Aluminum 5083

Aluminum 5083 is a high-strength, non-heat-treatable aluminum-magnesium alloy known for its excellent corrosion resistance, weldability, and structural performance. It performs particularly well in seawater and humid environments, making it a popular material for marine, offshore, and large welded structures.

Appearance & Properties

Color: Silver-white to silver-gray

Density: Approx. 2.66 g/cm³

Tensile Strength: Approx. 275–350 MPa (depending on temper)

Corrosion Resistance: Excellent

Machinability: Moderate

Weldability: Excellent

Formability: Good

Surface Finishes: Anodizing, bead blasting, brushing, polishing, painting, etc.

Typical Applications

Aluminum 5083 is widely used in marine, offshore engineering, transportation, automotive, industrial equipment, and pressure vessels.

Typical parts include hull structures, deck components, marine equipment brackets, vehicle structures, storage tanks, pressure vessel components, large mounting plates, and corrosion-resistant CNC parts.

Advantages

• Excellent seawater and corrosion resistance

• High strength among non-heat-treatable aluminum alloys

• Excellent weldability

• Good strength-to-weight ratio

• Well suited for marine and harsh environments

Limitations

• Lower CNC machinability than 6061 and 7075

• Cannot be significantly strengthened by heat treatment

• High-speed machining requires attention to chip control and material adhesion

• Not recommended for prolonged high-temperature service