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Aluminium 5083 vs 5086 – What’s the Difference

Aluminium 5083 vs 5086

Aluminium is a popular metal used for various products, from aerospace and marine industries to construction and transportation. It’s lightweight, durable, and corrosion-resistant, making it ideal for demanding environments where strength and reliability are essential. In this blog post, we will compare two popular types of aluminium alloys – 5083 and 5086 – and help you decide which is the best for your application.

Difference Between Aluminium 5083 and 5086

Composition and Properties

Both 5083 and 5086 are marine-grade aluminium alloys that contain magnesium, manganese, and chromium. However, 5083 has a higher magnesium content than 5086, which makes it more corrosion-resistant in saltwater environments. In contrast, 5086 has a slightly higher strength and a lower density, making it more suitable for structural applications.

5083 has a specific ultimate tensile strength of 570 MPa and a yield strength of 270 MPa, whereas 5086 has a strength of 550 MPa and a yield strength of 240 MPa. Both alloys have excellent weldability and formability, but 5083 is more prone to cracking during welding. On the other hand, 5086 is more machinable and easier to bend without cracking.


5083 and 5086 are commonly used in the marine industry for boat hulls, decks, and other components exposed to saltwater and harsh weather conditions. However, due to its superior corrosion resistance, 5083 is preferred for underwater applications, such as propellers and rudders. 5086 is suitable for above-water applications, such as superstructures and railings, due to its strength and lightweight.

Both alloys are also used in the aerospace industry for aircraft fuel tanks, hydraulic tubing, and other structural components that require high strength and durability. In the construction industry, they can be used for building facades, roofing, and cladding, where corrosion resistance and aesthetics are important.


The cost of aluminium varies depending on the market conditions, the alloy composition, and the manufacturing processes. Generally, 5083 is more expensive than 5086 due to its higher magnesium content and superior corrosion resistance. However, the price difference may be insignificant for small-scale projects, and the choice of alloy should primarily be based on the performance and suitability for the intended application.


Aluminium is known for its low maintenance requirements but must be protected from corrosion and wear. Depending on the aesthetics and durability requirements, 5083 and 5086 can be protected with various coatings, such as anodizing, powder coating, or paint. Regular cleaning and inspection are also necessary to detect any signs of corrosion or damage and prevent further deterioration.


In conclusion, choosing between aluminium 5083 and 5086 depends on various factors, such as the application, the environment, the strength requirements, and the budget. While 5083 is better suited for underwater applications and has superior corrosion resistance, 5086 is stronger, lighter, and more machinable. Both alloys have excellent weldability and formability and are commonly used in the marine, aerospace, and construction industries. As with any material, proper maintenance and protection are essential to ensure their long-term performance and reliability.

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