5086 Aluminum Plate

5086 Aluminum Plate: Properties, Applications, and Technical Overview

1. Alloy Composition and Classification

• Base Alloy: 5086 is an Al-Mg (aluminum-magnesium)alloy belonging to the 5xxx series, known for its corrosion resistance and weldability.

• Key Alloying Elements:

• Magnesium (Mg): 3.5–4.5% (primary strengthening element, enhances corrosion resistance).

• Manganese (Mn): 0.2–0.7% (improves strength and workability).

• Chromium (Cr): 0.05–0.25% (inhibits grain growth and improves stress corrosion resistance).

• Impurities: Silicon (Si ≤ 0.4%), Iron (Fe ≤ 0.5%), Copper (Cu ≤ 0.1%), Zinc (Zn ≤ 0.25%).

• UNS Number: A95086.

2. Mechanical Properties

5086 is non-heat-treatableand relies on cold workingor strain hardeningfor strength. Properties vary by temper:

• Fatigue Strength: ~150 MPa (H116 temper).

• Modulus of Elasticity: 71 GPa.

• Density: 2.66–2.68 g/cm³.

3. Corrosion Resistance

• Marine-Grade Performance: Exceptional resistance to saltwater, atmospheric exposure, and chemical corrosion due to its high Mg content and protective oxide film.

• Stress Corrosion Cracking (SCC): Susceptible under high tensile stressand elevated temperatures(>65°C/150°F). Mitigation strategies include:

• Avoiding high-stress applications in corrosive environments.

• Using low-Mg filler metals (e.g., 5554) for welding in high-temperature scenarios.

• Post-weld stress relief heat treatment.

4. Weldability and Fabrication

• Weldability: Excellent with MIG, TIG, or laser welding. Weld strength retains ~95% of the base material’s properties.

• Formability: Good cold working capabilities (e.g., bending, deep drawing), especially in the O (annealed)temper. Hot working is feasible at 316–482°C (600–900°F).

• Machinability: Moderate; lubricants are recommended for optimal results, particularly in strain-hardened tempers (e.g., H34, H36).

5. Applications

• Marine Industry: Boat hulls, decks, superstructures, and offshore platforms due to saltwater resistance.

• Transportation: Tank trucks, armored vehicles (e.g., M113 APC), and automotive structural components.

• Pressure Vessels: LNG storage tanks (operates at -162°C) and chemical containers.

• Construction: Architectural panels, bridges, and railway carriages.

• Defense: Armor plating and military equipment.

6. Available Tempers and Specifications

• Common Tempers: O, H111, H112, H116, H32, H34, H321.

• Standards: ASTM B209 (plate), ASTM B221 (extrusions), EN 755-2 (European).

• Typical Sizes:

• Thickness: 0.15–600 mm.

• Width: 20–2650 mm.

• Length: 500–16,000 mm.

7. Market Availability and Pricing

• Global Supply: Widely produced by manufacturers like Henan Mingtai Aluminum and Kloeckner Metals.

• 2025 Pricing: ~$2.20–4.50/kg(USD) for standard grades, depending on thickness and temper. Bulk orders may qualify for discounts.

• Lead Times: 7–45 days, with shorter delivery for common tempers (e.g., H116, H32).

8. Comparison with Other Alloys

9. Handling and Storage

• Surface Protection: Anodized or painted for enhanced durability in aggressive environments.

• Storage: Store in dry, well-ventilated areas to prevent moisture-related corrosion.

10. Conclusion

5086 aluminum plate is a versatile, corrosion-resistant alloy suitable for demanding applications requiring a balance of strength, weldability, and lightweight performance. Its marine-grade durability and moderate cost make it a top choice for shipbuilding, transportation, and industrial sectors. Proper temper selection and SCC mitigation are critical for maximizing its lifespan in harsh environments.

The Product Specification