The GNEE 5083 aluminum plate, widely installed along a ship's perimeter, is specifically designed for porthole manufacturing. To withstand the harsh marine environment, it is essential to use this high-performance aluminum alloy, known for its excellent corrosion resistance and superior anti-rust properties. GNEE's 5083 aluminum plate maintains its mechanical strength after welding, offers high strength with low-ductility fracture resistance, and demonstrates outstanding durability in marine conditions. GNEE also provides customized ship window sizes to meet the unique design requirements of different vessels and structures.
When selecting aluminum alloys for portholes, the choice depends on the application environment and size. For instance, 5083 aluminum plates are typically used for large portholes or those exposed to harsh marine conditions, while 6061 aluminum plates are more suitable for small to medium portholes on ships operating in milder waters. The final selection is based on porthole dimensions, marine exposure, and specific vessel requirements. GNEE welcomes customized orders tailored to your project needs.

Key Features of GNEE 5083 Aluminum Plate for Ship Portholes
Excellent corrosion resistance
Superior welding performance
High strength-to-weight ratio
Lightweight and durable
Easy to process and fabricate
Applications of GNEE 5083 Aluminum Plate in Ship Portholes
Porthole Frames:
GNEE 5083 aluminum plate can be precisely fabricated into frames of various shapes and sizes. Its high strength and corrosion resistance ensure long-term structural stability in marine environments.
Glass Installation Brackets:
Used to support and secure porthole glass, the 5083 aluminum plate provides reliable strength and excellent resistance to deformation, ensuring a secure fit and long service life.
Porthole Surface Decoration:
The alloy's attractive finish and anti-corrosion performance make it ideal for decorative outer rings or trims, enhancing both aesthetic appeal and durability.
Sealing Gasket Supports:
5083 aluminum supports ensure a tight and stable seal between the porthole and hull structure, enhancing waterproofing and overall durability during long-term maritime use.
As a leading Chinese supplier, GNEE delivers high-quality 5083 aluminum plates specifically engineered for marine-grade porthole applications, ensuring optimal performance and reliability at sea.
Specification of 5083 Aluminum Plate for Ship Porthole
| Alloy | 5083 |
| Temper | O, H111, H112, H116, H24, H32, H321 |
| Thickness (mm) | 1.50-120 |
| Width (mm) | ≤3100 |
| Length (mm) | 1000-16000 |
| Certificate | DNVGL, ABS, LR, CCS |
| Surface treatment | Anodizing, spraying or other surface treatment |
Chemical Composition
| Alloy | Si | Fe | Cu | Mn | Mg | Cr | Ni | Zn | Ti | Zr | AL |
| 5083 | 0.40 | 0.40 | 0.10 | 0.40-1.00 | 4.00-4.90 | 0.05-0.25 | – | 0.25 | 0.15 | – | Remainder |
Mechanical Properties
| Alloy | Temper | Tensile strength Rm (MPa) | Yield strength Rp0.2 (MPa) | Elongation A (%) |
| 5083 | O/H111/H112 | ≥275 | ≥125 | ≥16 |
| H116 | ≥305 | ≥215 | ≥10 | |
| H321 | 305-385 | 215-295 | ≥12 |








