5083 H116 Marine Aluminum Sheet Supplier China | Huawei

1. Executive Summary

5083 H116 Marine Aluminum Sheet is a high-strength, non-heat-treatable aluminum alloy product widely used for marine structures exposed to seawater, salt spray, and humid environments.

It belongs to the 5xxx series of aluminum-magnesium alloys, with magnesium as the principal alloying element and controlled additions of manganese and chromium.

The combination of alloy chemistry and H116 temper gives 5083 a strong balance of strength, corrosion resistance, weldability, and formability.

These characteristics make it particularly suitable for applications where reducing structural weight without sacrificing durability is important.

One of the key advantages of 5083 H116 is its performance in marine environments. Unlike many conventional steels, aluminum naturally develops a protective oxide film, while the controlled chemistry and temper of marine-grade 5083 help provide resistance to corrosion mechanisms relevant to seawater exposure.

ASTM B928/B928M specifically covers high-magnesium aluminum products intended for marine service and includes additional requirements related to corrosion resistance.

2. What Is 5083 H116 Marine Aluminum Sheet?

2.1 Definition of 5083 H116 Aluminum

5083 H116 is a specific alloy-temper combination rather than a separate aluminum alloy.

5083 identifies the chemical composition of the alloy, while H116 identifies its metallurgical temper and associated processing condition.

5083 is a member of the 5xxx aluminum family, which obtains its primary strengthening from magnesium in solid solution rather than from precipitation heat treatment. It is therefore classified as a non-heat-treatable aluminum alloy.

This makes 5083 fundamentally different from alloys such as 6061-T6, whose strength is developed through solution heat treatment and artificial aging.

2.2 What Does H116 Mean?

The H designation indicates that the material has been strengthened through strain hardening or related processing rather than heat treatment.

The H116 temper is specifically associated with aluminum-magnesium products intended for marine service.

It is not simply a generic hardness condition. The temper designation is connected with requirements for mechanical properties and corrosion performance appropriate to marine applications.

This distinction is important when purchasing material. A sheet identified only as 5083-H32, for example, should not automatically be treated as equivalent to 5083-H116 for a marine specification.

For projects involving prolonged seawater exposure, the buyer should confirm that the supplied material meets the required marine specification rather than relying on the alloy number alone.

2.3 Why Is 5083 H116 Suitable for Marine Applications?

The popularity of 5083 H116 in marine engineering comes from the combination of several properties.

Excellent Corrosion Resistance

5083 offers strong resistance to corrosion in marine environments, including exposure to seawater and salt-laden atmospheres.

This is one of the principal reasons it is used for marine structures.

High Strength

Among non-heat-treatable aluminum alloys, 5083 provides relatively high strength while maintaining useful ductility.

Good Weldability

5083 is well suited to common aluminum welding processes, making it practical for fabricated marine structures.

Low Density

With a density of approximately 2.66 g/cm³, aluminum is significantly lighter than steel. This can help reduce vessel structural weight and support higher payload, speed, or fuel efficiency depending on the vessel design.

Good Formability

5083 can be cut, bent, formed, and fabricated using appropriate equipment and process parameters. Formability depends on thickness, temper, tooling, and the degree of deformation required.

3. Typical Specifications of 5083 H116 Marine Aluminum Sheet

The specification of 5083 H116 marine aluminum sheet should be determined according to the structural design, fabrication process, marine environment, and applicable standard.

A professional purchasing specification normally covers alloy, temper, thickness, dimensions, mechanical properties, surface quality, tolerances, and certification.

4. Chemical Composition of 5083 Aluminum Alloy

5083 is a 5xxx-series aluminum-magnesium alloy. Its strength comes primarily from magnesium in solid solution, supported by controlled additions of manganese and chromium.

Unlike heat-treatable 6xxx-series alloys, 5083 does not rely on precipitation hardening to achieve its strength.

For marine applications, controlling the alloy chemistry is particularly important because the balance of magnesium, manganese, chromium, and impurity elements influences strength, weldability, microstructure, and resistance to marine corrosion.

According to ASTM B928/B928M, the chemical composition limits for 5083 marine products include the following values.

5. Key Properties of 5083 H116 Marine Aluminum Sheet

5083 H116 combines the inherent characteristics of the 5083 alloy with a marine-service temper specifically recognized for high-magnesium aluminum products.

Its performance makes it one of the important aluminum materials for lightweight marine structures.

5.1 Excellent Marine Corrosion Resistance

The most important advantage of 5083 H116 is its resistance to marine corrosion.

The alloy is designed for applications exposed to seawater, salt spray, and humid marine atmospheres.

Its controlled chemistry and metallurgical condition help provide the corrosion performance required for marine service.

ASTM B928/B928M includes specific corrosion-related requirements for applicable H116 and H321 products, including evaluation related to intergranular corrosion and exfoliation corrosion.

However, alloy selection alone does not eliminate corrosion. Proper drainage, joint design, surface condition, and control of galvanic contact with dissimilar metals remain important.

5.2 High Strength-to-Weight Ratio

5083 H116 provides relatively high strength while maintaining aluminum's low density of approximately 2.66 g/cm³.

This combination allows designers to reduce structural weight while maintaining the required load-bearing capability.

The actual weight-saving potential depends on the complete vessel design rather than material density alone.

5.3 Good Weldability

5083 is well suited to common aluminum welding processes, including MIG and TIG welding.

One important design consideration is that welding can change the local metallurgical condition and reduce strength in the heat-affected zone.

Therefore, structural calculations should consider the properties of the welded assembly, not only the original H116 sheet.

5.4 Good Formability

5083 H116 offers useful ductility for marine fabrication. It can be cut, bent, formed, and machined using appropriate equipment.

For demanding forming operations, the required bend geometry should be evaluated before production rather than assuming that every thickness has the same forming capability.

5.5 Low Density

The density of 5083 aluminum is approximately 2.66 g/cm³, substantially lower than that of conventional steel.

This gives aluminum a significant weight advantage in marine structures.

5.6 Good Low-Temperature Performance

Aluminum alloys such as 5083 generally retain useful ductility at low temperatures.

This makes 5083 H116 suitable for marine equipment that may operate in cold climates or experience significant temperature variations.

This characteristic can be advantageous for certain offshore and cold-region applications where maintaining toughness and ductility is important.

5.7 Non-Heat-Treatable Strengthening

5083 belongs to the non-heat-treatable 5xxx series. Its strength is primarily obtained through alloying and strain hardening rather than solution heat treatment and aging.

This is an important distinction when comparing 5083 H116 with alloys such as 6061-T6.

The H116 temper provides a controlled combination of strength, ductility, and marine corrosion performance suitable for the intended service environment.

6. Mechanical Properties of 5083 H116 Aluminum Sheet

Mechanical properties are critical when 5083 H116 is used for hulls and other load-bearing marine structures.

The applicable requirements depend on sheet thickness, test direction, and the governing specification.

For marine products manufactured to ASTM B928/B928M, 5083 H116 has specified minimum tensile and yield strengths that vary with thickness.

6.1 ASTM B928/B928M Mechanical Properties

For thicknesses up to 12.50 mm, elongation is specified using a 50 mm gauge length; for thicknesses above 12.50 mm, the requirement uses a 5× specimen diameter.

ASTM B928/B928M also provides separate transverse-direction requirements for the thickness ranges covered by the standard.

6.2 Tensile Strength

Tensile strength represents the maximum engineering stress that the material can withstand during a tensile test before fracture.

For 5083 H116 under ASTM B928/B928M, the minimum longitudinal tensile strength is 305 MPa for thicknesses from 1.60 through 40.00 mm, while the minimum is 285 MPa for thicknesses over 40.00 through 80.00 mm.

This relatively high tensile strength contributes to the alloy's suitability for lightweight structural applications.

6.3 Yield Strength

The minimum 0.2% offset yield strength is:

215 MPa for 1.60–40.00 mm

200 MPa for >40.00–80.00 mm

Yield strength is particularly important in structural design because it indicates the stress level at which permanent plastic deformation begins under the specified test conditions.

6.4 Elongation

The minimum elongation specified by ASTM B928/B928M for 5083 H116 in the relevant sheet and plate thickness ranges is 10%.

Elongation provides an indication of ductility and the material's ability to undergo plastic deformation before fracture.

This is important during marine fabrication, particularly for bending, forming, and structural deformation.

6.5 Elastic Modulus

The elastic modulus of aluminum alloys is approximately 70 GPa.

Unlike tensile and yield strength, the elastic modulus is not strongly increased by H116 strain hardening.

Therefore, when comparing aluminum with steel, designers must account for aluminum's lower stiffness even though its strength-to-weight ratio is attractive.

This is particularly relevant to marine structures where deflection, buckling, and structural stiffness may govern the design.

7. Marine Aluminum Sheet 5083 H116 vs. Other Alloys

Selecting a marine aluminum alloy requires more than comparing tensile strength.

Corrosion resistance, weldability, formability, weight, temper stability, and performance after welding all influence the suitability of a material for marine construction.

Actual mechanical properties vary with temper, thickness, product form, and applicable specification.

8. Corrosion Resistance of 5083 H116 in Marine Environments

Marine structures operate under aggressive corrosion conditions. Continuous or repeated exposure to seawater introduces chloride ions, moisture, oxygen, and wet-dry cycles that can accelerate corrosion.

5083 H116 is specifically designed for demanding marine applications, but its corrosion resistance should be understood as part of a complete material-selection and structural-design strategy.

8.1 Natural Protective Oxide Film

When aluminum is exposed to air, it rapidly develops a thin oxide film on its surface. This film helps isolate the underlying metal from the environment and provides a basic level of corrosion protection.

The protective behavior of this oxide layer is one reason aluminum can perform well in many atmospheric and marine environments.

However, seawater contains chloride ions that can locally disrupt the oxide film, so aluminum is not completely immune to corrosion.

8.2 Resistance to Seawater Exposure

5083 contains a relatively high level of magnesium, together with controlled manganese and chromium additions.

This alloy chemistry provides excellent resistance to many marine corrosion mechanisms.

ASTM B928/B928M specifically covers high-magnesium aluminum products intended for marine service and includes additional requirements related to corrosion performance.

8.3 Intergranular Corrosion

Intergranular corrosion attacks preferentially along grain boundaries.

For high-magnesium 5xxx alloys, metallurgical condition and thermal exposure are important because certain microstructural changes can affect corrosion behavior.

ASTM B928/B928M includes intergranular corrosion requirements for applicable marine products.

8.4 Exfoliation Corrosion

Exfoliation corrosion is a form of localized corrosion that can develop along susceptible grain structures, producing a layered or flaking appearance.

Marine aluminum used in structural applications must therefore be manufactured and processed to provide suitable resistance to this type of attack.

The H116 marine temper is associated with requirements intended to control corrosion performance in marine service.

8.5 Pitting Corrosion

Chloride-containing seawater can cause localized pitting on aluminum surfaces.

Pitting may be influenced by:

Surface contamination

Deposits

Chloride concentration

Surface damage

Poor drainage

Crevices

Good design should minimize areas where seawater can remain trapped and should avoid unnecessary surface damage during fabrication.

8.6 Galvanic Corrosion

One of the most important corrosion concerns for aluminum marine structures is galvanic corrosion.

When aluminum is electrically connected to a more noble metal, such as certain steels or copper alloys, while both are exposed to an electrolyte such as seawater, galvanic corrosion can occur.

8.7 Corrosion at Welded Areas

Welding can locally change the microstructure and surface condition of aluminum.

The welded region and heat-affected zone should therefore be considered separately during corrosion assessment.

For structural marine projects, welding procedures should follow the applicable engineering and classification requirements.

9. Manufacturing Process of 5083 H116 Marine Aluminum Sheet

9.1 Melting and Alloying

High-quality aluminum and controlled alloying elements are melted to achieve the specified 5083 chemical composition.

Particular attention is given to Mg, Mn, Cr, Fe, Si, and Cu because alloy chemistry affects strength, weldability, and marine corrosion resistance.

9.2 Casting and Homogenization

The molten alloy is cast into slabs and then homogenized under controlled conditions.

Homogenization improves microstructural uniformity and helps optimize the material for subsequent rolling.

9.3 Hot and Cold Rolling

Hot rolling progressively reduces the slab thickness while controlling temperature, reduction, surface quality, and flatness.

Cold rolling may then be used to achieve the required final thickness, dimensional accuracy, and work-hardening condition.

9.4 H116 Temper Processing

The H116 temper is established through controlled processing to achieve the required combination of strength, ductility, and marine corrosion resistance.

Unlike heat-treatable alloys such as 6061-T6, 5083 develops its strength primarily through alloying and strain hardening rather than precipitation hardening.

9.5 Leveling and Cutting

After rolling and temper processing, the sheet may be leveled to improve flatness and cut to the required width and length.

Good dimensional control is particularly important for shipbuilding and other large-scale marine fabrication.

10. Common Applications of 5083 H116 Marine Aluminum Sheet

5083 H116 is widely used in marine structures where high strength, seawater corrosion resistance, low density, and good weldability are required.

Its combination of properties makes it particularly suitable for welded structures and weight-sensitive vessels.

10.1 Boat and Ship Hulls

Hull construction is one of the most important applications of 5083 H116.

The alloy's relatively high strength-to-weight ratio allows designers to reduce structural weight while maintaining the required mechanical performance. Its resistance to seawater corrosion also makes it suitable for prolonged marine exposure.

Typical applications include:

Fishing boats

Workboats

Patrol boats

Passenger vessels

Recreational boats

High-speed craft

10.2 Marine Decks and Platforms

5083 H116 can be used for:

Deck plates

Working platforms

Walkways

Access structures

Equipment platforms

10.3 Bulkheads and Structural Panels

Marine vessels often use aluminum sheets for bulkheads and structural partitions.

5083 H116 can provide a useful combination of strength, weldability, and corrosion resistance, making it suitable for fabricated structural panels.

Applications may include:

Internal bulkheads

Structural partitions

Side panels

Reinforced panels

Equipment enclosures

10.4 Marine Superstructures

Because aluminum is significantly lighter than steel, 5083 H116 can be used for selected superstructure components.

Reducing the weight above the vessel's center of gravity can contribute to improved vessel performance and stability when properly incorporated into the overall design.

Applications may include:

Wheelhouse structures

Cabin structures

Roof panels

Superstructure walls

Equipment housings

10.5 Marine Tanks and Containers

5083 H116 can also be used for certain marine tanks and containers where corrosion resistance, weldability, and low weight are important.

The suitability of the alloy depends on the stored medium, temperature, pressure, welding method, and applicable regulations.

For tanks containing specific fuels, chemicals, or aggressive media, compatibility should be confirmed through engineering and regulatory requirements before material selection.

10.6 Offshore and Marine Equipment

5083 H116 can be considered for various offshore and marine structural components, including:

Offshore platforms

Service vessels

Marine equipment housings

Access structures

Protective panels

Fabricated support components

The actual material specification should be matched to the environmental conditions and structural loading.

10.7 High-Speed Marine Craft

Weight reduction is particularly valuable for high-speed vessels.

Using 5083 H116 in suitable structural locations can reduce mass while maintaining adequate strength and corrosion resistance.

Potential applications include:

High-speed passenger craft

Patrol craft

Rescue boats

Fast ferries

Specialized workboats

The benefit of aluminum depends on the vessel's complete structural design, propulsion system, and operating conditions.

11. Fabrication and Welding of 5083 H116

5083 H116 is well suited to marine fabrication and can be processed using common aluminum cutting, forming, and welding techniques.

However, aluminum requires different fabrication practices from steel, particularly because of its high thermal conductivity, low melting point, and oxide layer.

11.1 Cutting

5083 H116 can be processed using methods such as:

CNC sawing

Plasma cutting

Waterjet cutting

Laser cutting where suitable

11.2 Bending and Forming

5083 H116 provides useful formability, but its work-hardened condition means that forming capability depends on the required deformation.

Important factors include:

Material thickness

Bend radius

Grain direction

Tool geometry

Forming temperature

Number of forming operations

11.3 MIG Welding

Gas Metal Arc Welding (GMAW/MIG) is widely used for marine aluminum fabrication because it provides relatively high productivity.

The aluminum surface should be properly cleaned before welding because contaminants and the naturally occurring oxide layer can affect weld quality.

11.4 TIG Welding

Gas Tungsten Arc Welding (GTAW/TIG) provides greater control of the welding arc and heat input.

For large marine structures, MIG/GMAW is generally more productive, while TIG/GTAW may be selected where greater process control is required.

13. Why Choose Huawei 5083 H116 Marine Aluminum Sheet

Henan Huawei Aluminum Co., Ltd. supplies aluminum products for international industrial applications, including marine-grade aluminum sheet and plate.

For 5083 H116 Marine Aluminum Sheet, quality should be evaluated through alloy consistency, temper control, mechanical performance, dimensional accuracy, and traceability rather than price alone.

13.1 Marine-Grade Material Focus

5083 H116 is specifically selected for applications requiring a combination of high strength, seawater corrosion resistance, and weldability.

Huawei can supply 5083 H116 material according to agreed technical specifications and applicable standards.

13.2 Controlled Alloy Chemistry

Consistent chemical composition is essential for 5083 H116 because magnesium, manganese, chromium, and impurity levels influence the alloy's mechanical and corrosion performance.

Chemical composition can be checked against the applicable material standard to ensure batch-to-batch consistency.

13.3 Mechanical Property Control

Huawei can provide material testing and documentation covering key properties such as:

Tensile strength

Yield strength

Elongation

Thickness and dimensional accuracy

For marine projects, the mechanical requirements should be confirmed according to the specified thickness and applicable standard.

13.4 Dimensional and Surface Quality

Marine fabrication often involves large aluminum sheets, where dimensional consistency can directly affect cutting and assembly efficiency.

Quality control focuses on:

Thickness tolerance

Width and length

Flatness

Edge condition

Surface appearance

The material can be supplied in sizes and specifications according to customer requirements and production capabilities.

13.5 Quality Documentation and Traceability

For professional B2B procurement, material traceability is an important part of quality assurance.

Depending on the order requirements, documentation may include:

Mill Test Certificate (MTC)

Chemical composition report

Mechanical test results

Dimensional inspection records

Corrosion-related test documentation where applicable

This documentation helps buyers verify that the delivered material corresponds to the agreed specification.

13.6 Export-Oriented Supply

For overseas marine projects, consistent packaging and transportation protection are essential.

Proper packaging helps protect 5083 H116 sheets from:

Moisture

Condensation

Scratches

Edge damage

Contamination

Huawei can coordinate product specifications, packaging, documentation, and shipment requirements for international B2B orders.

14. Conclusion

5083 H116 Marine Aluminum Sheet is a high-performance 5xxx-series aluminum material designed for demanding marine applications.

Its combination of high strength, excellent seawater corrosion resistance, good weldability, useful formability, and low density makes it particularly suitable for lightweight marine structures.

However, selecting the correct material requires more than specifying "5083 aluminum."

Buyers should clearly define the 5083 alloy, H116 temper, thickness, dimensions, applicable standard, mechanical requirements, corrosion requirements, and certification needs.

For marine-grade products, ASTM B928/B928M is an important reference because it establishes requirements for high-magnesium aluminum products intended for marine service, including applicable mechanical and corrosion-related requirements.

When properly manufactured, inspected, fabricated, and maintained, 5083 H116 provides a strong combination of lightweight construction and long-term marine durability, making it a practical choice for modern shipbuilding and marine engineering.

FAQs

What is 5083 H116 aluminum?

5083 H116 is a non-heat-treatable Al-Mg-Mn aluminum alloy in the H116 temper, specifically associated with marine-service applications. It offers high strength, excellent seawater corrosion resistance, and good weldability.

Is 5083 H116 suitable for seawater?

Yes. 5083 H116 is widely used in seawater-exposed structures because of its strong resistance to marine corrosion. For products specified as marine grade, the applicable standard should be checked to confirm the required corrosion performance.

What is the tensile strength of 5083 H116?

Under ASTM B928/B928M, the minimum longitudinal tensile strength is generally 305 MPa for thicknesses from 1.60 to 40.00 mm and 285 MPa for thicknesses above 40.00 to 80.00 mm. Requirements can vary with thickness and product specification.

What is the yield strength of 5083 H116?

The minimum yield strength under ASTM B928/B928M is 215 MPa for 1.60–40.00 mm and 200 MPa for thicknesses above 40.00–80.00 mm.

Is 5083 H116 weldable?

Yes. 5083 is well suited to common aluminum welding processes such as MIG/GMAW and TIG/GTAW. However, welding can reduce local mechanical strength, so the welded heat-affected zone should be considered during structural design.

What is the difference between 5083 H116 and 5083 H32?

Both are 5083 alloy tempers, but they are not interchangeable. H116 is specifically associated with marine-service requirements, while H32 represents a different strain-hardened and stabilized condition. The appropriate temper should be selected according to the application and governing specification.

Is 5083 H116 better than 6061-T6 for marine applications?

For many welded, seawater-exposed structures, 5083 H116 offers advantages in marine corrosion resistance and post-welding performance. 6061-T6, however, provides useful strength and machinability for many structural and fabricated components. The best alloy depends on the specific design and service conditions.

Can 5083 H116 be used for boat hulls?

Yes. 5083 H116 is commonly used for boat and ship hulls, particularly where low weight, corrosion resistance, strength, and weldability are important.

Does 5083 H116 require surface coating?

Not necessarily. 5083 has good inherent corrosion resistance, but coatings or other protective measures may still be used depending on the vessel design, operating environment, appearance requirements, galvanic-corrosion risks, and maintenance strategy.