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5456 Aluminum Sheet is a high-strength, corrosion-resistant alloy from the 5xxx series (Al-Mg), widely used in marine, transportation, and structural applications. Composed primarily of 4.7–5.5% magnesium with minor manganese and chromium, 5456 exhibits excellent resistance to seawater and atmospheric corrosion while maintaining good weldability. Unlike heat-treatable aluminum alloys, its strength is achieved through cold working and tempering.
The sheet is available in various tempers, including O (annealed), H111, H112, H32, H34, and H116, providing flexibility in mechanical properties to meet specific engineering requirements. Thickness typically ranges from 0.2 mm to over 200 mm, with standard widths of 1000–2000 mm and lengths from 2000–8000 mm, customizable to application needs. Common surface finishes include mill finish, polished, brushed, checkered patterns, and optional anodizing for enhanced durability or decorative purposes.
Manufactured to international standards such as ASTM B209, ASTM B221, and MIL-S-24149/2, 5456 Aluminum Sheets are certified for marine and aerospace use, including ABS and DNV approvals. Its combination of high tensile strength, excellent corrosion resistance, and weldability makes it ideal for ship decks, marine structures, fuel tanks, and other demanding structural components.
| Alloy | 5456 (Al-Mg, 5000 series) |
| Temper | O, H111, H112, H32, H34, H116 |
| Thickness | 0.2 mm – 203.2 mm (typical range 1.3 mm – 50 mm for sheet/plate) |
| Width | 1000 mm – 2000 mm |
| Length | 2000 mm – 8000 mm |
| Surface Finish | Mill finish, polished, brushed, checkered pattern, anodized (optional) |
| Standard | ASTM B209, ASTM B221, MIL-S-24149/2, QQ-A-250/9 |
| Application | Marine structures, ship decks, transportation, fuel tanks, aerospace components |
| Alloy | Temper | Thickness (mm) | Width (mm) | Length (mm) | Surface Finish | Standard |
|---|---|---|---|---|---|---|
| 5456 | O | 2.0 | 1500 | 4000 | Mill Finish | ASTM B209 |
| 5456 | H111 | 3.0 | 1600 | 4500 | Brushed | ASTM B209 |
| 5456 | H32 | 4.0 | 1500 | 5000 | Polished | ASTM B209 |
| 5456 | H116 | 6.0 | 1800 | 6000 | Checkered | ASTM B209 |
| 5456 | H112 | 8.0 | 2000 | 7000 | Mill Finish | ASTM B209 |
| 5456 | O | 10.0 | 1500 | 8000 | Brushed | ASTM B209 |
| 5456 | H32 | 12.0 | 1600 | 5000 | Polished | ASTM B209 |
| 5456 | H116 | 15.0 | 1800 | 6000 | Checkered | ASTM B209 |
Marine and Shipbuilding – decks, hulls, and structural components exposed to seawater due to its excellent resistance to corrosion in marine environments.
Transportation – truck bodies, trailers, and rail cars where lightweight and high-strength materials are needed.
Aerospace Components – fuel tanks, structural panels, and other parts requiring both strength and corrosion resistance.
Structural Applications – bridges, platforms, and industrial structures exposed to outdoor or humid environments.
Specialty Applications – chemical equipment, pressure vessels, or any application where a combination of corrosion resistance, weldability, and moderate strength is required.
High Strength – Among 5xxx series alloys, 5456 offers higher tensile and yield strength, especially in cold-worked tempers like H32 and H116.
Excellent Corrosion Resistance – Outstanding resistance to atmospheric and seawater corrosion, making it ideal for marine and coastal applications.
Good Weldability – Easily welded using common techniques without significant loss of corrosion resistance or strength.
Non-Heat-Treatable – Strength is achieved through cold working rather than heat treatment; typical tempers include O, H111, H112, H32, H34, and H116.
Versatile Surface Finishes – Available in mill finish, polished, brushed, checkered patterns, and optional anodized finishes for decorative or enhanced corrosion protection.
Dimensional Flexibility – Supplied in a wide range of thicknesses (0.2 mm–203.2 mm), widths (1000–2000 mm), and lengths (2000–8000 mm), suitable for diverse engineering needs.
Lightweight – Density around 2.66 g/cm³, providing strength-to-weight efficiency for transportation and structural applications.
Standards-Compliant – Manufactured according to ASTM B209 and other international standards, ensuring reliable mechanical properties and quality.
