5456 Marine Grade Aluminum Plate Sheet
5456 aluminum alloy is an important member of the aluminum-magnesium alloy family, classified as a non-heat-treatable strengthening alloy. It is closely related to 5356 aluminum alloy but is primarily used for structural applications rather than as a welding filler. As a wrought aluminum-magnesium alloy, 5456 cannot be strengthened through heat treatment but can enhance its mechanical properties through cold working and specific tempering treatments. Due to its excellent corrosion resistance, high strength, and good weldability, it performs well in marine environments and other demanding applications.
The main alloying element of 5456 aluminum plate is magnesium (with a content of up to 5.8–6.8%), supplemented by appropriate amounts of manganese (0.50–0.8%) and chromium (0.05–0.20%). This combination of elements gives the material excellent corrosion resistance and mechanical properties. Compared to other marine-grade aluminum alloys, 5456 offers higher strength and better resistance to stress corrosion cracking, making it especially suitable for use in saltwater environments.
5456 aluminum plate is a forged aluminum-magnesium alloy, belonging to the 5000 series. It is known for its excellent corrosion resistance (especially in marine environments) and higher strength compared to similar products such as 5083.
5456 aluminum plate has enhanced mechanical strength, but it is more sensitive to stress corrosion, especially if improperly treated or exposed to high temperatures for prolonged periods.
Haomei Aluminum 5456 aluminum plate complies with ASTM B928 (marine service), ASTM B209 (sheet/plate), and EN 573-3.
Certified by marine classification societies: DNV, ABS, LR, CCS.
5456 Marine Grade Aluminum Plate Sheet Specifications
| Alloy | 5456 LF10 A5456 ALMg5Mn1 AMr5/1550 EN AW-5456A |
| Temper | O/H116/H321/H111/H112 |
| Thickness(mm) | 3-50 |
| Width(mm) | ≦3600 |
| Shape | Plate, sheet, panel |
| Feature | High Strength Welded Structure |
| Certification | CCS, DNV, NK, CCS, ABS, BV, LR, KR |
Common Thickness Specifications
5456 aluminum plate is available in a variety of thickness specifications to meet different application needs. Based on market availability and industry standards, its commonly used thickness range is as follows:
- Thin plate: 0.008 inches to 0.250 inches (0.2mm to 6.35mm)
- Medium-thick plate: 0.250 inches to 1.0 inch (6.35mm to 25.4mm)
- Thick plate: 1.0 inch to 14.0 inches (25.4mm to 355.6mm)
It is worth noting that the standard commercial plate thickness typically ranges from 0.012 inches (0.3mm) to 14.0 inches (355.6mm). In practical applications, the most common thicknesses are 0.125 inches (3.2mm), 0.250 inches (6.4mm), 0.500 inches (12.7mm), and 1.0 inch (25.4mm), with substantial stock available at Haomei Aluminum.
5456 Aluminum Tempers
The temper designation of 5456 aluminum plate represents its processing and heat treatment history, directly affecting its final mechanical properties. The following are common temper states of 5456 aluminum plate and their characteristics:
5456 H116 Temper
- Strain hardened and then partially annealed
- Excellent corrosion resistance, especially stress corrosion cracking resistance
- Maintains good weldability with high weld joint strength
- Typical tensile strength: 330–430 MPa
- Typical yield strength: 280 MPa
- Elongation: about 12%
5456 H321 Temper
- Strain hardened followed by a stabilizing treatment
- Offers higher strength than H116
- Retains good corrosion resistance and weldability
- Suitable for applications requiring higher structural strength
Other Common 5456 Tempers
- H111: Slightly strain hardened, retains good formability
- H34: Cold worked and stabilized, higher strength than H321
- O temper: Fully annealed, highest ductility and lowest strength
Haomei Aluminum 5456 Alloy in Various Tempers Conforms to the Following Standards
International Standards
| Standard Organization | Standard Number | Standard Title |
| ASTM | ASTM B209 | Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate |
| ASTM B221 | Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes | |
| ASTM B928 | Standard Specification for High Magnesium Aluminum-Alloy Sheet and Plate for Marine Service and Similar Environments | |
| ISO | ISO 209 | Aluminum and Aluminum Alloys — Chemical Composition and Forms of Products |
| ISO 6362 | Wrought Aluminum and Aluminum Alloys — Sheets, Strips and Foils — Tolerances on Dimensions and Form | |
| EN | EN 485 | Aluminum and Aluminum Alloys — Sheet, Strip and Plate — Mechanical Properties |
| EN 573 | Aluminum and Aluminum Alloys — Chemical Composition and Form of Wrought Products |
Industry and Military Standards
In addition to international standards, 5456 aluminum plate also complies with various industry and military standards:
- AMS Standards: AMS QQ-A-250/9: Aluminum and Aluminum-Alloy Sheet and Plate
- Classification Society Standards: China Classification Society (CCS), Lloyd's Register (LR), American Bureau of Shipping (ABS)
- Other Industry Standards: Aerospace standards (e.g., SAE AMS), pressure vessel standards (e.g., ASME BPVC)
Characteristics of 5456 Aluminum
Mechanical Properties
5456 aluminum plate exhibits excellent mechanical properties, particularly outstanding among non-heat-treatable alloys:
- High strength: 5456 has significantly higher strength than pure aluminum and many other aluminum alloys, especially in H116 and H321 tempers
- Good toughness: Maintains good toughness and impact resistance even in low-temperature environments
- Moderate hardness: Brinell hardness around 90, offering good wear resistance and machinability
- High fatigue strength: Performs well under cyclic loading, suitable for long-term structural applications
Physical Properties
The physical properties of 5456 aluminum plate enable it to perform well in various environments:
Density
Approximately 2.65 g/cm³, slightly higher than pure aluminum but much lower than steel
Melting Point
568.3–638°C (1055–1180°F), typical for aluminum alloys
Thermal Conductivity
About 150 W/m·K, indicating good heat transfer capability
Electrical Conductivity
Around 35% IACS (International Annealed Copper Standard), moderate conductivity
Coefficient of Thermal Expansion
Approximately 23.5 x 10⁻⁶/°C, similar to other aluminum alloys
Machining Performance
The machining characteristics of 5456 aluminum plate make it suitable for a wide range of manufacturing processes:
- Weldability: Good performance in arc welding, especially gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW)
- Formability: Can be shaped through rolling, extrusion, and other methods, but not suitable for casting
- Machinability: Poor machinability in annealed condition, but significantly improved after cold working
- Surface treatment capability: Attractive surface after anodizing, enhancing corrosion resistance
Corrosion Resistance of 5456 Aluminum
Marine Environment Adaptability
The corrosion resistance of 5456 aluminum plate in marine environments is particularly outstanding and one of its most notable features:
- High salt spray corrosion resistance: Performs excellently in salt spray environments, ideal for long-term seawater exposure
- Stress corrosion cracking resistance: Due to high magnesium content (5.8–6.8%), 5456 offers excellent resistance to stress corrosion cracking
- Seawater resistance: Can withstand long-term humid marine environments, with stable performance in shipbuilding and offshore engineering
- Microbial corrosion resistance: Offers good resistance to attachment and corrosion from marine microorganisms
Corrosion Protection Mechanism
The corrosion resistance of 5456 aluminum plate is derived from its chemical composition and microstructure:
Role of magnesium: High magnesium content forms a dense oxide film that effectively blocks corrosion media
Effect of chromium: The added chromium further enhances resistance to pitting and crevice corrosion
Uniform microstructure: Forging process ensures uniform structure, reducing initiation points for corrosion
Comparison with Other Marine-Grade Aluminum Alloys
Compared with other commonly used marine-grade aluminum alloys, 5456 performs as follows in terms of corrosion resistance:
- Superior to 6061: 5456 has significantly better corrosion resistance than 6061 aluminum alloy
- Comparable to 5083: In most marine environments, the corrosion resistance of 5456 is comparable to 5083, but with higher strength
- Special environment considerations: In some extreme acidic or alkaline environments, additional protective measures may be required
5456 Marine Grade Aluminum Plate Sheet Chemical Composition
| Alloy | 5456 | |
| Si | ≦0.25 | |
| Fe | ≦0.4 | |
| Cu | ≦0.1 | |
| Mn | 0.50-1.0 | |
| Mg | 4.70-5.50 | |
| Cr | 0.05-0.20 | |
| Zn | ≦0.25 | |
| Ti | ≦0.2 | |
| Zr | - | |
| Standard | EN573 | ASTM B928 |
5456 marine aluminum alloy Mechnical Properties
| Alloy | 5456 | |
| Tensile Strength | σbMpa) | ≥420 |
| Yield Strengthσ | 0.2Mpa) | ≥275 |
| Enlogation | (δ5%) | ≥10 |
5456 marine aluminum sheet specification
| TypIcial Alloy | 5456 | |
| Typcial Tempe | F, H112, F | |
| Thickness | (MM) | 3, 0~260 |
| Width | (MM) | 600~2600 |
| Length | (MM) | 1000-24000 |
5456-h116 aluminum specification
| TypIcial Alloy | 5456 | |
| Typcial Tempe | H111 H116 | |
| Thickness | (MM) | 3.0~260 |
| Width | (MM) | 1000~4000 |
| Length | (MM) | 1000-38000 |
5456 Marine Grade Aluminum Plate Sheet product details
Applications of 5456 Aluminum in Shipbuilding
Hull Structure Applications
5456 aluminum plate plays an important role in shipbuilding, especially in hull structures:
Hull shell: 5456 aluminum plates in H116 and H321 tempers are widely used for ship hulls, offering high strength and excellent corrosion resistance
Deck structure: 5456 aluminum plate is suitable for ship decks, especially areas subjected to high stress and harsh marine environments
Bulkheads and partitions: Used in internal bulkheads and partitions of ships, providing structural support and corrosion protection
Superstructures: Superstructures of ships, such as wheelhouses and deckhouses, are commonly built using 5456 aluminum plate
Ship System Applications
In addition to primary structures, 5456 aluminum plate is also used in various ship systems:
Pressure vessels and storage tanks: 5456 is particularly suitable for pressure vessels, storage tanks, and piping systems on ships, especially in saltwater environments
Cooling systems: Due to its excellent thermal conductivity and corrosion resistance, 5456 aluminum plate is used in ship cooling systems and heat exchangers
Ventilation and air conditioning systems: 5456 aluminum plate can be used for ship ventilation ducts and air conditioning systems, providing a lightweight and corrosion-resistant solution
Seawater desalination equipment: In ship seawater desalination systems, 5456 aluminum plate performs excellently and resists seawater corrosion
Advantages in Shipbuilding
The main advantages of using 5456 aluminum plate in shipbuilding include:
Weight reduction: Compared to steel, the lightweight nature of 5456 significantly reduces ship weight and improves fuel efficiency
Lower maintenance costs: Excellent corrosion resistance reduces the need for regular maintenance and coating renewal
Improved safety: High toughness and impact resistance enhance the structural safety of ships
Design flexibility: Good formability and weldability allow for more complex ship designs
Other Applications of 5456 Aluminum
Aerospace Applications
Beyond the marine sector, 5456 aluminum plate also plays an important role in the aerospace industry:
Aircraft structural components
5456 aluminum plate is used in aircraft structural parts, especially where high strength and corrosion resistance are required
Fuel systems
Aircraft fuel tanks and piping systems often use 5456 aluminum plate due to its excellent corrosion resistance and weldability
Spacecraft components
In certain spacecraft applications, 5456 aluminum plate is adopted for its lightweight and high strength characteristics
Cryogenic containers
5456 maintains good performance in low-temperature environments, making it suitable for liquid oxygen and liquid hydrogen containers
Land Transportation Applications
Applications of 5456 aluminum plate in the land transportation sector include:
- Rail Vehicles: 5456 aluminum plates are used in the body structure and interior decoration of subways, light rail, and high-speed trains
- Automobile Manufacturing: Used for automobile body structural parts, chassis components, and decorative parts, offering lightweight and corrosion resistance
- Pressure Vessels: Compressed natural gas (CNG) and liquefied petroleum gas (LPG) tanks on trucks and buses are often made with 5456
- Refrigerated Trucks and Containers: 5456 aluminum plate is used for refrigerated trucks and containers, providing good thermal insulation and corrosion resistance
Architecture and Infrastructure
In the fields of architecture and infrastructure, 5456 aluminum plate is also widely used:
Building Facades
5456 aluminum plates are used for building facades and curtain wall systems, offering aesthetic appeal and long-lasting protection
Roof Structures
In coastal area buildings, 5456 aluminum plate is an ideal choice for roof structures due to its resistance to salt spray corrosion
Bridge Structures
Used in structural components and decorative parts of sea-crossing and coastal bridges
Public Facilities
Commonly used in public facilities of coastal cities, such as railings, signage, and bus shelters, made with 5456 aluminum plates
Industrial and Special Applications
5456 aluminum plate also performs excellently in various industrial and special applications:
- Chemical Equipment: Used in the chemical industry for reactors, storage tanks, and piping systems, especially in corrosive environments
- Pressure Vessels: High-pressure gas and liquid containers, such as fire extinguishers and industrial gas tanks
- Cryogenic Equipment: Equipment and containers operating in cryogenic environments, such as those related to liquefied natural gas (LNG)
- Military Applications: Structural parts and protection systems of military vehicles, naval vessels, and equipment
5456 Aluminum Plate Processing Techniques
Forming Processes
5456 aluminum plate can be processed into desired shapes through various forming techniques:
- Rolling Process: 5456 aluminum plates are primarily produced through hot and cold rolling processes, providing different thicknesses and surface qualities
- Extrusion Forming: 5456 alloy can be extruded into various profiles and tubes
- Bending Forming: In appropriate temper conditions, 5456 aluminum plates can undergo cold or hot bending
- Stamping Forming: Medium-strength 5456 aluminum plates are suitable for various stamping and deep drawing processes
Joining Processes
5456 aluminum plates can be joined by various methods, mainly including:
Welding Processes
5456 aluminum plates can be welded using various methods, among which:
Gas Tungsten Arc Welding (GTAW/TIG) is the most commonly used method, providing high-quality welds
Gas Metal Arc Welding (GMAW/MIG) is suitable for automated welding and thicker plates
Resistance spot welding is suitable for joining thin plates
Mechanical Joining
In some cases, bolting and riveting are also feasible options
Adhesive Bonding
Structural adhesives can be used for bonding, offering good sealing and corrosion resistance
Surface Treatments
Surface treatment of 5456 aluminum plate can further enhance its performance and aesthetics:
Anodizing: Anodizing creates a thick and dense oxide film, significantly improving corrosion and wear resistance
Painting and Coating: Various organic coatings provide additional corrosion protection and decorative effects
Chemical Conversion Coating: Treatments such as chromate or chromate-free processes can enhance paint adhesion and corrosion resistance
Mechanical Surface Treatment: Processes like sandblasting, polishing, and brushing achieve different surface textures and visual effects
Heat Treatment and Cold Working
The heat treatment and cold working characteristics of 5456 aluminum plate are as follows:
Annealing
Full annealing (O temper) achieves maximum ductility and minimum strength
Cold Work Hardening
Strength can be improved through cold working processes such as cold rolling and drawing
Stabilization Treatment
After cold working, low-temperature annealing (stabilization treatment) achieves specific temper states
Notes
5456 aluminum alloy cannot be strengthened by heat treatment (such as quenching and aging), which is a major difference from heat-treatable alloys
As a high-performance aluminum-magnesium alloy, 5456 aluminum plate occupies an important position in shipbuilding, marine engineering, aerospace, and other demanding applications due to its excellent corrosion resistance, high strength, and good processability. Its high magnesium content (5.8–6.8%) and the addition of manganese and chromium provide exceptional seawater corrosion resistance and mechanical properties.
When selecting 5456 aluminum plate, the following factors should be considered based on specific application requirements:
- Temper Selection: Choose the appropriate temper based on strength, formability, and corrosion resistance needs. For example, H116 is suitable for marine environments, while O temper is ideal for maximum formability
- Thickness Selection: Select the proper thickness based on load requirements and application environment. Common thickness ranges from 0.012 inches to 14.0 inches
- Processing Technique Selection: Consider forming and joining methods to ensure compatibility with material characteristics
- Surface Treatment Needs: Choose appropriate surface treatment based on the severity of the corrosion environment
With its unique combination of properties, 5456 aluminum plate has become an ideal solution for marine engineering, shipbuilding, and other high-demand applications, offering lightweight, high strength, and corrosion-resistant performance.
Why choose 5456 for marine grade aluminum plate?
5456 aluminum is ideal for marine and aerospace applications that require a balance of strength, corrosion resistance, and weldability. Haomei Aluminum supplier offers customized sizes (thickness: 3-50 mm, width: ≤3600 mm), and has obtained global project certifications.
- Corrosion resistance: Marine environments are notorious for their corrosive nature, and salt water is particularly harsh. 5456 aluminum plate/sheet has excellent corrosion resistance under these conditions, making it ideal for marine structures, ships and offshore platforms. This resistance is mainly due to the alloying elements used in its composition.
- Strength: 5456 aluminum alloy has good strength properties, allowing it to withstand harsh marine environments. While not as strong as other aluminum alloys such as 5083, it is strong enough for many marine applications. The strength of the material makes it suitable for use in structural components such as hulls, masts and superstructures.
- Weldability: Weldability is a critical factor in marine applications as structures often require complex fabrication and repair. 5456 Aluminum has good weldability, enabling strong and durable welded joints to be formed without compromising its corrosion resistance. Optimum results require proper welding techniques and filler materials that are compatible with 5456 alloy.
- Formability: Marine grade aluminum should be easily formable to accommodate various manufacturing processes and design requirements. This property of 5456 aluminum alloy is crucial for the production of components with complex geometries, such as boat hulls and marine fittings.
Comparison of 5456 Aluminum Plate with Other Alloys
| Comparison with other alloys | Description |
| Compared to 5083-H116 | 5456 aluminum alloy has higher strength than 5083-H116 alloy, but similar corrosion resistance in marine environments. While both exhibit excellent corrosion resistance, especially in seawater and humid conditions, the strength advantage of 5456 makes it more attractive for applications requiring higher load-bearing capacity, making it suitable for shipbuilding and other structural applications. |
| Compared to 6061-T6 | 5456 aluminum alloy has superior corrosion resistance in marine environments compared to 6061-T6 alloy. Especially in seawater and humid conditions, 5456 demonstrates stronger resistance to corrosion, while 6061-T6, with its lower magnesium content, is less resistant. However, 5456 has lower machinability, and 6061-T6 performs better in processing, welding, and forming, making it more suitable for some mechanical and structural applications. |
| Compared to 7075-T6 | 5456 aluminum alloy has lower strength than 7075-T6 alloy but performs better in weldability and corrosion resistance. 7075-T6 is known for its high strength and is commonly used in aerospace, but it has poor weldability and corrosion resistance, especially in marine environments. In contrast, 5456 aluminum alloy, with its excellent corrosion resistance and better weldability, is suitable for applications requiring high durability and strong joints, such as ships and marine structures. |
5456 Specification for Heat Treatment of Marine Aluminum Alloys
5456 Marine Grade Aluminum Plate Sheet is an aluminum-magnesium rust-proof aluminum plate with a strength equivalent to 5A03. Generally used for structural applications, it can be cold worked to produce higher strength. When stored for a long time at temperatures above 65°C, it is prone to spalling and corrosion.
- Homogenization annealing: heating to 480~495℃; holding for 12~14h; furnace cooling.
- Complete annealing: heating to 390~430℃, holding time 30~120min, furnace cooling to 300℃, and air cooling.
- Rapid annealing: heating 350~370℃; holding time 30~120min; air cooling.
- Quenching and aging: Quenching at 495~505℃, water cooling, artificial aging at 185~195℃, 6~12h, air cooling, natural aging: 96h at room temperature.
5456 Aluminum Plate Advantages and Considerations
5456 Aluminum Plate Advantages
- Corrosion Resistance: Performs excellently in saltwater and humid environments, making it more popular in marine applications.
- Strength: Higher strength compared to similar alloys (e.g., 5083), suitable for load-bearing applications.
- Weldability and Formability: Good weldability, easy to manufacture, thereby reducing the overall weight of structures like ships.
5456 Aluminum Plate Limitations
Stress Corrosion Sensitivity: Despite its high strength, the alloy may be more susceptible to stress corrosion when exposed to certain conditions (e.g., prolonged exposure to temperatures above 65°C).
Considerations
- Cannot be heat treated; strength is achieved through cold working.
- Avoid prolonged exposure to temperatures above 65°C to prevent corrosion degradation.
5456 aluminum plate is a strong, corrosion-resistant material that is ideal for marine and structural applications. Its composition (primarily aluminum, with a high magnesium content) results in a material that is both strong and weldable, but attention must be given to stress corrosion and temperature exposure. It meets international standards, making it a reliable choice for high-performance applications in the maritime and aerospace industries.
Precautions for purchasing 5456 marine grade aluminum plate
- Grade certification: Verify whether the aluminum plate meets the 5456 marine grade standard. This ensures that the material has the properties needed to withstand the marine environment.
- Thickness: Determine the aluminum plate thickness required for the application.
- Alloy composition: Understand the alloy composition of 5456 aluminum, which usually contains magnesium as the main alloying element. This composition provides excellent corrosion resistance and strength, which are critical for marine applications.
- Corrosion Resistance: Confirm that aluminum plate has excellent corrosion resistance as this is one of the main reasons to choose marine grade aluminum. The panels should be resistant to salt water corrosion common in marine environments.
- Surface finish: Consider the surface finish of the aluminum plate. Depending on the requirements, boards may be required with a specific surface finish, such as ground or polished, for aesthetic or functional purposes.
- Cost and Budget: Consider the cost of aluminum panels and make sure it fits your budget. While quality is crucial, it is also important to find a balance between quality and cost-effectiveness.
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