Marine Aluminum Alloy Sheets & Profiles

Lightweight, Corrosion-Resistant Solutions for Shipbuilding & Offshore Structures

Product Overview:

Our marine-grade aluminum alloy sheets and profiles are specifically engineered for shipbuilding, offshore platforms, and maritime structures. Utilizing 5xxx series (Al-Mg) and 6xxx series (Al-Mg-Si) alloys, these products offer exceptional corrosion resistance in seawater environments, high strength-to-weight ratio, and excellent weldability. Compared to steel, aluminum reduces vessel weight by 40–50%, leading to improved fuel efficiency, higher payload capacity, and better stability.

Key Features Common to Both Sheets & Profiles:

Excellent resistance to seawater and marine atmosphere corrosion

High strength at sub-zero temperatures (ideal for Arctic/Antarctic vessels)

Non-magnetic and spark-free (safe for naval and hazardous cargo vessels)

Good weldability (MIG/TIG) and formability

Low maintenance with no painting required (natural oxide layer)

Fully recyclable (no loss of properties)

Material Specifications by Series:

5083 Alloy (Al-Mg) – The Industry Standard

Highest strength among non-heat-treatable marine alloys

Excellent seawater corrosion resistance including stress corrosion cracking resistance

Outstanding weldability (weld strength efficiency >90%)

Typical tensile strength: 290–350 MPa (depending on temper)

Applications: Ship hulls, superstructures, fuel tanks, deckhouses, helicopter landing pads

5086 Alloy (Al-Mg) – Formability Optimized

Slightly lower strength than 5083 but superior formability and lower cost

Excellent corrosion resistance comparable to 5083

Easier to bend, roll, and form into complex shapes

Applications: Small boat hulls, pontoons, fuel tanks, ductwork, interior components

5754 Alloy (Al-Mg) – General Marine Fabrication

Moderate strength with excellent surface finish and formability

Good corrosion resistance for sheltered seawater exposure

Applications: Superficial structures, railings, ladders, gangways, tender boats

6061 & 6063 Alloys (Al-Mg-Si) – Heat-Treatable Profiles

Medium to high strength after heat treatment (T6 temper)

Excellent extrusion characteristics for complex profile shapes

Good corrosion resistance with proper surface treatment (anodizing or painting)

Applications: Masts, booms, railings, window frames, deck rails, gangways, structural extrusions

Marine Aluminum Sheets

Product Range:

Thickness: 1.0 mm to 50.0 mm

Width: Up to 2600 mm

Length: Up to 12000 mm or custom

Available Tempers:

O (Annealed) – Maximum formability for deep drawing

H111 / H112 – As-fabricated, slight strain hardening, general marine fabrication

H116 / H321 – Special marine tempers with controlled intergranular corrosion resistance (recommended for hulls in direct seawater contact)

H32 / H34 – Strain hardened and stabilized for moderate strength requirements

Surface Finishes:

Mill finish (standard)

Stucco / tread plate (anti-slip flooring and decking)

Chemically etched or alodined (pre-treatment for painting)

Key Applications for Sheets:

Ship hulls and side shells

Decks and deckhouses

Bulkheads and partitions

Fuel and water tanks

Anti-slip flooring (tread plate)

LNG tank containment systems (5083 at cryogenic temperatures)

Marine Aluminum Profiles

Product Range:

Standard profiles: Equal and unequal angles, channels (U/C), I-beams, flat bars, round/square bars, T-profiles

Custom extrusions: Complex hollow and solid shapes produced to customer drawings (tolerances per EN 755 or ASTM B221)

Maximum extrusion width: Up to 450 mm (depending on profile geometry)

Typical lengths: 4,000 mm, 6,000 mm, or custom cut

Available Temper for Profiles:

T5 (Thermally aged after extrusion)

T6 (Solution heat treated and artificially aged)

T52 or T53 (Specific marine-grade tempers for improved corrosion resistance)