For engineers designing structures in marine, offshore, or heavy-humidity environments, material corrosion and weld seam failures are the biggest threats to safety and budget. Standard aluminum alloys often lose significant strength after welding or succumb to pitting corrosion when exposed to saltwater.
The 5086 aluminum tube is engineered specifically to eliminate these issues. As a premium aluminum-magnesium alloy, 5086 offers outstanding corrosion resistance, high tensile strength, and excellent post-weld structural integrity.
At GNEE, we supply industrial-grade 5086 aluminum pipes globally. Whether you need seamless tubes for pressure vessels or extruded pipes for boat frames, we provide certified materials with direct factory pricing.
What is 5086 Aluminum Tubing?
The 5086 aluminum pipe belongs to the 5000-series alloy family. Because it is alloyed primarily with magnesium, it is highly resistant to seawater and industrial chemicals.
Crucially, 5086 is a non-heat-treatable alloy. It achieves its high strength through cold working and strain hardening (such as H111, H112, or H32 tempers). This means it maintains excellent mechanical stability and does not require complex heat treatments during your fabrication process. It is widely recognized as a top-tier marine-grade structural pipe.
Equivalent Grades of 5086 Aluminum Alloy
If your engineering blueprints use different international standards, refer to this equivalent chart:
UNS: A95086
EN Standard: EN AW-5086 / EN AW-AlMg4
ISO: ISO AlMg4
JIS (Japan): A5086
GB (China): 5A06
Chemical Composition of 5086 Marine Aluminum Tube
The exact balance of magnesium makes 5086 tough yet workable. Our materials strictly comply with the following chemical limits:
| Element | Content (%) |
| Magnesium (Mg) | 3.5 – 4.5 |
| Manganese (Mn) | 0.20 – 0.70 |
| Chromium (Cr) | 0.05 – 0.25 |
| Iron (Fe) | Max 0.50 |
| Silicon (Si) | Max 0.40 |
| Zinc (Zn) | Max 0.25 |
| Titanium (Ti) | Max 0.15 |
| Copper (Cu) | Max 0.10 |
| Aluminum (Al) | Balance |
Mechanical Properties of 5086 Extruded Aluminum Tubes
The mechanical performance of 5086 depends on the temper. Below are the standard properties for the most commonly used tempers in structural engineering:
| Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
| 5086-O | 190 – 275 | 110 – 175 | 18 – 22 | 45 – 60 |
| 5086-H111 | 275 – 320 | 180 – 240 | 12 – 16 | 55 – 75 |
| 5086-H112 | 310 – 370 | 230 – 290 | 10 – 12 | 65 – 85 |
| 5086-H321 | 330 – 390 | 240 – 300 | 10 – 12 | 70 – 90 |
Physical Properties of AA5086 Aluminum Pipe
For fluid dynamics and structural weight calculations, use the following physical data:
- Density: 2.66 g/cm³ (Lighter than steel, improving fuel efficiency in transport)
- Melting Point: 607°C – 652°C
- Thermal Conductivity: 120 W/m·K
- Modulus of Elasticity: 70 GPa
- Electrical Conductivity: 34% IACS
5086 vs. 5083 Aluminum Pipe: Which Should You Buy?
This is the most common question we receive from procurement managers. While both are excellent 5000-series marine alloys, you must choose based on your specific fabrication needs.
1. Strength & Magnesium Content:
5083 Aluminum Pipe: Contains 4.0-4.9% Magnesium. It has higher tensile and yield strength.
5086 Aluminum Pipe: Contains 3.5-4.5% Magnesium. It is slightly lower in ultimate strength compared to 5083.
2. Formability & Bending:
5086 wins. Because of its slightly lower magnesium content, 5086 is less rigid. If your project requires bending the pipe into complex shapes or routing fluid lines through tight spaces, 5086 is much easier to work with and less prone to cracking during cold forming.
3. Application Focus:
Choose 5083 if: You are building heavy-duty ship hulls, massive offshore platforms, or structures where maximum load-bearing strength is the only priority.
Choose 5086 if: You are fabricating pressure vessels, light vehicle frames, boat masts, or systems that require a perfect balance of medium-high strength, excellent weldability, and complex bending.
Key Applications of 5086 Seamless and Welded Aluminum Tubing
Thanks to its fatigue resistance and stability, 5086 is the material of choice for:
- Shipbuilding & Marine Engineering: Boat hull frameworks, deck supports, floating docks, and seawater cooling pipelines.
- Pressure Vessels: Unfired pressure vessels, cryogenic storage tanks, and high-pressure fluid lines.
- Commercial Transportation: Heavy-duty truck chassis, trailer frames, and railway car components where weight reduction is necessary.
- Aerospace Support: Non-primary structural components and fluid transmission equipment.
Surface Treatments and Export Packaging at GNEE
While 5086 aluminum tubing naturally resists corrosion, we offer surface treatments based on your project needs, including mill finish, clear anodizing, hard-coat anodizing, and powder coating.
- Export Packaging: To ensure your pipes arrive without scratches or dents, GNEE uses standard seaworthy packaging. The tubes are capped, wrapped in waterproof plastic film, bundled tightly, and secured in fumigated wooden crates suitable for global ocean freight.
Do not risk your project's integrity by using substandard or uncertified alloys. As a direct manufacturer and supplier, GNEE ensures that every pipe you receive is traceable and tested.
Send us your inquiry now and get:
- A highly competitive price quote within 24 hours.
- A Free EN 10204 3.1 Mill Test Certificate (MTC) sample for your engineers to review before ordering.
- Fast dispatch from our extensive inventory of standard ASTM sizes.
Contact the GNEE sales team today with your required Outer Diameter (OD), Wall Thickness (WT), Length, and quantity!
Get a Fast Quote for 5086 Aluminum Pipe Today