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Explore a wider range of 5456 aluminum sheet sizes that meet ASTM B209 standards, with sample testing available and 1 ton minimum order. Get pricing information now
5456 aluminum sheet is a high-magnesium aluminum alloy containing approximately 4.7%–5.5% magnesium. It belongs to the non-heat-treatable aluminum-magnesium alloy series and is valued for its high strength, excellent weldability, strong corrosion resistance, and good plasticity.
Small additions of manganese and chromium further enhance its performance. These elements help inhibit surface corrosion, especially in humid conditions or seawater environments, making the alloy highly reliable for long-term use. Compared with other non-heat-treatable aluminum alloys, 5456 aluminum offers higher tensile strength and superior fatigue resistance.
Because its mechanical strength can only be increased through cold working, tempers such as 5456 H116 aluminum sheet are widely used. This temper meets strict marine engineering standards and performs well in demanding offshore and shipbuilding applications. As a result, 5456 aluminum sheet is recognized as one of the most commonly used marine-grade aluminum alloy sheets for structures that require durability, strength, and corrosion resistance.
Outstanding Mechanical Strength
5456 aluminum plate is classified as a high-strength alloy within the 5000 series. Its magnesium-rich composition provides excellent load-bearing capability, making it suitable for demanding structural applications where strength and reliability are required.
Superior Corrosion Resistance
This alloy offers strong resistance to corrosion caused by sodium chloride (NaCl) and other chemical media. Its stable surface oxide layer and controlled alloying content help protect the material in harsh environments, especially in marine and coastal conditions.
Excellent Weldability
5456 aluminum plate supports common welding methods with minimal loss of mechanical performance. Structural parts can be reinforced through appropriate tempering or welding processes while maintaining overall stability and durability.
Good Plasticity and Impact Resistance
With high elongation and toughness across different tempers, 5456 aluminum plate performs well under impact and deformation. It is well suited for structural components used in marine engineering, shipbuilding, and other applications exposed to dynamic loads and challenging environments.
| Alloy Grade | 5456 Aluminum Alloy |
| Aluminum Series | 5000 Series (Al-Mg Alloy) |
| Temper / Condition | O (Annealed), H111, H112, H116*, H321* |
| Thickness | 3.0 mm – 50.0 mm (custom thickness available) |
| Width | 1000 – 2500 mm (standard: 1250 / 1500 / 2000 mm) |
| Length | 2000 – 8000 mm (standard: 2500 / 3000 / 6000 mm) |
| Form | Aluminum Sheet / Aluminum Plate |
| Manufacturing Process | Hot Rolled / Cold Rolled |
| Standards | ASTM B209, ISO 6361, EN 485-2, EN 573-3 |
| Marine Certification (Optional) | ABS, DNV, BV, CCS (on request) |
| Surface Treatment | Mill Finish, Anodized, Brushed, Polished, Protective Film |
| Heat Treatment | Non-Heat Treatable |
| MOQ | Negotiable |
| Customization | Size cutting, surface treatment, testing certificates |
| Aluminum (Al) | Balance |
| Magnesium (Mg) | 4.5 – 5.6 |
| Manganese (Mn) | 0.5 – 1.0 |
| Chromium (Cr) | 0.05 – 0.20 |
| Iron (Fe) | ≤ 0.50 |
| Silicon (Si) | ≤ 0.10 |
| Copper (Cu) | ≤ 0.10 |
| Zinc (Zn) | ≤ 0.25 |
| Titanium (Ti) | ≤ 0.20 |
| Others (Each) | ≤ 0.05 |
| Others (Total) | ≤ 0.15 |
5456 aluminum sheet is a high-magnesium content aluminum-magnesium alloy, suitable for high-strength and corrosion-resistant structural applications.
