Marine aluminum alloy stiffened FSW (Friction Stir Welding) panel is a high-performance structural material specifically designed for marine environments. It achieves efficient joining of stiffened aluminum alloy plates through friction stir welding technology, offering advantages such as lightweight, high strength, corrosion resistance, and minimal weld deformation. It is widely used in various marine ships, vessels and engineering equipment.

1. Core Technology: Friction Stir Welding (FSW)

FSW is a solid-state welding technology that uses friction between a rotating tool and the workpiece to generate heat, causing localized softening and plastic flow of the material, thus achieving a joint. Its core advantages include:

- No melting process: Avoids fusion welding defects (such as porosity and cracks), resulting in a dense joint structure and excellent mechanical properties.

- Low heat input: Minimal weld deformation, especially suitable for long, straight weld seams (such as stiffened profiles).

- Green and environmentally friendly: No welding wire or shielding gas required, no smoke or radiation, safe operation.

- High efficiency and automation: Simple equipment, low energy consumption, suitable for large-scale production.

Applications in stiffened FSW panels:

Stiffened FSW panels are manufactured through extrusion processes and contain parallel reinforcing ribs (such as double-ball heads and square tubes), significantly improving structural rigidity and stability. FSW technology enables highly reliable welding of ribbed plates to side plates, meeting the stringent requirements of marine environments for structural strength and durability.

2. Material Properties

- Lightweight and high strength

Aluminum alloys have only 1/3 the density of steel, but a high specific strength, which can significantly reduce hull weight and improve speed and fuel efficiency. Commonly used grades such as 6082-T6 and 5083-H112 have tensile strengths exceeding 300 MPa, meeting the structural requirements of ships.

- Corrosion resistance

Aluminum alloys form a dense oxide film (passivation film) on their surface, effectively resisting seawater corrosion. 5083 aluminum alloy, containing magnesium, has even better corrosion resistance and is widely used in cryogenic environments such as LNG tanks.

- Processing performance

Aluminum alloys can be extruded into complex cross-section profiles (such as ribbed plates), and the welded joints exhibit stable performance, making them suitable for modular manufacturing of marine equipment.

3. Typical Application Scenarios

These aluminum stiffened FSW plates are widely used in shipbuilding, marine engineering, floating platforms, offshore wind power and other fields.

- Military vessels

Frigides and Destroyers: Used for upper decks, side plating, bulkheads, etc., reducing weight while ensuring impact resistance.

Missile Boats: For high-speed navigation, aluminum stiffened FSW plates achieve a balance between lightweight and high rigidity.

- Civilian Vessels

LNG Carriers: 5083 aluminum alloy stiffened plates are used in cargo tank structures; FSW technology ensures welding reliability in low-temperature environments.

Fisheries and Marine Surveillance Vessels: For corrosion resistance and long service life requirements, aluminum alloy stiffened plates are the preferred material.

Luxury Yachts: Combining lightweight and aesthetics, improving navigation performance and user experience.

- Marine Engineering Equipment

Offshore Platforms: Used for supporting structures, decks, etc., resisting wind and wave loads.

Submersible Hulls: High-strength aluminum alloy stiffened plates combined with FSW technology ensure structural safety in deep-sea environments.

Haomei Aluminum is equipped with a large-scale production line for stiffened profiles, featuring double-action extrusion cylinders, atmosphere heating furnaces, and an online water quenching heat treatment system. Production cycles have been reduced from 45-60 days to 7-15 days. Single profiles are 600mm wide and 16.2m long (expandable to 32m), allowing for unlimited width splicing. The stiffened profile direction is parallel to the ship's length, reducing the number of welds and improving structural efficiency. Weld penetration control and stress deformation control ensure no deformation in large-scale, thin-walled stiffened profiles. We have 36 sets of stiffened profile molds to support rapid development and meet customized customer needs. We strictly adhere to the quality systems of classification societies CCS, DNV, BV, LR, and RINA, with 100% inspection of welds in every batch. You can purchase with confidence.