5083 Aluminum Square Tubes

The 5083 aluminum square tube is a tubular profile with a square cross-section made from 5083 aluminum alloy, an important member of the Al-Mg anti-rust aluminum alloy family.

5083 aluminum square tube is an extruded structural profile made from AA5083. AA5083 is a non-heat-treatable aluminum-magnesium alloy known for its outstanding corrosion resistance, high strength, and excellent weldability. Its square cross-section provides uniform load-bearing capacity in multiple directions, making it ideal for demanding applications in marine, transportation, and industrial sectors.

The composition of the 5083 alloy includes approximately 4–4.9% magnesium, 0.4–1% manganese, and trace amounts of chromium, giving it both toughness and formability, with better performance in corrosive environments than many other 5000-series alloys. The square tube form retains these inherent material properties while offering geometric advantages of hollow profiles, such as lighter weight and lower cost compared to solid bars.

Haomei Aluminum specializes in the production of 5083 aluminum square tubes, using high-magnesium alloy materials with excellent seawater corrosion resistance and weldability. Widely used in shipbuilding, pressure vessels, rail transit, and other fields. Products support customization of outer diameter (10–2500mm), wall thickness (0.4–100mm), and length (5–2000mm), and offer diverse surface treatments such as anodizing, brushing, and polishing. Certified by ISO, SGS, BV, and other international standards to ensure stable and reliable mechanical properties. OEM processing (cutting, bending, welding) supported, with fast delivery in 7–15 days and direct global port logistics. Ample stock available with free sample testing to meet your engineering and industrial needs.

5083 Aluminum Square Tubes Processing Properties

• Weldability: Excellent arc welding performance, suitable for complex structural welding
• Formability: Good cold working properties, can be formed through extrusion and deep drawing processes
• Surface Treatment: Aesthetic appearance after anodizing, excellent polishing effect

5083 Aluminum Square Tubes Standards and Specifications

• EN 755-2 / EN ISO 6361: European standards covering mechanical and chemical requirements for extruded and cold-processed products
• ASTM B221: Specification for aluminum and aluminum alloy extruded bars, rods, wires, profiles, and tubes
• ISO 6362-2: International standard for extruded aluminum profiles ensuring dimensional tolerance and quality control

5083 Aluminum Square Tubes Key Advantages

• Corrosion Resistance: Outstanding performance in marine atmospheres and industrial environments, especially suitable for seawater conditions
• Lightweight Characteristics: Density of approximately 2.7g/cm³, about 65% lighter than steel, suitable for weight-sensitive applications

Haomei 5083 Aluminum Square Tube Stock

5083 Aluminum Square Tubes Alloying Elements

• Magnesium (Mg): 4.0–4.9%, provides primary strengthening through solid solution strengthening
• Manganese (Mn): ≤ 1.0%, improves toughness and controls grain structure
• Chromium (Cr): ≤ 0.25%, enhances corrosion resistance and inhibits grain growth during welding
• Other elements (Silicon, Iron, Zinc, Titanium): each ≤ 0.4%, balance strength, formability, and corrosion resistance

5083 Aluminum Square Tubes Classification

• Grade: AA5083 (UNS A95083, ISO AlMg4.5Mn)
• Tempers: Commonly O, H111, H116, H321, and H131; H321 (strain hardened and stabilized) is often used for extruded tubes to optimize ductility and strength

5083 Aluminum Square Tubes Physical Properties

• Density: 2.65 g/cm³, enables lightweight yet strong structures
• Melting Range: Approx. 570 °C, suitable for hot working and welding operations
• Elastic Modulus: ~72 GPa, provides good rigidity for structural applications

5083 Aluminum Square Tubes Mechanical Properties (Typical values in H111 temper)

• Ultimate Tensile Strength (Rm): 275–317 MPa
• Yield Strength (Rp0.2): ≥ 228 MPa
• Elongation: ≥ 10–12% over 50 mm gauge length, balancing strength and formability
• Hardness (HBW): Up to 70, indicating moderate work hardening capacity

5083 Aluminum Square Tubes Manufacturing and Welding

• Extrusion: Square tubes are produced via direct or indirect extrusion processes at temperatures above recrystallization, then cooled and straightened to strict tolerances.
• Weldability: Suitable for MIG, TIG, and resistance welding; post-weld strength retention exceeds 90%, with no hot cracking
• Machinability: Moderate to poor; best practices include using sharp tools and ample coolant to prevent work hardening and surface wear

5083 Aluminum Square Tubes Surface Treatment and Finishing

• Anodizing: Anodizing can enhance corrosion resistance and appearance; thickness and color uniformity depend on alloy impurities
• Painting and Coating: Typically powder coating or painting is used to provide additional protection in harsh industrial or marine environments; surface pretreatments (e.g., chromate conversion) enhance adhesion

Typical Applications of 5083 Aluminum Square Tubes

• Marine Structures: Hulls, decks, and superstructures; square tubes are used as framing components, supports, and struts due to their excellent seawater resistance.
• Pressure Vessels and Cryogenic Engineering: Frames and supports in cryogenic tanks and industrial rigs, maintaining high strength at sub-zero temperatures.
• Transportation: Bodies of rail vehicles, truck frames, and trailer understructures; the tubular geometry reduces weight and improves fuel efficiency.
• Construction and Decoration: Structural frames for exterior walls, pavilions, and canopies; anodizing or painting ensures both durability and aesthetics.

5083 Aluminum Square Tubes Manufacturing Process

Extrusion Forming

Hot extrusion is used to process aluminum billets into square tube blanks, with a typical annealing temperature of 415°C.

Cold Work Hardening

Cold drawing processes are applied to control dimensional accuracy and enhance surface finish.

Finishing Treatments

Includes straightening, cutting (standard fixed length of 2500 mm), and surface passivation processes.

5083 aluminum square tubes combine the material advantages of AA5083 alloy with the structural benefits of hollow square profiles, making them a versatile solution for corrosive, marine, and high-strength applications. The balance of strength, weldability, and corrosion resistance ensures long-term performance in industrial and architectural fields.

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