Good Weldability Al-Mg Alloy 5086 Aluminum Alloy Plate For Marine

5086 is the preferred hull material for small aluminium boats or larger yachts. Its high

strength and good corrosion resistance make it an excellent match for yachting. 5086

has a tendency to undergo Stress corrosion cracking and is not used much in aircraft

construction as a result.

Key Properties of 5086 Aluminum Alloy

♦ Moderate-to-High Strength

Tensile Strength: 240–300 MPa (depends on temper)

Yield Strength: 110–240 MPa (O temper to H116/H321)

Good fatigue resistance for marine dynamic loads.

♦ Excellent Corrosion Resistance

Resists seawater, salt spray, and marine atmospheres (Mg content: 3.5–4.5%).

Better than 5xxx alloys with lower Mg (e.g., 5052).

♦ Good Weldability

Compatible with MIG, TIG, and FSW (Friction Stir Welding).

Minimal strength loss in welded joints.

Marine Applications of 5086 Aluminum Plate

5086 is widely used in shipbuilding and offshore structures, including:

1. Hull Construction

• Small-to-medium boats (thickness: 3–8 mm).

• Superstructures (thickness: 2–6 mm).

• Decking & bulkheads (thickness: 4–10 mm).

2. Offshore & Marine Equipment

• Floating docks, gangways, and pontoons (thickness: 5–12 mm).

• Fishing vessels & workboats (where cost-efficiency is key).

3. Pressure Vessels & Fuel Tanks

• Lighter than steel, corrosion-resistant (thickness: 6–15 mm).

Comparison with 5083 Aluminum

Why Choose 5086 for Marine Use?

✔ Balanced cost-performance ratio (cheaper than 5083 but still strong).

✔ Easier to fabricate (better for complex shapes).

✔ Still highly corrosion-resistant (suits most marine environments).

✔ Widely available in marine-grade tempers (H116/H321).

Conclusion

5086 is a cost-effective alternative to 5083 for marine applications where extreme strength

isn’t required. It’s widely used in hulls, decks, and offshore structures, typically in 3–12 mm

thicknesses. For harsher conditions (e.g., LNG carriers, military ships), 5083 remains the

premium choice.

Qingdao Jero steel company is a professional raw material integrated supplier, located in the beautiful costal city, Qingdao,

mainly product is steel material and Aluminum alloy sheet/coil.

We own a very comfortable work environment, and humanized management system, we hope that a job can not only bring

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A stable customer can bring us good reputation and constantly economic benefit. For the past years, relying on a perfect quality

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