5083 aluminum plates have become a standard material in the global shipbuilding industry. This alloy is widely specified for hulls, decks, superstructures, and other critical vessel components due to its combination of corrosion resistance, strength, and weldability.
We supply 5083 aluminum plates with full certification from major classification societies, ensuring compliance with international marine standards.
What Makes 5083 the Preferred Marine Alloy?
5083 is a non-heat-treatable aluminum-magnesium alloy from the 5000 series. Its magnesium content (4.0–4.9%) provides inherent corrosion resistance in seawater environments. The dense oxide film that forms on the aluminum surface effectively blocks chloride ion erosion from seawater.
Key characteristics:
- Excellent resistance to seawater corrosion
- Good weldability with suitable filler alloys
- High strength-to-weight ratio
- Good low-temperature toughness
- Non-heat-treatable, strengthened by cold working
In long-term real-sea exposure tests, the corrosion rate of 5083 in splash and immersion zones is significantly lower than that of steel. This property extends hull service life and reduces maintenance costs.
Available Tempers and Mechanical Properties
5083 plates are available in several tempers, each suited for different applications:
| Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Key Feature |
|---|---|---|---|---|
| O | 275–350 | ≥125 | ≥16 | Annealed, best formability |
| H111 | 275–350 | ≥125 | ≥16 | Annealed and slightly strain-hardened |
| H116 | ≥305 | ≥215 | ≥10 | High strength, stress corrosion resistant |
| H321 | 305–385 | 215–295 | ≥10–12 | Stabilized, excellent post-weld stress corrosion resistance |
Temper selection guidance:
- H116 is suitable for structural parts requiring prolonged exposure to seawater, such as hulls and decks
- H321 maintains excellent stress corrosion resistance after welding, suitable for marine engineering and high-end shipbuilding projects
- O and H111 are used for forming operations where maximum formability is required
Certification by Classification Societies
For marine applications, material certification is a mandatory requirement. Plates used in hull construction and critical structural components must be traceable and certified by authorized classification societies.
We supply 5083 plates with the following certifications:
- CCS (China Classification Society)
- ABS (American Bureau of Shipping)
- DNV (Det Norske Veritas)
- LR (Lloyd‘s Register)
- BV (Bureau Veritas)
Chemical Composition
| Element | Percentage (%) |
|---|---|
| Copper | 0.10 max |
| Magnesium | 4.0 – 4.9 |
| Silicon | 0.40 max |
| Iron | 0.40 max |
| Manganese | 0.40 – 1.00 |
| Zinc | 0.25 max |
| Chromium | 0.05 – 0.25 |
| Titanium | 0.15 max |
Key Applications
5083 aluminum plates serve a wide range of marine applications:
- Hulls and side plates – Primary structural components in contact with seawater
- Decks and deckhouses – Structural and non-structural deck components
- Engine pedestals – Supporting structures for main engines
- Frames and stiffeners – Internal structural members
- Keel sections – Main structural member along the vessel bottom
- LNG storage tanks and pressure vessels – Low-temperature applications (O temper)
- Offshore platforms – Components exposed to harsh marine environments
Stock Inventory – 5083 Marine Aluminum Plates
5083-H116
| Thickness (mm) | Width (mm) | Length (mm) |
|---|---|---|
| 3 | 2000 | 8000 / 6000 |
| 4 | 2000 | 8000 / 6000 |
| 5 | 2000 | 8000 / 6000 |
| 6 | 2000 | 8000 / 6000 |
| 7 | 2000 | 8000 / 6000 |
| 8 | 2000 | 8000 / 6000 |
| 9 | 2000 | 8000 / 6000 |
| 10 | 2000 | 8000 / 6000 |
| 12 | 2000 | 8000 / 6000 |
| 14 | 2000 | 8000 / 6000 |
| 15 | 2000 | 8000 / 6000 |
| 16 | 2000 | 8000 / 6000 |
| 20 | 2000 | 8000 / 6000 |
| 25 | 2000 | 8000 / 6000 |
| 30 | 2000 | 8000 / 6000 |
| 35 | 2000 | 8000 / 6000 |
| 40 | 2000 | 8000 / 6000 |
5083-H111 / 5083-O
| Thickness (mm) | Width (mm) | Length (mm) |
|---|---|---|
| 3 | 2000 | 8000 / 6000 |
| 4 | 2000 | 8000 / 6000 |
| 5 | 2000 | 8000 / 6000 |
| 6 | 2000 | 8000 / 6000 |
| 8 | 2000 | 8000 / 6000 |
| 10 | 2000 | 6000 |
Additional Stock – 5052 Aluminum Plates
5052-H32
| Thickness (mm) | Width (mm) | Length (mm) |
|---|---|---|
| 2.5 | 1500 | 6000 |
| 3.5 | 1500 | 6000 |
| 4 | 1500 | 6000 |
5052-H32 / 5052-O
| Thickness (mm) | Width (mm) | Length (mm) |
|---|---|---|
| 4 | 1500 | 6500 |
| 5 | 1500 | 6000 |
Additional Stock – Aluminum Tread Plate (Five-Bar Pattern)
5052-H114
| Thickness (mm) | Width (mm) | Length (mm) |
|---|---|---|
| 3 | 1500 | 6000 |
| 4 | 1500 | 6000 |
| 5 | 1500 | 6000 |
Quality Assurance
Each plate is manufactured and tested to meet international standards:
- Standards: ASTM B209, EN 485, or customer-specified requirements
- Documentation: Mill test certificates showing chemical composition and mechanical properties
- Traceability: Heat number tracking from casting to final plate
- Marking: Each plate is stamped with classification society mark, heat number, alloy, temper, and dimensions
Fabrication Considerations
Welding:
- ER5183 or ER5356 filler alloys are recommended for 5083
- MIG welding is the most common process
- Preheat is generally not required for plates under 50mm thickness
Forming:
- Good cold formability for moderate bends
- O temper material may be required for tight radius bends
Machining:
- Sharp tools and adequate cooling are recommended
Why Choose 5083 for Marine Projects?
| Advantage | Description |
|---|---|
| Proven reliability | Decades of use in vessel construction worldwide |
| Certification ready | Available with major classification society approval |
| Corrosion resistant | Self-protecting against seawater without painting |
| Lightweight | One-third the density of steel |
| Weldable | Good crack resistance during weldin |
Supporting Vessel Construction Projects
We have supplied certified marine aluminum plates to shipyards, repair facilities, and offshore fabricators globally. With a comprehensive stock of 5083, 5052, and tread plates in various thicknesses and sizes, we are ready to support your vessel construction or repair project.
Need certified marine aluminum plates for your next project? Contact us today with your alloy, temper, thickness, and certification requirements for a competitive quote.
