5083 Marine Grade Aluminum Plate Sheet

5083 marine grade aluminum plate, with its unique composition and process design, has become a core material in fields such as shipbuilding and offshore platforms. Its excellent corrosion resistance, weldability, and medium-high strength make 5083 marine grade aluminum plate one of the preferred materials in the marine industry.

5083 marine aluminum plate is mainly used in three tempers: H116, H321, and H112. Building ships with aluminum plates can not only significantly reduce weight but also enable ships to achieve higher speeds under the same power conditions.

Hull structures prioritize ‌H116/H321‌; O temper is chosen for deep-drawn parts
Hull/load-bearing structures: H321 is preferred to ensure welding strength and low-temperature toughness;
Complex curved parts: H32 temper is selected to optimize bending performance and reserve spring-back for aging.

‌Haomei Aluminum provides 5083 aluminum plates certified by several internationally renowned classification societies, including CCS, DNV, ABS, BV, LR, KR, to ensure their safe application in shipbuilding and offshore engineering.

5083 Marine Grade Aluminum Plate Sheet Specifications and Tempers

The specification range of 5083 aluminum plate is wide, meeting the needs of various application scenarios:

Thickness: Typically between 0.15-500mm, commonly used thickness in marine applications is 3-40mm
Width: 20-2650mm, commonly used width is 1000-2600mm
Length: 500-16000mm, customizable according to customer requirements

5083 aluminum plate can meet diverse needs through different tempers, commonly including:

H116: Suitable for applications requiring good corrosion resistance, such as shipbuilding
H321: Stabilized temper with balanced strength and toughness
H112: Suitable for products that gain strength through work hardening
O temper (annealed): Offers the highest ductility, ideal for deep drawing or complex forming applications

The commonly used tempers for marine aluminum plates are H116, H321, and H112. These are achieved through specific processing and stabilization treatments to ensure long-term stability in marine environments.

Application of 5083 Aluminum Plate in Hull Structures

Typical Specifications and Tempers for 5083 Marine Grade Aluminum Plate

Application Area	Typical Thickness Range	Common Temper	Main Performance Requirements
Hull Outer Plate	6-40mm	H116, H321	High corrosion resistance, high strength
Deck Structures	4-30mm	H116, H321	High strength, wear resistance
Bulkheads and Partitions	3-8mm	H116, O	Moderate strength, good formability
Keel and Supporting Structures	20-100mm+	H112, H321	High strength, high toughness
Internal Ship Structures	5-15mm	H116, H321	Good processability, weldability

Main Application Areas and Structural Functions of 5083 Marine Grade Aluminum Plate

Hull Outer Plate and Bottom Structure: As the main material for the submerged part of the hull, 5083 aluminum plate can effectively resist seawater corrosion, making it suitable for long-term contact with seawater. The outer bottom plate is the part most directly exposed to seawater, requiring excellent corrosion resistance and impact performance, which 5083 aluminum plate fully meets.
Deck Structure: The deck is the main area for personnel activities and cargo loading/unloading. It requires sufficient strength and wear resistance. 5083 aluminum plate is commonly used in the main deck, superstructure deck, and platform deck. Deck support structures also often use 5083 aluminum plate to withstand large loads and stresses.
Bulkheads and Partitions: Bulkheads divide the internal space of the hull into different compartments. 5083 aluminum plate-made bulkheads are not only lightweight but also have good sealing and fireproof performance. Especially in passenger ships and cruise liners, lightweight 5083 aluminum bulkheads increase usable space and reduce overall weight.
Keel and Supporting Structures: The keel is the central base component that connects the fore and aft posts of the hull and is a key load-bearing structure. Keels made from 5083 aluminum plate can withstand longitudinal bending moments, ensuring structural integrity. In small vessels, 5083 aluminum keels are particularly common, offering high strength and toughness for various sea conditions.
Internal Ship Structures: 5083 aluminum plate is also widely used in manufacturing various internal ship components such as ribs, beams, and pillars. These parts together form the ship’s framework to ensure overall strength and stability.

Applications of 5083 Marine Grade Aluminum Plate

Corrosion Resistance and Other Properties of 5083 Aluminum Plate

Corrosion Resistance of 5083 Marine Aluminum Plate

As an Al-Mg alloy, 5083 aluminum plate has excellent corrosion resistance, particularly in marine environments:

Seawater Corrosion Protection: The high magnesium content (4.0%-4.9%) in 5083 aluminum plate forms a dense oxide film in marine environments that effectively resists seawater attack.
Salt Spray Corrosion Resistance: Salt spray test results show that 5083 aluminum plate has excellent resistance to salt spray corrosion. After 48 hours of salt spray testing, the back of the plate showed almost no obvious signs of corrosion.
Intergranular and Exfoliation Corrosion: In exfoliation corrosion tests, 5083 aluminum plate was rated as PC level. Surface pitting was significant but penetration into the sample was minimal.
High-Temperature Corrosion: High-temperature environments significantly affect the corrosion resistance of 5083 aluminum alloy by accelerating the corrosion rate and reducing its effectiveness.

Mechanical and Processing Properties of 5083 Marine Aluminum Plate

In addition to excellent corrosion resistance, 5083 aluminum plate offers the following mechanical and processing characteristics:

Weldability: 5083 aluminum plate offers good weldability, compatible with common welding methods like MIG and TIG, and minimal strength loss after welding. Welding is recommended with 5356 or 5183 filler wire.
Workability: 5083 aluminum plate has good cold working properties and can be cut, stamped, cold bent, formed, and machined.
Heat Treatment Characteristics: As a non-heat-treatable alloy, 5083 aluminum plate improves its strength mainly through work hardening. Heat treatments include annealing, solution treatment, and aging.

Other Properties

Lightweight Advantage: With a density of about 2.7g/cm³, 5083 aluminum plate is significantly lighter than steel, allowing for considerable structural weight reduction while maintaining adequate strength. Using 5083 aluminum plate instead of traditional steel in shipbuilding can reduce weight by 30%-40%.
Low-Temperature Performance: 5083 aluminum alloy performs well in low-temperature environments, with its toughness increasing as temperatures drop, suitable for extreme conditions down to -269°C.
Fire Safety: Aluminum alloy is non-combustible and fire-safe, meeting modern fire protection requirements in ships.
Environmental Friendliness: 5083 aluminum alloy has a high recycling rate and is fully recyclable, meeting environmental protection standards.

5083 marine grade aluminum

Comparison of 5083 Aluminum Plate with Other Marine Grade Aluminum Alloys

Selection Recommendations:

For critical structures exposed to seawater for long periods, such as hull outer plates, decks, and bulkheads, prioritize the use of 5083 or 5086 alloys.
For components requiring complex forming, such as hull curvature sections or decorative parts, consider using 5086 or 5052 alloys.
For components with low strength requirements but requiring good formability, such as interior trim or non-load-bearing structures, 5052 alloy is a suitable choice.
For parts requiring machining or heat treatment, such as mechanical parts or tools, 6061 alloy may be considered.
When selecting an alloy, also consider material cost, availability, and compatibility with other components.

Comparison with Other 5000 Series Alloys

5083 vs 5052: 5083 contains more magnesium (4.0-4.9%) than 5052 (2.2-2.8%), so it has higher strength and corrosion resistance. The tensile strength of 5083 is about 310 MPa, while that of 5052 is about 210 MPa.
5083 vs 5086: 5086 has slightly lower magnesium content (3.5-4.5%) than 5083, so its strength and corrosion resistance are also slightly lower. The advantage of 5086 lies in its better formability.
5083 vs 5456: 5456 has higher magnesium content (4.7-5.5%) than 5083, providing slightly better strength and corrosion resistance. 5456 is mainly used in applications that require higher strength and corrosion resistance.

Comparison with 6000 Series Alloys

Strength Comparison: 5083’s tensile strength (270–310 MPa) is slightly higher than 6061-T6 (290–310 MPa), but 6061-T6 has higher yield strength (240–275 MPa) than 5083 (125–190 MPa).
Corrosion Resistance: 5083 has significantly better seawater corrosion resistance than 6061, which is prone to intergranular corrosion and stress corrosion cracking in marine environments.
Machinability: 6061’s heat-treatable strengthening property gives it better machinability and heat treatment performance, while 5083 increases strength primarily through cold working.

Overall Performance Comparison and Selection Recommendations

Alloy	Main Advantages	Main Disadvantages	Best Application Scenarios
5083	High strength, excellent corrosion resistance, good weldability	More difficult to process, relatively high cost	Ship main structures, key parts of offshore platforms, LNG storage tanks
5086	Good corrosion resistance, excellent formability, stress corrosion cracking resistance	Slightly lower strength than 5083	Hulls, complex formed structures, deep-drawn parts
5052	Good corrosion resistance, excellent formability, lower cost	Lower strength	Non-load-bearing structures, interior trim, complex formed parts
6061	High strength, excellent machinability, heat-treatable	Lower corrosion resistance, prone to stress corrosion	Secondary structures, machined parts, heat-treated components

Applications of 5083 Aluminum Plate in Other Marine Fields

Application Field	Specific Application Scenarios	Description
Offshore Platforms and Marine Facilities	Offshore Wind Power Equipment	5083 aluminum plate is used for structural components and piping in offshore wind power equipment. Its excellent seawater corrosion resistance and fatigue resistance ensure long-term stable operation in harsh marine environments. In wind power equipment, 5083 aluminum plate is mainly used in tower structures, platform decks, and nacelle covers.
	Oil Drilling Platforms	5083 aluminum plate is used for structural components and piping systems of oil drilling platforms, capable of withstanding the challenges of harsh offshore environments. Especially in non-load-bearing structures and auxiliary facilities, its lightweight advantage reduces overall platform weight and improves stability.
	Ocean Observation Equipment	5083 aluminum plate is used in manufacturing ocean observation buoys, monitoring equipment, and underwater robots. Its corrosion resistance ensures reliable operation in long-term marine conditions.
	Seawater Desalination Facilities	In seawater desalination equipment, 5083 aluminum plate is used for seawater contact components such as heat exchangers, piping systems, and containers. Its outstanding corrosion resistance reduces maintenance and replacement frequency, improving overall system efficiency.
Liquefied Natural Gas (LNG) Storage and Transportation	LNG Storage Tanks	5083-H321 aluminum plate is widely used in the construction of LNG storage tanks, especially in large LNG tank projects. A 160, 000 m³ LNG tank project used 5083-H321 aluminum coils that passed rigorous fire and low-temperature impact tests, with a service life exceeding 30 years.
	LNG Transport Tanks	5083 aluminum plate is used for manufacturing LNG transport tanks and containers. It maintains good mechanical properties at -20℃ to ensure safe transport.
	LNG Piping Systems	Piping systems made of 5083 aluminum plate are used for the delivery and distribution of LNG. Its excellent low-temperature toughness and corrosion resistance ensure safe operation under extreme temperature conditions.
Coastal Construction and Infrastructure	Coastal Building Facades and Roofs	5083 aluminum plate is used for exterior wall panels and roof structures of coastal buildings. It has good resistance to salt spray and UV aging. Its surface can be further enhanced with anodizing or nano-ceramic coating to improve weather resistance and aesthetics.
	Coastal Bridges	5083 aluminum plate is used for non-load-bearing components of coastal bridges, offering both aesthetics and durability, reducing maintenance costs by over 50%. In some landscape bridges, its lightweight and formability offer more design possibilities.
	Marine Protective Structures	5083 aluminum plate is used to manufacture marine protective structures such as breakwaters, revetments, and seawalls. It can withstand wave impact and seawater corrosion, protecting coastal facilities.

Marine Aluminum Plate Selection and Processing Recommendations

Temper Selection

H116/H321: Preferred for hull structures, offering better corrosion resistance (through stabilization treatment to control β phase precipitation at grain boundaries).
H112: General-purpose marine structural parts, lower cost with balanced performance.

Processing Notes

Welding: Prefer 5356 welding wire, control heat input to avoid softening in the heat-affected zone.
Cold Forming: After deep drawing, a stabilization treatment at 290℃ for 2 hours is required to prevent dimensional spring-back of 0.1–0.3mm caused by natural aging.
Surface Treatment: Hard anodizing can reach a thickness of 25μm (hardness 300HV), extending service life in marine atmospheric environments to 15 years.

Comparison with Other Marine Alloys

Property	5083	5052	5086
Magnesium Content	4.0-4.9%	2.2-2.8%	3.5-4.5%
Tensile Strength	275–350 MPa	228–269 MPa	240–300 MPa
Application Scenarios	Hulls / Load-bearing Structures	Decks / Decorative Parts	Vehicle Bodies / Tanks
Advantages	High Strength, Excellent Corrosion Resistance	Easy Forming, Low Cost	Excellent Weldability

More Information on 5083 Aluminum Plate

Basic Information on 5083 Aluminum Material

5083 aluminum plate is an Al-Mg series anti-corrosion aluminum alloy with magnesium (Mg) as the main alloying element. It is a non-heat-treatable strengthening alloy, mainly strengthened through work hardening. The magnesium content of this alloy is approximately 4.0%–4.9%, with small amounts of manganese (Mn 0.4%–1.0%) and chromium (Cr 0.05%–0.25%) as additional elements.

The density of 5083 aluminum plate is approximately 2.7 g/cm³, significantly lower than that of steel. This allows it to maintain sufficient strength while significantly reducing structural weight. The alloy has a melting point range of 600–650℃, a thermal expansion coefficient of approximately 23.5×10⁻⁶/℃, and a thermal conductivity of approximately 110 W/(m·K).

Comprehensive Advantages of 5083 Aluminum Plate

As a high-performance Al-Mg anti-corrosion aluminum alloy, 5083 aluminum plate demonstrates the following comprehensive advantages in shipbuilding and marine engineering fields:

Excellent Corrosion Resistance: Especially in marine environments, 5083 aluminum plate shows outstanding seawater corrosion resistance.
Good Mechanical Properties: With moderate strength and good toughness, it meets the load-bearing requirements of ship and marine engineering structures.
Excellent Weldability: Can be welded using conventional methods with minimal strength loss after welding, ensuring structural integrity and safety.
Lightweight Advantage: With a density of approximately 2.7 g/cm³, much lower than steel, it significantly reduces structural weight and improves fuel efficiency.
Good Workability: Suitable for various processing methods including cutting, stamping, cold bending, forming, and machining, meeting the needs of complex structural designs.

5083 Marine Grade Aluminum Plate Sheet Chemical Composition

Alloy	5083
Si	≦0.4
Fe	≦0.4
Cu	≦0.1
Mn	0.40-1.00
Mg	4.00-4.90
Cr	0.05-0.25
Zn	≦0.25
Ti	≦0.15
Zr	-
Unit	Wt%

5083 Marine Grade Aluminum Plate Sheet Mechanical properties

Alloy		5083
Temper		O/H111/H112	H116	H321
Rm(Mpa)	Tensile strength	≥275	≥305	305-385
Rp0.2(MPa)	Yield strength	≥125	≥215	215-295
Elongation	A(%)	≥16	≥10	≥12
Exfoliation	corrosion	-	≦PB
Intergranular corrosion	Mg/cm2	-	≦15
Certification		DNV, GL, ABS, CCS, BV, LR

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