5086 Aluminum Round Bar
5086 aluminum round bars are circular bars made from aluminum-magnesium alloy (5xxx series), which belongs to non-heat treatable strengthened aluminum alloys. The strength is enhanced through cold processing (such as cold rolling, cold drawing).
5086 aluminum alloy is a high-magnesium alloy in the 5000 series, renowned for its outstanding corrosion resistance, particularly in marine environments. It is non-heat treatable and is strengthened through strain hardening (cold working), making it an ideal choice for welded structures in harsh conditions.
5086 aluminum is a high-strength marine-grade alloy primarily composed of aluminum and magnesium, with excellent performance, making it suitable for demanding applications, especially in marine and industrial environments.
5086 aluminum round bars, with their lightweight, corrosion resistance, and welding advantages, are key materials for marine ships, engineering equipment, and high-speed vessels. When selecting, it is essential to assess based on specific strength requirements (e.g., H116 condition) and environmental conditions (shallow or deep sea) and prioritize products from suppliers with corrosion certification.
5086 Aluminum Round Bar Characteristics
Exceptional Corrosion Resistance
- Particularly suitable for high-salinity, humid environments such as marine and chemical industries, with excellent seawater corrosion resistance.
- A natural oxide film forms on the surface, further enhancing corrosion resistance.
Moderate Strength, High Toughness
- Tensile Strength: approximately 260–320 MPa (depending on temper).
- Good plasticity, easily cold-processed into shapes (such as bending, stamping).
Excellent Weldability
Commonly welded using TIG/MIG methods, requiring no heat treatment after welding. Welds have high strength and corrosion resistance.
Stable Low-Temperature Performance
Retains good toughness at low temperatures (e.g., -196°C), making it suitable for liquefied natural gas (LNG) equipment.
5086 Aluminum Round Bar Chemical Composition
The main components of 5086 aluminum alloy are:
- Magnesium (Mg): 3.5%–4.5%
- Manganese (Mn): 0.2%–0.7%
- Chromium (Cr): ≤0.25%
- Iron (Fe): ≤0.5%
- Silicon (Si): ≤0.4%
- Copper (Cu): ≤0.1%
- Titanium (Ti): ≤0.15%
- Zinc (Zn): ≤0.25%
- Aluminum (Al): Balance
This composition provides the alloy with excellent strength and corrosion resistance.
5086 Aluminum Round Bar Mechanical Properties
The mechanical properties of 5086 aluminum vary depending on the temper:
| Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
| O (Annealed) | 260–290 | 115–130 | 16–22 |
| H111 | 270–300 | 125–140 | 12–16 |
| H116/H117 | 290–320 | 215–240 | 10–12 |
These properties indicate that 5086 aluminum strikes a balance between strength and ductility, making it suitable for demanding applications.
Key Features:
- Excellent fatigue resistance.
- Retains performance at low temperatures.
5086 Aluminum Round Bar Physical Properties
- Density: 2.66 g/cm³
- Melting Range: 570–640°C (1, 058–1, 184°F)
- Electrical Conductivity: ~30% IACS (lower due to Mg content)
- Thermal Conductivity: ~125 W/m·K
5086 Aluminum Round Bar Common Tempers
- O (Annealed): Soft temper, easy to shape, lowest strength.
- H111/H116: Light cold working, balancing strength and formability.
- H32/H34: Medium cold working, higher strength, suitable for structural components.
5086 Aluminum Round Bar Corrosion Resistance
5086 aluminum exhibits outstanding corrosion resistance, especially in marine environments. This makes it the material of choice for applications exposed to seawater or other corrosive environments. It is highly resistant to pitting, stress corrosion cracking, and exfoliation, making it commonly used in hulls, ship structures, and offshore equipment for marine applications.
5086 Aluminum Round Bar Applications
Applications of 5086 Aluminum Round Bar in the Marine Sector
Ship Structures
Used in superstructures, decks, bulkheads, etc., significantly reducing structural weight. For example, the superstructure of the U.S. "Dewey" destroyer used 5086 plate, reducing the weight by 150 tons after replacing steel.
Speedboats and High-Speed Vessels: such as hydrofoils, hovercraft, etc., the lightweight nature of 5086 (density 2.66 g/cm³) improves speed and fuel efficiency. The U.S. "Pegasus" missile hydrofoil uses 5456 alloy for welded structures, while 5086 is commonly used for auxiliary structures of similar high-speed hulls.
Marine Engineering Equipment
Pressure Vessels and Pipes: Used in seawater desalination equipment, refrigeration systems, etc., the corrosion resistance reduces maintenance costs.
Deep-Sea Equipment: While pitting rates may increase in deep-sea (>700m) environments, 5086 is still used in shallow-water equipment such as buoys and supports.
Hovercraft and Catamarans
The UK AP188 hovercraft hull is made of 5083 alloy, while 5086 is used for welded extrusions; high-speed catamarans in Norway and Japan also widely use aluminum-magnesium alloy structures to balance strength and corrosion resistance.
Other Applications of 5086 Aluminum Round Bar
- Pressure vessels and storage tanks
- Transport equipment: fuel tank trailers, truck frames
- Structural components requiring high strength and corrosion resistance
- Chemical industry: storage tanks, pipes
- Construction: coastal buildings, sidewalks
Its versatility and high performance make it the material of choice for these industries.
5086 Aluminum Round Bar Fabrication and Welding
5086 aluminum can be easily welded using various techniques, including MIG and TIG welding. It is renowned for its excellent weldability, which is crucial for structural components in industries like shipbuilding and transportation. However, care should be taken during welding to avoid a reduction in corrosion resistance in the heat-affected zone.
- Welding: Excellent TIG/MIG welding performance; no post-welding heat treatment required.
- Machining: Medium machinability; use sharp tools and lubricants.
- Forming: Easy to form in the annealed state; can be cold-formed in H tempers.
5086 Aluminum Round Bar Supply and Specifications
| Specification | Details |
| Size | Diameter ranges from 6 mm (0.25 inches) to 300 mm (12 inches), customizable |
| Shape | Extruded or cold-processed straight bars |
| Supply Condition | O, H32, H34, H112, or H116 (available depending on specific application requirements) |
| Surface Treatment | Finish: Typical supply condition |
| Anodizing/Coating: May be available, but not common; for marine-grade coatings, please consult the manufacturer | |
| Standards and Certifications | ASTM B209: Aluminum Plate/Sheet Specification |
| AMS 4008: Aerospace Material Specification | |
| EN 573-3: European Chemical Composition Standard |
Comparison with Other Marine Aluminum Alloys
- 5083: Higher strength, suitable for extreme marine applications. Choose 5083 aluminum (higher magnesium content, strength improved by 10–15%).
- 5052: Lower magnesium content, suitable for general applications. Choose 5052 aluminum (3% magnesium content, slightly lower strength, suitable for general corrosion environments).
5083 vs. 5086
- Composition difference: 5083 has higher magnesium content (4.0%–4.9%), with slightly lower tensile strength (110–136 MPa) compared to 5086 (≥240 MPa), but 5086 has better corrosion resistance.
- Application focus: 5083 is used for extreme marine environments (such as deep sea), while 5086 is more suitable for medium strength, frequently welded applications (such as superstructures).
5052 vs. 5086
5052 has lower magnesium content (2.2%–2.8%), lower strength, but is more cost-effective, suitable for structural components with general corrosion resistance requirements.
5086 Aluminum Round Bar Processing and Selection Recommendations
Supply Condition
Common conditions include O (annealed), H112, H116, etc. H116 condition enhances strength through cold working, suitable for structural components.
Forming Process
The O (annealed) condition is suitable for complex cold forming, while H condition requires control of deformation to avoid cracking.
Surface Treatment
Typically polished or anodized, but in marine environments, more reliant on natural oxide film protection. Special coatings need to be customized.
5086 Aluminum Round Bar Processing Considerations
- Cutting: Use sharp tools, low-speed, high-feed rate, and lubricants to reduce tool binding.
- Cold Forming: The annealed condition (O) is easiest to process; H conditions require controlling deformation to prevent cracking.
- Welding: Recommended to use 5356 or 5183 welding wire, avoid contamination from impurities.
5086 aluminum round bar combines durability, weldability, and corrosion resistance, making it the preferred choice for marine and corrosive environments. Be sure to confirm the temper condition and specifications meet project requirements.
5086 aluminum round bar is a high-strength, corrosion-resistant material, suitable for high-demand applications in shipbuilding, transportation, and pressure vessel industries. Its excellent weldability and resistance to stress corrosion cracking make it a reliable choice for various structural applications.
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