Marine Grade Aluminum
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Tianjin/Qingdao, China

Product Brief

The corrosive nature of water and saltwater dictates the use of special materials for shipbuilding, off-shore drilling platforms, and more. Due to its many beneficial properties, marine-grade aluminum is eminently suitable for building seafaring vessels and structures, as well as the machinery and components used within them.

What is Marine-Grade Aluminum?
Even though pure aluminum has a high natural resistance to corrosion compared to many other metals, the constant exposure to water and moisture in marine applications warrants additional protection. When alloyed with other metals like magnesium, aluminum develops an even higher level of corrosion resistance that can tolerate constant contact with water and saltwater. These specially treated aluminum alloys are known as marine-grade aluminum.

Mingtai several grades of marine grade aluminum in a variety of stock forms, including plate, sheet, coil, bars, checked. We can also provide them with varying degrees of temper. The grades we can provide include: 

5083. 5083 marine-grade aluminum is ideal for applications that need superlative corrosion resistance in hostile environments. 5083 is the strongest non-heat treatable aluminum alloy and maintains its strength even after welding.
5086. This alloy is highly conductive with superior corrosion resistance. 5086 can be strengthened through strain hardening and cold working until it is even stronger than in 5083. Though compatible with multiple welding methods, electric arc welding is preferred for this alloy.
5454. The beneficial properties of 5454 include high strength, superior corrosion resistance, and good formability and weldability. 
5456. Widely used for structural applications, 5456 is well-suited to the extrusion process. It is also amenable to forming operations like rolling and forging. 5456 can be made stronger through cold working, but the process reduces its ductility.
5754. Its superior resistance to corrosion makes 5754 very suitable for the marine industry and other industrial applications possessing corrosive operating environments. It is also suitable for flooring applications due to its high strength.

Aluminum Products for Marine Applications

Marine aluminum is used to make a wide variety of marine products. Two of these include honeycomb panels and metal powder. 
Honeycomb panels are composite products inspired by the structure of honeycombs in bee colonies. A honeycomb panel consists of a core layer of hexagonal honeycomb fabricated with aluminum. The core is sandwiched between two aluminum plates glued to either side. This structure can be fabricated with various thicknesses. 

Honeycomb panels have the following beneficial properties:
>Low weight
>High rigidity, strength, and vibration damping
>High resistance to impacts
>Good insulation from heat and sound
>Good pliability

Since the honeycomb panel requires a smaller quantity of aluminum than a solid sheet of comparable mechanical properties and thickness, it is more cost-effective than aluminum panels. It’s lighter weight also saves on shipping costs for bulk orders. Like all aluminum, honeycomb panels can be infinitely recycled.

Aluminum metal powders are used in a variety of industries, including the marine industry. These fine particles of aluminum are used in many manufacturing techniques, such as aluminum injection molding, surface coating, and additive manufacturing.

The Benefits of Using Aluminum in Marine Applications

Marine-grade aluminum is specifically developed to make it ideal for use in marine environments. As such, it possesses a number of properties required in these applications. Some of these properties include:
>Superior corrosion resistance
>Lightweight with a high strength-to-weight ratio
>Compatibility with a variety of fabrication processes
>Wide availability in sheets, extrusions, and plates

Properties of Aluminum for Marine Applications

There are many grades of marine aluminum, each differing slightly in its properties due to the alloy materials that are included.


Advantages of  Mingtai Marine Grade Aluminum Plate

1. Advanced production equipment, strong processing capacity, - made Mingtai marine aluminum plate of excellent quality.

2. Strong processing capacity - Mingtai Al. marine aluminum with an annual output of 200,000 tons to help customers seize the market.

3 . Authoritative international certification - for the Mingtai Al. quality board to ensure quality

4. Low density, high strength, reduce the ship weight
The low density, high strength, high rigidity and corrosion resistance of aluminum make the aluminum ship 20% lighter in weight compared to ships made of steel or other alloy materials. This can reduce ship weight and reduce energy

5. Corrosion resistance, durable, economic and environmental protection
Mingtai marine aluminum alloy of high toughness, corrosion resistance and weldability, for the strict production of the ship may be possible. At the same time, the Mingtai board can be more resistant to the ocean climate in the atmosphere, steam, water and other media corrosion, durable, more economical.

Technical Parameter

Properties of Marine Aluminum Alloy 


Aluminium Allo


Chemical composition




Used for  Ship body



 Al:remainder  Si:≤0.25
Cu:≤0.10 Mg:2.2~2.8
Zn:≤0.10  Mn:≤0.10
Cr:0.15~0.35 Fe:≤0.40

 moderate strength, with good corrosion resistance and formability

 upper structure, subsidiary component, boat body



 Al:remainder  Si:≤0.40
Cu:≤0.10  Mg:4.0~4.9
Zn:≤0.25 Mn:0.40~1.0 Ti:≤0.15 Cr:0.05~0.25Fe:0~0.400

 typical welding aluminium alloy, with the highest strength in nonheat treated alloy, with good weldability, good corrosion resistance and good low temperature performance

 main structure of ship body



Al:remainder   Si:≤0.40
Cu:≤0.10 Mg:3.5~4.5
Zn:≤0.25 Mn:0.20~0.7 Ti:≤0.15  Cr:0.05~0.25; Fe:0~0.500

。With good weldability and corrosion resistance as alloy 5083, lower strength than 5083, with better extrusion

main structure of ship body



Al:remainder   Si:≤0.25
Cu:≤0.10 Mg:2.4~3.0
Zn:≤0.25 Mn:0.50~1.0
Ti:≤0.20  Cr:0.05~0.20

Tensile strength is 22% higher than 5052, with good corrosion resistance and good weldability, but common formability

 ship structure, pressure vessel, pipeline etc.



Cu :0.15~0.4  Mn :0.15
Mg :0.8~1.2  Zn :0.25
Cr :0.04~0.35 Ti :0.15
Si :0.4~0.8   Fe :0.7   Al :remainder

Heat treating corrosion resistant alloy, with high tensile strength but low welded joint strength, mainly used for screw joint and riveted structure which no contacting with seawater

 Upper structure, clapboard structure, frame etc.

Used for outfitting





H112  O

 Al:remainder   Si:≤0.25
Fe:0.40    Cu:≤0.50
Mn:≤0.50  Mg:≤0.50
Zn:≤0.15  Ti:≤0.03

with low tensile strength, good processability, good weldability, good corrosion resistance, high surface processability

interior finish

 Cu:≤0.50  Mn:≤0.50
Zn:≤0.15  Ti:≤0.03



H112  O

 Al:remainder   Si:≤0.60
Fe:≤0.70   Cu:≤0.50
Mn:1.0~1.5  Zn:≤0.10

Tensile strength is 10% higher than 1100, good formability, good weldability, good corrosion resistance

interior finish, top plate and side plate of LPG tanks

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