HAOMEI Aluminum marine grade aluminum plates / sheets are made from high-purity aluminum ingots with alloying elements such as magnesium and manganese. They are processed through precision smelting, hot rolling, cold rolling, annealing, and finishing. Their core advantages come from scientifically controlled alloy composition and strict manufacturing processes. Compared with traditional steel materials, they offer irreplaceable performance advantages.

Irreplaceable Advantages of Marine Grade Aluminum Plate Sheet

1. Excellent corrosion resistance:
   Marine aluminum alloys have strong resistance to seawater corrosion, significantly extending the service life of ships and offshore structures.

2. Lightweight structure:
   Aluminum weighs about one-third of steel, greatly reducing vessel weight, lowering fuel consumption, increasing speed, and improving payload capacity.

3. Excellent weldability:
   Marine aluminum alloys offer superior welding performance, which is critical for shipbuilding and large marine structures.

4. Good machinability:
   They support stamping, bending, shearing, and stretching processes with excellent cold and hot workability.

5. Long service life:
   Compared with steel ships, aluminum vessels require lower maintenance because they do not rust in marine environments.

6. Environmentally friendly:
   Aluminum is 100% recyclable, making it a sustainable material for modern shipbuilding.

Marine Grade Aluminum Alloy Series

HAOMEI Aluminum offers a full range of 5000-series marine aluminum alloys and 6000-series marine aluminum alloys, certified by international classification societies such as DNV, ABS, LR, and BV.

1. 5083 Marine Aluminum Plate

A magnesium alloy (Mg 4.0%–4.9%), known as the "gold standard" for marine applications. It offers excellent seawater corrosion resistance, medium strength, and outstanding weld crack resistance.

• Tensile strength: 275–310 MPa

• Elongation: ≥12%

Applications: hull structures, decks, bulkheads, engine mounts, ship sides. Widely used in cargo ships, fishing boats, yachts, and high-speed vessels.

2. 5086 Marine Aluminum Plate

Magnesium alloy (Mg 4.3%–4.9%) with better corrosion resistance than 5083, good toughness, and excellent stress corrosion resistance.

Applications: fuel systems, seawater tanks, pressure vessels, high-stress marine structural parts, offshore platforms.

3. 5454 / 5456 Marine Aluminum Plate

• 5454: excellent corrosion resistance, ideal for seawater tanks and marine pipelines

• 5456: higher strength than 5083/5086, tensile strength above 305 MPa

• Applications: heavy-duty marine structures, offshore platforms, military vessels, high-load components.

4. 5052 Marine Aluminum Plate

Medium-strength magnesium alloy with good corrosion resistance, weldability, and formability, and relatively low cost.

Applications: small boats, yachts, fishing boats, interior panels, windows, ladders, and marine accessories.

5. 6061 Marine Aluminum Plate

A magnesium-silicon alloy that can be heat-treated for strengthening, offering good mechanical properties and machinability.

It typically has pre-tempered grades, such as 6061-O (annealed), and tempered grades, such as 6061-T6 (solution treatment and artificial aging) and 6061-T651 (solution treatment, stress-relieving tensile treatment and artificial aging).

Applications: superstructures, frames, instrument supports, precision marine components.

Marine Aluminum Plate Technical Parameters

Application Scenarios of Marine Aluminum Plate

International Classification Society Certifications

Marine aluminum plates differ from standard industrial plates due to mandatory third-party marine certification. Without these certifications, materials cannot be used in shipbuilding.

HAOMEI Aluminum products (5083, 5086, 5754, 5454, 6061, etc.) are certified by multiple classification societies including LR, ABS, DNV, NK, and CCS.

Marine Aluminum Plate Price 2026

The price of marine-grade aluminum sheet typically consists of "base price of aluminum ingot + processing fee + ocean freight". Processing fees vary depending on the alloy grade, temper, dimensional tolerance requirements, and certification requirements. Generally, processing fees are lower for standard 5-series marine-grade sheet, higher for special tempers such as H116/H321, and additional fees apply to products requiring classification society inspection.

For a detailed product quote, please send us an email (sales@alummc.com) with your product's alloy grade, thickness, length, etc. Our sales manager will provide the best possible price.

Packaging & Shipping

Marine aluminum plates are packaged on wooden pallets with moisture-proof paper and plastic film to prevent oxidation during transport. Export packaging complies with seaworthy shipping standards.

FAQ

Q: What is the maximum size you can supply?
A: We operate ultra-wide and ultra-long rolling production lines.

Maximum width: 2650 mm

Maximum length: 16000 mm

Thickness range: 3.0 mm – 50 mm

Q: What tempers are commonly used for marine aluminum plates?
A: Common tempers include H111, H116, and H321, which provide excellent mechanical strength and seawater corrosion resistance.

Q: Can marine aluminum plates be welded?
A: Yes. 5000-series marine aluminum alloys have excellent weldability, making them ideal for ship hull structures and offshore equipment.

Q: What classification certifications are supported?
A: Materials can be supplied with certification from DNV (Norway), ABS (USA), LR (UK), BV (France), CCS (China), and RINA (Italy), including MTC and third-party inspection reports.