Marine grade aluminum plate is a high-performance material designed specifically for shipbuilding. Marine grade aluminum plate primarily includes 5052, 5083, 5086, 5059, 5754 and 6061 aluminum alloys. These aluminum alloys offer excellent corrosion resistance, strength and weldability, making them suitable for the manufacture of hulls and structural components. As a professional supplier with over a decade of experience in the marine materials industry, our high-quality marine aluminum plate for boat construction utilizes groundbreaking materials science and engineering practices to meet the stringent requirements of shipbuilding, redefining core standards in shipbuilding.

1. Reliable Quality Certification

Our products are certified by major global classification societies such as DNV GL, ABS, CCS, BV, and LR, and are capable of withstanding a variety of extreme environments. For example, in the ultra-low temperature conditions of -163°C on LNG carriers, special processing techniques improve the material's impact toughness by 30% compared to the industry standard, effectively preventing low-temperature embrittlement and providing essential assurance for ship safety.

2. Excellent Material Properties

- Strong Corrosion Resistance

Using a unique dual-phase anodizing process, a 50μm composite oxide film is formed on the material surface. Salt spray testing (ASTM B117) demonstrates a corrosion lifespan of 5,000 hours, 70% longer than that of ordinary 5083 marine aluminum plate. During eight years of live-sea exposure testing in the South China Sea, pitting depth was only 0.12mm, meeting high-grade protection requirements.

- Outstanding Structural Strength

Utilizing a gradient rolling and pre-stretching process, the material achieves a tensile strength of 320MPa, a yield strength of 250MPa, and an elongation of 18%, exceeding the GB/T 3191 standard. Application on a large ro-ro passenger ferry reduced the hull structure's weight by 40% while improving impact resistance by 30%, successfully passing DNV GL's 5m drop hammer impact test.

- Excellent Welding Performance

The company has developed a dedicated low-spatter welding wire, combined with a digital welding parameter model, to achieve weld strengths up to 98% of the parent material, with weld deformation controlled to ±0.5mm/m. This solves the problems of cracking and large deformation associated with traditional aluminum alloy welding. During the welding of the curved deck of a luxury cruise ship, the qualified rate reached 99.7%, shortening the construction period by 25%.

3. Flexible Manufacturing and Delivery

- Strong Customization Capabilities

With an advanced 2650mm wide rolling mill and a 500mm thick plate production line, we can produce oversized marine grade aluminum plates up to 2.65 meters wide and 500mm thick, meeting the specialized structural requirements of large LNG carrier cargo tanks and icebreaker double bottoms. A 300mm thick side plate custom-made for a polar research vessel showed no cracks after a -50°C low-temperature impact test.

- Strict Quality Control

Using an AI-powered visual inspection system, the plate surface defect detection accuracy reaches 0.02mm. Combined with online ultrasonic flaw detection and eddy current testing, each plate is 100% inspected. In a 2024 naval vessel project, the product passed the military's stringent SIL 3 functional safety certification.

- Fast Delivery Response

Leveraging the intelligent scheduling system across four production bases, rapid delivery times of 7-35 days are achieved. In a 2025 emergency rescue vessel conversion project, the entire process from order confirmation to delivery was completed within 15 days, ensuring the vessel's timely deployment.

4. Significant Green Benefits

- Environmentally Friendly and Recyclable

The material has a 95% recyclability rate, and the energy consumption for remelting after scrapping is only 5% of the original production cost. A ferry company demonstrated that after 20 years of service, the recycling value of ships using marine aluminum plate reached 40% of the initial purchase cost, exceeding the 15% for steel.

- Lightweight Advantages

With a density only one-third that of steel, a single ship can reduce weight by 8-100 tons. After modification, a container ship achieved a 15% weight reduction, an 18% drop in fuel consumption, and an annual reduction of 3,000 tons of CO₂, meeting the IMO 2025 EEXI energy efficiency standards.

- Safety and Non-Toxic

It contains no harmful substances such as lead and cadmium, and utilizes a chromium-free passivation process for surface treatment, complying with EU REACH regulations. In an inland cruise project, third-party testing showed that the heavy metal content of the sheet metal leachate was below the detection limit, meeting drinking water contact standards.

Applications:

Our aluminum sheet for boat is widely used in the construction of various vessels, including but not limited to:

- Commercial vessels: such as cargo ships, tankers, and container ships.

- Fishing vessels: Providing durable and efficient hull materials for the fishing industry.

- Yachts and leisure boats: Providing high-end, lightweight, and aesthetically pleasing hull solutions.

- Offshore equipment: Such as platforms and pontoons, suitable for various marine environments.

We offer a wide range of marine aluminum plate for boat construction in various specifications, with thicknesses ranging from 1mm to 20mm, to meet diverse design requirements. Our dedicated team can also provide customized services to ensure your project's needs are fully met. We strictly adhere to international quality standards, and all our products undergo rigorous testing and certification to ensure that every aluminum sheet meets the high standards of shipbuilding.