 5754 aluminum maintains strength and ductility at cryogenic temperatures down to -196°C. Unlike steel, which becomes brittle, Al-Mg alloys like 5754 increase in strength while retaining toughness .
Q2: What is the magnesium content of 5754 aluminum?
A: 5754 aluminum contains 2.6-3.6% magnesium as the primary alloying element, which provides its excellent cryogenic properties and corrosion resistance .
Q3: How does 5754 compare to 5083 for LNG applications?
A: 5083 offers higher strength for primary tank walls. 5754 provides better formability and corrosion resistance, making it ideal for secondary structures, pipework, and applications where moderate strength is sufficient .
Q4: Can 5754 aluminum be welded for LNG tank fabrication?
A: Yes. 5754 offers excellent weldability with conventional methods, enabling large tank fabrication and on-site assembly without significant property loss .
Q5: What certifications does Gwangyang Aluminum hold for LNG materials?
A: Gwangyang Aluminum holds IATF 16949 certification and provides EN 10204 Type 3.2 material certification for pressure equipment compliance .
Q6: What thickness range is available for LNG applications?
A: Gwangyang Aluminum supplies 5754 plate from 3.0 mm to 50.0 mm thickness, with widths up to 2,650 mm .
Gwangyang Aluminum – Energy & Cryogenic Materials Division
Phone: +82 (0)61-762-6699
Website:www.gyal.co.kr
Factory Address: 266 Sepungsandan Road, Gwangyang-Eub, Gwangyang-Si, Jeollanam-Do, Republic of Korea
