If you are building ships, marine vessels, or pressure vessels, you already know that choosing the right material is critical. A bad batch of aluminum can lead to structural failure, failed inspections, and massive financial losses.
At GNEE, we have supplied marine aluminum for over a decade. We talk to shipyard procurement managers every day. We know you don't just want a generic product description-you need real data on 5083 Aluminum Plate, accurate pricing trends, and reliable supply chain insights.
In this guide, we will break down everything you need to know before you place your next order.
1. What Are the Core 5083 H116 Aluminum Properties?
When engineers specify marine aluminum, they almost always point to the H116 or H321 tempers.
Why? Because the ocean is a brutal environment, and 5083 is an Al-Mg (Aluminum-Magnesium) alloy designed specifically to resist seawater corrosion.
Let's look at the exact 5083 H116 aluminum Properties. The H116 temper means the alloy has been strain-hardened and stabilized to prevent intergranular corrosion, which is a common problem in marine environments.
Mechanical Properties of 5083 Aluminum (H116 vs H321 vs O)
| Alloy & Temper | Tensile Strength (Rm / MPa) | Yield Strength (Rp0.2 / MPa) | Elongation (%) | Best Application |
| 5083 H116 | ≥ 305 | ≥ 215 | ≥ 10 | Boat hulls, underwater structures |
| 5083 H321 | 305 - 385 | 215 - 295 | ≥ 10 | Upper structures, marine components |
| 5083 O | 275 - 350 | 125 - 200 | ≥ 16 | Deep drawing, bending parts |
Data source: General marine classification society standards. Actual MTC data from GNEE may vary slightly based on specific thickness.
Technical Takeaway: If you need to weld the hull plates of a workboat, H116 gives you the perfect balance of yield strength and anti-corrosion performance.
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5083-H321 and 5083 O Aluminum Applications
While H116 is famous for hulls, you will encounter other tempers in blueprints.
5083-H321: This temper is very similar to H116 in terms of strength, but the stabilization process is slightly different. It is widely used in shipbuilding for decking and upper superstructures.
5083 O Aluminum: The "O" stands for annealed. It is fully soft. You use this when you need extreme formability, such as deep-drawn pressure vessels, fuel tanks, or complex curved parts on a yacht. You lose strength, but you gain workability.
2. Why Specify Marine Grade Aluminium 5083 Over Other Alloys?
A common question we get from buyers is, "Can I use 5052 or 5086 instead to save money?"
The short answer is: It depends on the boat, but for commercial marine use, Marine grade Aluminium 5083 is the absolute standard.
- 5083 vs. 5052: 5052 has lower magnesium content. It is easier to bend but significantly weaker. We only recommend 5052 for small freshwater leisure boats or interior marine cabins.
- 5083 vs. 5086: 5086 is a good marine alloy, but 5083 has higher tensile strength. If you are building a vessel over 15 meters or a commercial ferry, marine surveyors (like DNV or ABS) will look for 5083.
Using marine grade 5083 ensures that your vessel passes strict classification society inspections and has a lifespan that justifies the initial material investment.
3. Understanding the 5083 Aluminum Sheet Price Per Ton
Let's talk about money. If a supplier gives you a fixed, long-term price for aluminum, be careful. The 5083 Aluminum Sheet price is never static. It is calculated based on a clear formula:
Formula: LME Aluminum Ingot Price + Mill Processing Fee + Transport Cost = Final Price per Ton
Here is what actually affects your purchasing cost:
- Thickness: Standard plates (3mm to 12mm) have standard processing fees. Ultra-thick plates (up to 50mm) require specialized hot rolling equipment, which increases the processing cost.
- Temper Differences: Getting the H116 or H321 temper requires strict temperature control and stabilization processes. Therefore, they are naturally more expensive than 5083O Aluminum (the annealed, soft state).
- Certifications: If your project requires DNV, ABS, LR, or CCS stamping directly on the plates, the mill charges extra for the certification process.
Current Price Estimate: While LME prices fluctuate daily, you can generally expect the base price of 5083 marine plates to range from $2,800 to $3,500 per metric ton, depending on the specs and order volume.
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4. How to Evaluate 5083 Aluminum Plate Suppliers
When you evaluate 5083 Aluminum Plate suppliers, use this checklist:
- Real Marine Certifications: Do they just say "marine grade," or can they provide DNV, ABS, or BV certificates upon request? GNEE provides fully certified plates tailored to your shipyard's requirements.
- Packaging Standards: Aluminum oxidizes if exposed to seawater during shipping. Look for suppliers who use export-standard wooden pallets with waterproof craft paper and desiccant.
- MTC Transparency: A real factory or direct distributor will never hide their Mill Test Certificate.
At GNEE, we control the quality from the rolling mill to your local port, ensuring that the chemical composition (like the strict control of Mg, Mn, and Cr) matches exactly what your engineers asked for.
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