5086 Marine Aluminium Plates
5086 Marine Aluminium Plates are a high-performance alloy known for their excellent corrosion resistance, superior strength, and outstanding weldability, making them an ideal material choice in marine environments. This alloy belongs to the 5xxx series, which is magnesium-based and specially tailored for structural applications subjected to harsh saltwater conditions.
Features of 5086 Marine Aluminium Plates
- Exceptional Corrosion Resistance: Particularly resistive to seawater and salt spray, resulting in extended lifespan in marine environments.
- High Strength: Among the strongest 5xxx alloys, with excellent mechanical properties in annealed and slightly hardened conditions.
- Good Weldability: Can be readily welded by all standard welding methods without significant loss of corrosion resistance.
- Excellent Formability: Good workability enables manufacturing of complex shapes and profiles used in shipbuilding.
- Lightweight: Low density reduces vessel weight, improving fuel efficiency and payload capacity.
Chemical Composition
The chemical composition of Grade 5086 Aluminium Plate defines its outstanding performance. Presented below are the typical elemental ranges:
| Element | Composition (%) |
|---|---|
| Magnesium (Mg) | 4.0 – 4.9 |
| Manganese (Mn) | 0.2 – 0.7 |
| Chromium (Cr) | 0.05 – 0.25 |
| Iron (Fe) | ≤ 0.4 |
| Silicon (Si) | ≤ 0.4 |
| Copper (Cu) | ≤ 0.1 |
| Zinc (Zn) | ≤ 0.25 |
| Titanium (Ti) | ≤ 0.15 |
| Residuals | each ≤ 0.05, total ≤ 0.15 |
| Aluminium (Al) | Balance |
Mechanical Properties
The mechanical performance varies slightly depending on temper designation, generally supplied in H32 (strain-hardened and stabilized) and O (annealed) conditions most suitable for marine usage.
| Property | Condition | Typical Value |
|---|---|---|
| Ultimate Tensile Strength (MPa) | H32 | 313 – 343 |
| O | 275 – 300 | |
| Yield Strength (0.2% offset, MPa) | H32 | 228 – 278 |
| O | 140 – 170 | |
| Elongation (%) | H32 | 12 – 18 |
| O | 20 – 25 | |
| Brinell Hardness (HB) | H32 | 75 – 90 |
| O | 60 – 75 | |
| Density (g/cm³) | — | 2.66 |
| Young’s Modulus (GPa) | — | 70 |
Performance Characteristics
| Performance Aspect | Description | Benefit to User |
|---|---|---|
| Corrosion Resistance | Extra protection in saltwater and marine atmospheres | Reduced maintenance cost, longer service intervals |
| Weldability | Compatible with TIG, MIG, and arc welding methods | Easier fabrication and repairs |
| Formability | Allows bending and rolling without cracking | Facilitates diverse structural designs |
| Strength-to-Weight Ratio | High strength with light weight | Enables lighter marine vessel design for higher efficiency |
| Thermal Conductivity | Moderate (138 W/m·K at 25°C) | Optimizes heat dissipation in marine applications |
Typical Applications
5086 Marine Aluminium Plates are widely utilized in marine and transport sectors:
| Industry/Field | Application Area |
|---|---|
| Shipbuilding | Hull plating, deck plating, superstructures |
| Offshore Structures | Oil platforms, floating rigs |
| Automotive and Transport | Trailer beds, refrigerated truck walls |
| Military & Defense | Naval vessels, amphibious vehicles |
| Chemical Process Industry | Storage tanks needing corrosion resistance |
| Architectural Uses | Façades and roofing in coastal zones |
- Longevity: The high corrosion resistance delays material degradation even after prolonged sea exposure.
- Serviceability: Thanks to good weldability and repair friendly nature, dockside adjustments and maintenance are easier.
- Weight Reduction: Lighter structures translate to fuel savings and increased load capacity.
- Versatility: Applicable in various manufacturing stages – from raw plate to formed or welded finished products.
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