5083 Marine Grade Aluminum Plate

What is marine grade 5083 aluminum plate?

5083 marine aluminum plate belongs to the Al-Mg series anti-rust aluminum. It is renowned for its outstanding resistance to seawater corrosion, high strength (especially in the work-hardened condition), excellent weldability, and good formability. It is certified by major classification societies worldwide and is the preferred material for constructing hull structures, superstructures, and various marine equipment.

Haomei 5083 marine aluminum plate has been certified by international classification societies including CCS, DNV, ABS, BV, and LR, making it the preferred aluminum alloy material for shipbuilding.

Why Choose Marine Grade Aluminum 5083

5083 marine-grade aluminum plate has become the "golden material" for modern ships and marine engineering due to its three core advantages: seawater corrosion resistance, ease of welding, and medium strength. It is especially suitable for hull structures that are submerged in seawater for long periods. When selecting, based on specific application scenarios (e.g., H116 for hulls, H321 for pressure vessels) and design requirements, combined with classification society certifications, structural safety and long-term reliability can be ensured.

The high magnesium content of 5083 aluminum enables high strength through solid solution strengthening, and its surface forms a dense and stable aluminum oxide film that effectively resists corrosion from seawater and marine atmospheres.

• Corrosion Resistance: Magnesium content 4.0%-4.9%, excellent seawater corrosion resistance
• Strength-to-Weight Ratio: 20% lighter than traditional steel, tensile strength 110-136 MPa
• Weldability: Good cold workability, suitable for welding complex sheet metal parts

5083 marine-grade aluminum plate is a well-balanced and reliable marine aluminum alloy proven by long-term practical applications. Its excellent corrosion resistance, sufficient strength, good weldability, and mature classification society certification system make it a cornerstone material for ship and marine engineering structures.

When selecting, it is essential to confirm its temper (preferably H116/H321) and the corresponding classification society certification to ensure project safety and quality.

5083 Marine Grade Aluminum Plate Specifications

5083 Marine Grade Aluminum Plate Temper Options

The most common tempers for marine 5083 aluminum plate are the following two, both designed to provide stability against exfoliation corrosion and stress corrosion:

5083 H116 / H321 Tempers:

H116: This is a stabilized temper specifically used for aluminum-magnesium alloys with magnesium content over 4.0%. Through specific processes (such as controlled rolling and low-temperature stabilization), the β phase (Mg₂Al₃) in the alloy is uniformly dispersed, greatly enhancing the material's resistance to exfoliation corrosion and stress corrosion in marine environments. This is the most standard and important temper for 5083 marine plates.

H321: Achieved through thermal processing (controlled hot rolling temperature) and appropriate techniques, it provides corrosion resistance similar to H116. H116 and H321 are very close in performance and applications, and both are standard tempers recognized by classification societies.

5083 O Temper (Annealed):

The softest material with the lowest strength but the best ductility and formability. Suitable for parts that require deep drawing or severe forming.

5083 H111 Temper:

Partially annealed, with strength between O temper and H1x tempers, suitable for parts that require certain strength after forming.

Advantages of 5083 Marine Aluminum

Excellent Corrosion Resistance:

Seawater Corrosion Resistance: Outstanding resistance to seawater and marine atmospheric environments, with strong pitting and crevice corrosion resistance.

Low Sensitivity to Stress Corrosion Cracking: In marine-grade tempers (such as H116/H321), special treatments provide high resistance to stress corrosion cracking, which is a key reason for its use in critical ship structures.

High Strength:

Among non-heat-treatable aluminum alloys, 5083 exhibits very high strength. Its tensile strength typically reaches 275-350 MPa, far higher than pure aluminum and alloys such as 3003.

Strength can be further increased through cold working (H116, H321, H111 tempers).

Excellent Weldability:

It is a weldable alloy, suitable for common welding methods such as MIG and TIG.

High joint efficiency and good retention of strength after welding.

Low tendency for welding cracks.

Good Formability:

Moderate formability, suitable for cold working processes such as bending, stamping, and rolling, making it ideal for complex ship hull surfaces.

Low Density and Lightweight:

Density approximately 2.66 g/cm³, only 35% of steel. At the same strength, it significantly reduces structural weight, increasing ship payload, improving speed, or lowering fuel consumption.

5083 Marine Grade Aluminum Plate Chemical Composition

5083 Marine Grade Aluminum Plate Mechanical Properties

5083 Marine Grade Aluminum Plate Applications

• Hull Structures: 5083 Marine Grade Aluminum Plate is commonly used in critical structural parts of ships such as hulls, decks, bulkheads, and keels. With its high strength and outstanding corrosion resistance, it ensures long-term stability and reliability in marine environments.
• Ship Equipment: 5083 aluminum plate is suitable for manufacturing equipment such as fuel tanks, piping systems, and pressure vessels, enhancing durability and safety.
• Marine Engineering: Widely used in offshore platform support structures, submersible hulls, and other marine engineering facilities, meeting the strength and corrosion resistance requirements under harsh sea conditions.
• Special Vessels: 5083 aluminum plate is an ideal material for high-speed boats, yachts, and LNG ships, balancing lightweight and structural strength, making it the preferred aluminum plate for marine applications.

Comparison of 5083 Marine Grade Aluminum with Other Marine Aluminum Alloys

Haomei 5083 Aluminum Plate Size Chart

Hot-Selling 5083 H32 Aluminum Sheet/Plate Sizes – Imperial Units

Hot-Selling 5083 H116 Aluminum Sheet/Plate Sizes – Imperial Units

Hot-Selling 5083 H321 Aluminum Sheet/Plate Sizes – Imperial Units

5083 Marine Grade Aluminum Plate Processing and Welding Guidelines

• Cutting: Can be done using plasma cutting, laser cutting, waterjet cutting, etc.
• Forming: Recommended minimum cold bend radius is 2-3 times the plate thickness.

Welding:

• Filler Wire Selection: Typically use ER5183 or ER5356 filler wire to match the chemical composition and properties of the base material.
• Cleaning: Thoroughly clean the groove and both sides of oil, grease, and oxide film before welding.
• Preheating: Usually not required.

Why Choose Haomei Aluminum for Marine Aluminum?

• High-Quality Materials: Provides high-strength, corrosion-resistant 5083, 5754 and other marine aluminum plates, specifically designed for marine environments, durable and long-lasting.
• Authoritative Certifications: Products are certified by CCS, LR, DNV, and other international marine aluminum certifications, ensuring compliance with ship safety and performance standards.
• Extensive Experience: Years of focus on aluminum production and export, deeply involved in the shipbuilding and offshore engineering industries, understanding customer needs.
• Strict Quality Control: From raw material procurement to finished product, every step is strictly inspected to ensure each batch meets international standards.
• Multiple Specifications Available: Various thicknesses, widths, and tempers are available, supporting customized processing to meet different ship design requirements.
• Efficient Service: Direct supply from manufacturer, stable delivery times, strong bulk supply capability, helping customers save procurement costs.