5083 Aluminum Alloy Plates for LNG

5083 Aluminum Alloy Plates a non-heat-treatable Al-Mg high-Mg alloy, the highest-strength standard 5xxx series aluminum alloy, globally recognized as the primary structural material for LNG cryogenic storage & transportation at -162°C.

Key Performance for LNG Working Conditions

Cryogenic Mechanical Property

Room temp : Tensile 275–350 MPa, Yield ≥125 MPa, Elongation ≥15%.
-162°C / -196°C: Tensile increases by ~20–30%, elongation still >20%; excellent impact resistance to absorb thermal contraction stress.

Excellent Weldability

No post-weld heat treatment required ,Weld joint efficiency reaches 90%–95% of base metal; heat-affected zone has minimal strength loss, low cold cracking risk under thermal cycling.

Marine & Medium Corrosion Resistance

Dense natural Al₂O₃ oxide film, resistant to salt spray, seawater, LNG trace H₂S & moisture,suitable for 40–50-year design life of LNG facilities.

Lightweight Benefit

only ~1/3 of steel; drastically reduces dead load of LNG tankers, land full-containment inner tanks, foundation & insulation cost.

5083 Aluminum Alloy Plates Standard Tempers for LNG

Production Standards & Technical Specifications

Applicable Standards
International: ASTM B209, EN 14286, ABS/BV/LR/CCS marine vessel certification
Chinese: GB/T 3190, GB/T 24517 cryogenic pressure vessel aluminum plate standard
Common Size Range
Thickness: 3–100 mm
Width: 1000–2650 mm
Length: 2000–12000 mm, customizable cut-to-size

Comparison with Alternative Alloys

5083 vs 5052: 5052 lower strength, cannot withstand large hydrostatic load of big LNG tanks; only used for small auxiliary parts.
5083 vs 5086: 5083 higher tensile strength & creep resistance, global standard for main LNG structures.

Quotation Tips

Specify exact temper: H116 / H321 / O
List thickness, width, length, total quantity
Clarify required certificates: CCS/BV/ASTM B209
Confirm trade term: FOB / CIF, target port
State surface requirement: mill finish / brushed surface
If you provide your 5083 aluminum plate required thickness, temper and order tonnage, we can give you an accurate target quotation range.

Contact us

Email:sale06@mingtai-al.com