5086-H116 Aluminum: The Superior Choice for Marine Welding Applications

When it comes to welding marine components like fuel tanks for boats, choosing the right aluminum alloy is crucial. While 5052-H32 has been a popular choice for many years, 5086-H116 aluminum offers several advantages that make it the superior option for marine welding applications.

Strength and Durability

5086-H116 aluminum boasts higher strength properties compared to 5052-H32, making it more suitable for demanding marine environments[1][3]. The ultimate tensile strength of 5086-H116 is approximately 40-44 ksi, whereas 5052-H32 typically ranges from 33-38 ksi[2][6]. This increased strength translates to better durability and longevity for welded components like fuel tanks, which are subject to constant stress and vibration in marine settings.

Corrosion Resistance

Both 5086-H116 and 5052-H32 offer excellent corrosion resistance, which is essential for marine applications. However, 5086-H116 has a slight edge in this department, particularly when it comes to seawater corrosion resistance[3][5]. This makes it an ideal choice for components that are frequently exposed to saltwater, such as fuel tanks and other boat structures.

Weldability

One of the most significant advantages of 5086-H116 over 5052-H32 is its superior weldability[3][4]. 5086-H116 retains most of its mechanical strength after welding, which is crucial for maintaining the integrity of fuel tanks and other welded structures. This characteristic allows for stronger, more reliable welds that can better withstand the harsh conditions of marine environments.

Formability

While both alloys offer good formability, 5086-H116 is generally more formable than 5052-H32[3][4]. This property is particularly beneficial when fabricating complex shapes or curves often found in boat fuel tanks and other marine components. The improved formability of 5086-H116 allows for easier shaping and bending without compromising the material's strength or integrity.

Marine Industry Preference

The marine industry has increasingly favored 5086-H116 for applications that require higher strength and excellent welding characteristics[3][5]. Its popularity in shipbuilding, particularly for boat hulls and superstructures, is a testament to its superior performance in marine environments.

Conclusion

While 5052-H32 remains a solid choice for many applications, 5086-H116 aluminum clearly outperforms it when it comes to welding marine components like fuel tanks for boats. Its higher strength, superior corrosion resistance, excellent weldability, and better formability make it the ideal alloy for marine welding applications. By choosing 5086-H116, boat manufacturers and marine engineers can ensure stronger, more durable, and longer-lasting welded structures that can withstand the challenges of marine environments.