What-is-5083-Aluminum-Flat-Bar.pdf
5083 aluminum flat bar is a robust, non-heat-treatable alloy that stands out for its exceptional corrosion resistance, particularly in marine and industrial settings. Its composition includes 4.0–4.9% magnesium, 0.15% chromium, up to 0.7% manganese, and minimal trace elements. These alloying elements contribute to its high seawater resistance and strength retention even after welding.
Available in tempers like H111, H116, and H321, 5083 aluminum flat bar offers good ductility, making it ideal for demanding structural applications in industries such as shipbuilding, automotive, aerospace, and more.
5083 Aluminum Flat Bar Chemical Composition:
Magnesium (Mg): 4.0 – 4.9%
Chromium (Cr): 0.05–0.25%
Manganese (Mn): 0.4–1.0%
Silicon (Si), Iron (Fe), Copper (Cu), Zinc (Zn), Titanium (Ti): ≤ 0.4% each
Aluminum (Al): Balance
Mechanical Properties:
Ultimate Tensile Strength (H321): ~300 MPa (43 ksi)
Yield Strength: ~215 MPa (31 ksi)
Brinell Hardness (H116/H321): 83-85 HB
Density: 2.66 g/cm³
Thermal Conductivity: 816 BTU·in/hr·ft²·°F
Electrical Conductivity: ~29 % IACS
Melting Point: 1,080 – 1,180°F
Key Features:
Corrosion Resistance: Outstanding, especially in seawater environments.
Strength: High tensile strength, ideal for cryogenic applications.
Weldability: Good, maintaining strength after welding.
Non-Heat-Treatable: Strengthened by strain hardening.
Dimensions and Specifications:
Thickness: 3 mm – 150 mm
Width: 10 mm – 600 mm
Shape: Rectangular cross-section
Tempers Available: H111, H116, H321
Standards: ASTM B209/ASME SB209, EN AW-5083, ISO 6361
Surface Finishes: Mill finish, anodized, or powder-coated
Applications:
Marine and Shipbuilding: Hull plating, decks, superstructures, and underwater fittings.
Transportation: Truck trailers, rail vehicles, and aircraft components.
Construction: Bridges, pressure vessels, and chemical storage tanks.
Cryogenics: LNG storage, low-temperature components.
Advantages:
Excellent corrosion resistance and weldability.
High strength and good formability.
Performs well under cryogenic conditions and in marine environments.
Limitations:
Not heat-treatable; avoid temperatures above 65°C (150°F).
Moderate machinability, requiring sharp tools and lubricants.
Manufacturing and Welding Considerations:
Machining: Requires sharp tools and lubricants due to work hardening.
Forming: Moderate hardness in high-temperature tempers.
Welding: Retains high strength post-welding, particularly in MIG, TIG, and resistance welding.
Comparison with Other Alloys:
VS 6061: 5083 offers better corrosion resistance and weldability but has lower machinability.
VS 5052: 5083 provides higher strength and better performance in harsh environments.
