5754 Marine Grade Aluminum Alloy Aluminium Sheet

2026-02-24 14:09:49

5754 marine grade aluminum alloy sheet is a workhorse material for corrosive, saltwater, and high-humidity environments where durability, formability, and long-term appearance matter. As an Al–Mg alloy in the 5xxx series, 5754 is valued for its excellent corrosion resistance, good weldability, and stable mechanical performance without relying on heat treatment for strength. It is widely adopted in small craft hulls, superstructures, decking, ship interiors, and coastal infrastructure, and it is equally at home in transportation, tanks, and general fabrication.

Why 5754 Is Considered "Marine Grade"

"Marine grade" in aluminum typically refers to alloys that resist seawater corrosion and maintain integrity around welds and cut edges. 5754 meets this expectation because:

Magnesium-based alloying (Al–Mg) creates strong resistance to chloride-driven corrosion (pitting and crevice corrosion).
No heat-treatment dependence: Strength primarily comes from work hardening, making properties more predictable after fabrication.
Strong weld-zone behavior: It welds well with common marine filler wires (e.g., 5183/5356), supporting robust assemblies.

Features at a Glance

Feature	What it means in practice	Customer benefit
High corrosion resistance	Performs well in seawater splash zones and coastal atmospheres	Longer service life, lower maintenance
Excellent formability	Bends, rolls, and deep-draws readily (especially in O/H111)	Efficient fabrication, fewer cracks
Good weldability	MIG/TIG welding with marine fillers is straightforward	Faster assembly, reliable joints
Moderate strength	Stronger than 1xxx/3xxx series; not as strong as 5083	Balanced performance-to-cost
Attractive surface finish	Accepts brushing, coating, and anodizing (with considerations)	Better appearance, easier branding

Chemical Composition (Typical, wt.%)

5754's performance is largely defined by magnesium content and controlled impurity limits.

Element	Content (wt.%)
Mg	2.6 – 3.6
Mn	≤ 0.50
Cr	≤ 0.30
Si	≤ 0.40
Fe	≤ 0.40
Cu	≤ 0.10
Zn	≤ 0.20
Ti	≤ 0.15
Others (each)	≤ 0.05
Others (total)	≤ 0.15
Al	Balance

What this composition delivers:

Mg boosts strength and corrosion resistance.
Tight Cu limits help reduce susceptibility to certain corrosion mechanisms in marine exposure.

Mechanical Properties (Typical Values by Temper)

Properties vary by thickness, temper, and standard. Use these as practical guidance; confirm with mill test certificates (MTC).

Temper	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation A50 (%)	Notes
O (Annealed)	~190–220	~80–110	~18–25	Best for forming
H111	~200–240	~90–130	~16–22	Common "marine sheet" supply
H22	~240–270	~140–180	~10–16	Higher strength, moderate forming
H32	~250–280	~160–200	~10–14	Popular balance of strength/formability

Design note: For welded marine structures, allow for softening in the heat-affected zone (HAZ) typical of 5xxx series alloys. Good joint design and correct filler selection are to maintaining performance.

Physical & Performance Metrics (Typical)

Property	Typical value	Why it matters
Density	~2.66 g/cm³	Lightweight structures, higher payload
Elastic modulus	~70 GPa	Stiffness for panels and decks
Thermal conductivity	~130–150 W/m·K	Useful for heat dissipation in enclosures
Electrical conductivity	~30–35% IACS	Moderate conductivity applications
Melting range	~570–645°C	Welding and thermal process guidance

Technical Specifications (Common Supply Range)

Actual availability depends on mill capability and finish/flatness requirements.

Item	Typical range / options
Product form	Sheet / plate (thin-to-medium gauge)
Thickness	0.5 – 12.0 mm (common); thicker on request
Width	1000 / 1250 / 1500 mm (common); custom slitting available
Length	2000 / 2440 / 3000 / 6000 mm; cut-to-length
Tempers	O, H111, H22, H32 (others by agreement)
Surface finish	Mill finish, brushed, one-side PVC, both-side PVC
Standards (typical)	EN AW-5754 (EN 573/485), ASTM B209, GB/T equivalents
Flatness control	Standard / improved flatness for CNC, laser cutting
Certification	EN 10204 3.1 MTC, RoHS/REACH upon request

Corrosion Resistance and Marine Durability

5754 performs strongly in:

Seawater splash zones
Coastal industrial atmospheres
Condensation-prone compartments (bilges, lockers, equipment housings)

Practical corrosion guidance

Scenario	Recommendation
Direct contact with stainless steel	Use isolation (gaskets, sealants, coatings) to prevent galvanic corrosion
Immersed or high-chloride environments	Consider protective coatings or specify more aggressive marine alloys where needed
Painted systems	Use proper pretreatment (cleaning + conversion coating/primer) for adhesion and durability
Anodizing	Possible, but color uniformity can vary; agree on finish expectations early

Fabrication: Forming, Cutting, Welding

Forming

5754-O and 5754-H111 are excellent for bending and shaping. When specifying parts with tight bend radii, these tempers reduce cracking risk and improve edge quality.

Cutting and machining

Cuts well by shear, saw, waterjet, and laser (process tuning recommended).
For laser cutting, good flatness and consistent surface condition reduce dross and taper.

Welding

Process	Suitability	Notes
MIG (GMAW)	Excellent	Common for hulls and frames
TIG (GTAW)	Excellent	Clean, precise welds for thinner sheet
Resistance welding	Good	Used in some panel and assembly lines

Typical filler selection: 5356 or 5183 (final choice depends on strength requirements, service temperature, and joint design).

Where 5754 Aluminium Sheet Delivers the Most Value

Marine and offshore

Small boat hull sections (non-extreme duty)
Superstructures, bulkheads, partitions
Deck panels, hatch covers, lockers
Radar masts, seating bases, brackets

Transportation and vehicle bodies

Trailer side panels and floors
Truck bodies, ramps, steps
Lightweight enclosures and frames

Tanks and chemical handling (moderate duty)

Water tanks, utility tanks
Wash-down systems and housings in coastal plants

Architectural/coastal infrastructure

Facades, canopies, handrails (with proper isolation)
Equipment cabinets and coastal signage panels

Benefits for Customers (Performance-to-Cost)

Customer priority	How 5754 helps
Reduce maintenance	Natural corrosion resistance minimizes repainting and repairs
Speed up fabrication	Easy forming and reliable welding reduce shop time
Lower overall weight	High strength-to-weight improves efficiency and payload
Improve surface quality	Consistent sheet quality supports visible applications
Reliable sourcing	Widely produced alloy with broad temper/size availability

How to Specify 5754 Sheet Correctly (Buyer Checklist)

What to specify	Why it matters
Standard (EN/ASTM) and alloy designation	Ensures chemistry and tolerances are controlled
Temper (O, H111, H22, H32)	Governs strength vs. formability
Thickness + flatness requirement	Critical for CNC, laser, and panel fit-up
Surface finish + protective film	Reduces scratches; improves appearance yield
Certification (3.1 MTC)	Traceability for marine, transport, and regulated projects
Intended service environment	Helps choose coating, isolation, and filler wire

5754 marine grade aluminum alloy aluminium sheet is a practical, high-value choice for marine and coastal fabrication where corrosion resistance, weldability, and formability are essential. With flexible temper options (from highly formable O/H111 to stronger H22/H32), it supports everything from boat structures and deck components to vehicle panels and coastal equipment. Specify the right temper, confirm certification, and design intelligently around galvanic isolation-and 5754 will deliver a long-lasting, lightweight solution with excellent fabrication efficiency.

Lucy

5754 marine grade aluminum alloy sheet is a workhorse material for corrosive, saltwater, and high-humidity environments where durability, formability, and long-term appearance matter.

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