Marine & Shipbuilding Aluminum Solutions

DNV, Bureau Veritas, ABS and Lloyd's Register certified marine grade aluminum plate and sheet. Trusted by shipyards across Europe, the Middle East and Southeast Asia for hull plating, superstructures and offshore platforms.

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Key Alloys
5083 / 5086
+ 5052 for lighter applications
Thickness Range
6 - 200mm
Custom sizes available
Certifications
DNV / BV
ABS, Lloyd's Register
Experience
500+
Marine projects delivered
Material Advantages

Why Aluminum for Marine?

Aluminum alloys deliver a unique combination of properties that make them the material of choice for modern shipbuilding and offshore construction.

40% Lighter Than Steel

Aluminum weighs roughly 2.7 g/cm3 vs. 7.85 g/cm3 for steel, reducing displacement and fuel consumption by up to 20% on marine vessels.

Superior Corrosion Resistance

5xxx-series alloys form a natural oxide layer that protects against saltwater corrosion without painting, reducing lifetime maintenance costs significantly.

High Strength-to-Weight

Marine grade alloys like 5083-H116 achieve tensile strength above 305 MPa while remaining significantly lighter than equivalent steel structures.

Low Maintenance, Long Lifespan

No anti-corrosion coatings required in most marine environments. Aluminum hulls have proven service lives exceeding 30 years with minimal maintenance.

Marine Grade Products

Recommended Products

Our marine product range covers the most common alloys and tempers required by classification societies worldwide.

Primary Choice

5083-H116 Plate

The industry-standard marine alloy. Highest magnesium content in the 5xxx series delivers superior strength and exceptional resistance to saltwater and industrial chemical environments.

Temper H116 / H321
Thickness 6 - 200mm
Tensile Strength 305 - 385 MPa
Certifications DNV, BV, ABS, LR
View 5083 Plate
Alternative

5086-H116 Plate

A cost-effective alternative to 5083 with excellent weldability and corrosion resistance. Widely used for smaller vessels, yacht hulls and internal structures where slightly lower strength is acceptable.

Temper H116 / H32
Thickness 6 - 150mm
Tensile Strength 275 - 350 MPa
Certifications DNV, BV, ABS
View 5086 Plate
Lighter Applications

5052-H32 Sheet

Ideal for non-structural marine applications such as interior paneling, deck trim, and smaller boat components. Good formability and adequate saltwater resistance for above-waterline use.

Temper H32 / H34
Thickness 0.5 - 6.0mm
Tensile Strength 228 - 270 MPa
Best For Interior, trim, panels
View 5052 Sheet
Quality Assurance

Marine Certifications

Every marine plate we deliver comes with mill test certificates (MTC) and classification society approval. We maintain active approval with all major marine classification bodies.

DNV

DNV-GL

Det Norske Veritas Germanischer Lloyd -- the world's largest classification society for maritime. Our 5083 and 5086 plates are DNV-approved for hull structural applications.

BV

Bureau Veritas

French-headquartered classification society with global reach. BV certification confirms our marine aluminum meets Rules for the Classification of Steel Ships standards.

ABS

American Bureau of Shipping

The leading classification society for the American market. ABS approval is required for vessels operating under US Coast Guard jurisdiction and many offshore platforms.

LR

Lloyd's Register

One of the oldest and most respected maritime classification societies. LR approval certifies our plate meets the strictest UK and Commonwealth marine standards.

Proven Track Record

Case Study

500 Tons 5083-H116 for European Offshore Vessel

500T
Volume
3
Batch Deliveries
100%
UT Pass Rate
0
Rejection
Marine / Offshore
ClientEuropean offshore vessel builder (confidential)
Product5083-H116 plate, 8-60mm thickness, DNV certified
Timeline500 tons delivered in 3 batches over 6 months
Testing100% ultrasonic testing (UT), full mill test certificates (MTC)
ResultZero rejection. Client reordered for next vessel in their fleet.
Where It's Used

Application Areas

Marine grade aluminum is used across the entire spectrum of maritime construction, from small fishing boats to large offshore platforms.

Marine aluminum plate project material
Marine plate for shipbuilding projects
5083 aluminum plate stock
5083-H116 plate stock
Aluminum plate production workshop
Production capacity for marine orders

Hull Plating

The most critical marine application. Hull plates must withstand constant seawater immersion, wave impact and structural loads.

Alloy: 5083-H116 | Thickness: 8-50mm

Superstructure

Deckhouses, wheelhouses and superstructure panels where weight reduction directly improves vessel stability and fuel efficiency.

Alloy: 5083 / 5086 | Thickness: 4-25mm

Offshore Platforms

Helidecks, living quarters and topside modules for oil and gas platforms where weight savings are critical for structural integrity.

Alloy: 5083-H116 | Thickness: 10-80mm

Naval Vessels

Military patrol boats, corvettes and fast attack craft where the combination of light weight and ballistic protection is paramount.

Alloy: 5083-H116/H321 | Thickness: 6-60mm
Data Comparison

Technical Specs for Marine Grade

Side-by-side comparison of the three primary marine aluminum alloys. All values per ASTM B928 / EN 485-2 standards.

Property 5083-H116 5086-H116 5052-H32
Tensile Strength (MPa) 305 - 385 275 - 350 228 - 270
Yield Strength (MPa) 215 - 275 195 - 255 165 - 215
Elongation (%) 12 - 16 10 - 14 7 - 12
Density (g/cm3) 2.66 2.66 2.68
Corrosion Resistance Excellent (Seawater) Excellent (Seawater) Good (Above waterline)
Weldability Excellent (MIG/TIG) Excellent (MIG/TIG) Very Good (MIG/TIG)
DNV Grade NV-5083 NV-5086 N/A
Typical Thickness 6 - 200mm 6 - 150mm 0.5 - 6.0mm
Primary Use Hull, structural Hull, secondary Interior, trim
Common Questions

Marine Aluminum FAQ

Both H116 and H321 are stress-corrosion resistant tempers specified for marine use. H116 is strain-hardened and meets specific requirements for exfoliation corrosion resistance (ASTM G66, Grade PB or better). H321 is stabilized after strain hardening through thermal treatment. For most marine hull applications, H116 is preferred as it provides better intergranular and exfoliation corrosion resistance in high-magnesium alloys like 5083.
Yes. Every marine grade plate we deliver includes original mill test certificates (MTC) from the producing mill, certified by the requested classification society (DNV-GL, Bureau Veritas, ABS, or Lloyd's Register). The MTC includes chemical composition, mechanical properties, and any additional testing results (e.g., ultrasonic testing for plates above 12mm).
Our standard MOQ for marine grade plate is 5 tons per alloy/temper/thickness combination. For standard sizes of 5083-H116 (8mm, 10mm, 12mm, 16mm, 20mm), we maintain rolling stock and can offer smaller quantities from 1 ton. For non-standard dimensions or thicknesses above 50mm, mill production runs typically require 10-20 tons minimum.
Yes. We offer precision plasma and waterjet cutting services. If you provide your cutting plans (DXF/DWG files), we can nest and cut plates to your exact specifications before shipping. This reduces waste at the shipyard and speeds up fabrication. Cut-to-size service adds 5-7 working days to the standard lead time.
5083 is one of the best aluminum alloys for welding. When welded with 5183 or 5356 filler wire using MIG or TIG methods, the weld joint retains approximately 90% of the base metal's strength (275+ MPa tensile). The heat-affected zone (HAZ) reverts to an annealed (O) temper condition but still provides adequate strength for marine structural applications. We recommend post-weld inspection per classification society requirements.

Discuss Your Marine Project

Tell us about your vessel type, required alloy, thickness and certification needs. Our marine specialists will provide a detailed quotation within 24 hours including MTC, testing scope and delivery schedule.

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