ASTM B241 Aluminum Alloy 5083 O Pipes | EN AW-5083 H112 Seamless Aluminum Tubes for Marine & Offshore Applications
ASTM B241 Aluminum Alloy 5083 Pipes are high-strength aluminum-magnesium alloy pipes designed for marine, offshore, cryogenic, chemical processing, and industrial piping applications. Manufactured from EN AW-5083 (AlMg4.5Mn0.7) aluminum alloy, these pipes offer outstanding corrosion resistance, excellent weldability, lightweight construction, and exceptional performance in seawater environments.
We are a professional manufacturer and exporter of ASTM B241 Aluminum 5083 Pipes, EN AW-5083 H112 Pipes, 5083 Seamless Aluminum Tubes, and Marine Grade Aluminum Piping Systems in China.
Aluminum Alloy 5083 is one of the strongest non-heat-treatable aluminum alloys available. Due to its high magnesium content, Alloy 5083 provides superior resistance to seawater corrosion and industrial chemicals, making it the preferred material for shipbuilding, offshore platforms, LNG facilities, and pressure vessels.
What is ASTM B241 Aluminum 5083 Pipe?
ASTM B241 is the standard specification covering seamless aluminum-alloy pipe and seamless extruded tube for pressure and structural applications.
ASTM B241 5083 pipes are manufactured from marine-grade aluminum alloy 5083 and are widely used where a combination of lightweight properties, corrosion resistance, and structural strength is required.
Compared with carbon steel and stainless steel piping, 5083 aluminum pipes offer:
- Up to 65% weight reduction
- Excellent seawater corrosion resistance
- Superior weldability
- High strength-to-weight ratio
- Excellent cryogenic performance
- Low maintenance costs
Equivalent Grades of Alu 5083
| Standard | Grade |
|---|---|
| ASTM / AA | 5083 |
| EN | EN AW-5083 |
| ISO | AlMg4.5Mn0.7 |
| DIN | AlMg4.5Mn |
| UNS | A95083 |
| JIS | A5083 |
| BS | 5083 |
| NF | A-G4MC |
Available Tempers
We supply 5083 aluminum pipes in various tempers:
- 5083-O
- 5083-H111
- 5083-H112
- 5083-H116
- 5083-H321
5083 H112 Pipe
The H112 temper is obtained through hot working and controlled manufacturing processes, providing a balanced combination of strength, ductility, and weldability.
5083 H112 pipes are commonly used in:
- Marine piping
- Shipbuilding structures
- Offshore modules
- LNG installations
- Industrial process piping
ASTM B241 Aluminum 5083 Pipe Specifications
| Item | Specification |
|---|---|
| Product | Aluminum Alloy 5083 Pipe |
| Standard | ASTM B241 / ASME SB241 |
| Alloy | 5083 |
| UNS | A95083 |
| EN Grade | EN AW-5083 |
| Temper | O, H111, H112, H116, H321 |
| Manufacturing | Seamless / Extruded |
| Pipe Shape | Round |
| Outside Diameter | 1/4″ – 12″ |
| Wall Thickness | SCH 10 – SCH 160 |
| Length | 3m, 6m, 12m or Custom |
| Ends | Plain End, Beveled End, Threaded |
| Surface | Mill Finish |
Chemical Composition of Aluminum 5083
| Element | % |
|---|---|
| Magnesium (Mg) | 4.0 – 4.9 |
| Manganese (Mn) | 0.4 – 1.0 |
| Chromium (Cr) | 0.05 – 0.25 |
| Silicon (Si) | ≤ 0.40 |
| Iron (Fe) | ≤ 0.40 |
| Copper (Cu) | ≤ 0.10 |
| Zinc (Zn) | ≤ 0.25 |
| Titanium (Ti) | ≤ 0.15 |
| Aluminum (Al) | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 275 – 350 MPa |
| Yield Strength | ≥125 MPa |
| Elongation | ≥12% |
| Hardness | 75 HB |
| Density | 2.65 g/cm³ |
Physical Properties
| Property | Value |
|---|---|
| Density | 2650 kg/m³ |
| Melting Point | 570°C |
| Elastic Modulus | 72 GPa |
| Thermal Conductivity | 121 W/m·K |
| Electrical Resistivity | 0.058 × 10⁻⁶ Ω·m |
| Thermal Expansion | 25 × 10⁻⁶ /K |
Why Choose Aluminum 5083 Pipes?
Excellent Seawater Corrosion Resistance
5083 aluminum alloy is one of the most corrosion-resistant aluminum grades available and performs exceptionally well in seawater and offshore environments.
Lightweight Construction
Aluminum 5083 weighs approximately one-third of carbon steel, reducing installation costs and structural loads.
Outstanding Weldability
Suitable for MIG and TIG welding processes while retaining excellent mechanical properties after welding.
Cryogenic Service Capability
Maintains strength and toughness at extremely low temperatures, making it ideal for LNG and cryogenic storage systems.
Long Service Life
Reduced maintenance requirements compared to carbon steel piping systems.
Marine & Shipbuilding Applications
ASTM B241 5083 aluminum pipes are extensively used in:
- Shipbuilding
- Fast ferries
- Naval vessels
- Offshore platforms
- Yacht construction
- Deck piping systems
- Ballast systems
- Cooling water systems
- Fire-fighting systems
- LNG carriers
Available with marine certificates:
- ABS
- DNV
- LR
Industrial Applications
Offshore & Oil Platforms
Excellent resistance to seawater corrosion and marine atmosphere.
LNG & Cryogenic Plants
Suitable for low-temperature service where toughness and reliability are critical.
Chemical Processing
Used in corrosive environments requiring lightweight piping solutions.
Transportation Industry
Applied in tank trucks, railway systems, and lightweight structural components.
Heat Exchanger Systems
Excellent thermal conductivity improves heat transfer efficiency.
Inspection & Testing
All ASTM B241 Aluminum 5083 pipes can be supplied with:
- Chemical Analysis
- Mechanical Testing
- Dimensional Inspection
- PMI Testing
- Visual Inspection
Certification:
- EN 10204 3.1
- EN 10204 3.2
Related Aluminum Products
We also manufacture:
- Aluminum 5083 Elbows
- Aluminum 5083 Tees
- Aluminum 5083 Reducers
- Aluminum 5083 Flanges
- Aluminum 5083 Plates
- Aluminum 5083 Round Bars
- Aluminum 5083 Marine Sheets
How to Order ASTM B241 Aluminum 5083 Pipes?
Example 1
Product: Seamless Aluminum Pipe
Standard: ASTM B241
Material: Aluminum Alloy 5083 H112
Size: 6″ NPS
Wall Thickness: SCH 40
Length: 6000 mm
Ends: Beveled Ends
Quantity: 100 PCS
Example 2
Product: EN AW-5083 Seamless Pipe
Temper: H321
OD: 168.3 mm
Wall Thickness: 7.11 mm
Length: 12 Meters
Certification: DNV 3.2
FAQ
Is 5083 aluminum suitable for seawater applications?
Yes. 5083 is one of the most corrosion-resistant aluminum alloys and is widely used in marine and offshore environments.
What is the difference between 5083 H112 and 5083 H321?
H112 is obtained through hot working, while H321 is strain-hardened and stabilized specifically for marine applications with enhanced corrosion resistance.
Can ASTM B241 5083 pipes be supplied with marine certifications?
Yes. ABS, DNV, BV, LR, CCS, and NK certificates are available upon request.
Is Aluminum 5083 stronger than Aluminum 6061?
For marine environments, 5083 is generally preferred because of its superior corrosion resistance and excellent weldability, while 6061 offers higher machinability.
