If you are a shipyard procurement manager or a marine engineering contractor, material failure is not an option. Seawater is an unforgiving environment. When specifying hull materials, you need an alloy that guarantees exceptional corrosion resistance, reliable yield strength, and classification society approval.
At GNEE, we supply marine-grade aluminum to global shipbuilders daily. We don't just sell metal; we provide technical certainty. In this guide, we compare tempers, analyze properties, and explain how to source the right 5083 H116 Aluminum plate for your next vessel.
1. What is 5083 H116 aluminum?
5083-H116 is a marine-grade, strain-hardened aluminum alloy designed for excellent corrosion resistance in seawater environments.
Unlike 6000 series aluminum, 5083 cannot be strengthened by heat treatment. Instead, the "H116" designation means the metal has been strain-hardened and stabilized. This specific processing is engineered to prevent exfoliation corrosion (where the metal flakes apart in layers) and intergranular corrosion (IGC), which are the two biggest threats to boat hulls in saltwater.
2. Core 5083 H116 aluminum Properties and Density
To pass marine surveyor inspections (such as DNV, ABS, or LR), the material must meet strict mechanical and physical baselines. Here is the verified data for standard 5083-H116 plates.
5083 H116 aluminum Mechanical & Physical Properties Table
| Property Type | Parameter | Value / Description |
| Mechanical | Tensile Strength (Rm) | 305 – 385 MPa |
| Mechanical | Yield Strength (Rp0.2) | ≥ 215 MPa |
| Mechanical | Elongation | ≥ 10% |
| Physical | Aluminium 5083 density kg m3 | ≈ 2650 kg/m ³ |
| Performance | Exfoliation Corrosion | Excellent resistance |
| Performance | Intergranular Corrosion (IGC) | Excellent resistance |
What about 5083 Aluminum machinability?
Machining 5083 is rated as "moderate." Because it is relatively soft and gummy compared to heat-treated alloys like 6061, it can stick to cutting tools.
Pro Tip from GNEE: For optimal 5083 Aluminum machinability, we recommend using high-speed cold processing, sharp carbide-tipped tools, and generous amounts of proper cutting lubrication to prevent chip buildup.
3. 5083-H116 vs H321: Which is Better for Marine Use?
This is the most common question we receive from naval architects. Both are premium marine tempers, but they are processed differently.
- 5083-H116: Primarily strain-hardened to achieve its specific mechanical properties and corrosion resistance. It is the global standard for outer boat hulls and underwater structures.
- 5083-H321: It undergoes strain hardening followed by a specific thermal stabilization treatment. This provides slightly better long-term stability against magnesium precipitation at grain boundaries.
Side-by-Side Comparison
| Feature | 5083-H116 | 5083-H321 |
| Processing | Strain-hardened | Strain-hardened + Stabilized |
| Corrosion Resistance | Excellent | More stable over extreme long-term use |
| Primary Application | Ship hulls, bulkheads | High-end marine vessels, upper superstructures |
Conclusion: If your blueprint calls for general commercial shipbuilding (ferries, workboats), H116 is highly cost-effective and perfectly reliable. If you are building extreme-environment vessels, engineers might specify H321.
4. What is 5083 H112 and 5083-H32?
Sometimes, you don't need the extreme hardness of H116. You might see other tempers on your BOM (Bill of Materials).
What is 5083 H112? This is a hot-worked temper. It has a partially annealed condition. You sacrifice some strength, but you gain excellent formability. It is often used for forged parts or heavy structural components that require bending.
What is 5083-H32? This is a quarter-hard temper. It offers moderate strength and is frequently used for internal structural components, flooring, or non-critical marine parts where the cost of H116 processing isn't necessary.
5. GNEE 5083 Aluminum for sale
At GNEE, we eliminate supply chain risks. We maintain robust stock levels of certified marine plates ready for global shipping.
GNEE Supply Capabilities:
- Thickness: 3mm up to 50mm (Ultra-thick plates available via hot rolling).
- Width & Length: Standard 4x8, 5x10, or custom cut-to-size (e.g., 2000mm x 6000mm) to minimize your shipyard's scrap rate.
- Certifications: DNV, ABS, LR, BV, CCS,KR stamped directly on the plates.
- Export Packaging: We use heavy-duty wooden pallets, waterproof craft paper, and industrial desiccants to ensure zero saltwater oxidation during ocean freight.
Whether you need a few tons for a yacht repair or a bulk contract for an LNG carrier, we have the capacity.
Get your 5083 Aluminum Plate price directly from GNEE within 24 hours
Technical FAQ: Industry Material Comparisons
When engineers evaluate materials, they often compare the 5000 series family. Here are the definitive answers to your technical questions.
Stop risking your project with unverified metal. Partner with a factory that understands marine engineering.