Henan Gnee New Material Co., Ltd. is one of the most reliable manufacturers and suppliers of 5083-h321 aluminum alloy extruded pipes in China. With abundant experience, we warmly welcome you to wholesale high quality 5083-h321 aluminum alloy extruded pipes in stock here from our factory. Good service and reasonable price are available.
5083-H321 Aluminum Alloy Extruded Pipes Description
5083-H321 aluminum extruded pipes are high-strength, marine-grade aluminum products engineered for exceptional performance in harsh environments. Renowned for their superior resistance to seawater corrosion and excellent weldability, these pipes are the industry standard for shipbuilding, offshore engineering, and critical structural applications where durability, safety, and lightweight properties are mandatory.
As a leading industrial supplier, we provide a comprehensive range of 5083-H321 extruded pipes manufactured to strict international standards. Our advanced extrusion capabilities and large inventory enable us to support large-scale marine projects and time-sensitive industrial requirements worldwide.
Key Product Highlights:
- Marine-Grade Corrosion Resistance: Specifically tempered to resist exfoliation and intergranular corrosion in saltwater.
- High Strength-to-Weight Ratio: Delivers strength comparable to mild steel at approximately one-third of the weight.
- Excellent Weldability: Retains high strength in the Heat-Affected Zone (HAZ), ideal for large, welded structures.
- Custom Extruded Sizes: Available in a wide range of outer diameters (OD) and wall thicknesses (WT) to meet your exact project specifications.
- Certified for Harsh Environments: Compliant with ASTM, EN, and major marine classification society standards.
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The 5083 aluminum alloy belongs to the 5xxx series, a family of non-heat-treatable aluminum-magnesium (Al-Mg) alloys. With a high magnesium content (4.0% to 4.9%), 5083 is one of the strongest non-heat-treatable grades available, prized for its toughness and structural integrity.
The H321 temper is a specialized strain-hardening and stabilization process. The material is first strain-hardened (cold-worked) to increase its strength and then subjected to a low-temperature thermal treatment. This stabilization process is critical: it optimizes the microstructure of the alloy to prevent susceptibility to stress corrosion cracking and exfoliation corrosion, which can be a risk for high-magnesium alloys in certain conditions. This makes the H321 temper exceptionally stable and reliable for long-term service in marine environments.
Our extruded 5083-H321 pipes offer distinct advantages over other manufacturing methods:
Chemical Composition: EN AW-5083 Aluminum
The chemical composition of our 5083 aluminum strictly conforms to international standards like EN 573-3 and ASTM B241, ensuring predictable performance and weldability.
| Element | Content Limit (%) |
| Magnesium (Mg) | 4.0 – 4.9 |
| Manganese (Mn) | 0.4 – 1.0 |
| Chromium (Cr) | 0.05 – 0.25 |
| Silicon (Si) | ≤ 0.4 |
| Iron (Fe) | ≤ 0.4 |
| Copper (Cu) | ≤ 0.1 |
| Zinc (Zn) | ≤ 0.25 |
| Titanium (Ti) | ≤ 0.15 |
| Aluminum (Al) | Balance |
Mechanical Properties of 5083 H321 Aluminum Plate
The guaranteed mechanical properties of 5083-H321 are what make it a reliable choice for structural and high-pressure piping systems.
| Mechanical Property | Typical Value |
| Tensile Strength | 300 – 350 MPa |
| Yield Strength | 215 – 260 MPa |
| Elongation | 10% – 16% |
| Hardness (Brinell) | ~ 75 HBW |
| Density | 2.66 g/cm³ |
Key Features and Engineering Advantages
The decision to specify 5083-H321 is driven by four key engineering advantages.
Unmatched Corrosion Resistance
5083 aluminum is a true marine-grade alloy. The high magnesium content creates a dense, self-healing oxide layer that provides exceptional protection against saltwater, salt spray, and harsh industrial chemicals. The H321 temper further guarantees this resistance against intergranular attack over decades of service.
High Strength with Low Weight
The high yield strength of 5083-H321 allows engineers to design strong, durable structures with thinner wall thicknesses compared to other materials. Its low density (approximately 30% that of steel) drastically reduces the overall weight of a ship or platform, leading to improved fuel efficiency, higher speeds, and increased cargo capacity.
Excellent As-Welded Properties
Unlike heat-treatable alloys like 6061, 5083 is a non-heat-treatable alloy that retains a very high percentage of its strength after welding. This is a critical advantage in shipbuilding, where extensive MIG and TIG welding is required to join large structural components. No post-weld heat treatment is needed, which simplifies and accelerates the construction process.
Superior Extrusion Quality
Our seamless extruded pipes are manufactured with high precision, ensuring uniform wall thickness and concentricity. This is vital for high-pressure piping systems where inconsistencies could lead to weak spots and potential failures.
Specifications for 5083 Extruded Pipes
We offer a wide range of specifications to meet diverse industrial and marine project requirements.
| Specification | Details |
| Outer Diameter (OD) | 4 mm – 600 mm |
| Wall Thickness (WT) | 1 mm – 25 mm |
| Length | Standard lengths up to 12 meters, or custom cut-to-length services. |
| Available Tempers | H321, H116 (for plates/sheets), H111 |
| Manufacturing Standard | ASTM B241, EN AW-5083, GB/T, ISO standards |
Are you designing a marine piping system and require specific certification data? Contact our technical team today for a free consultation. We can provide full Mill Test Certificates (MTC) and support documentation for marine classification society approvals (DNV, ABS, etc.).
Applications of 5083 Aluminum Extruded Tubes
The unique properties of 5083-H321 make it the material of choice for demanding applications.
| Industry | Specific Application |
| Shipbuilding | Hulls, superstructures, masts, frames, and portholes for patrol boats, yachts, and large vessels. |
| Marine Piping Systems | Seawater cooling systems, ballast water lines, bilge piping, and deck drainage systems. |
| Offshore Structures | Handrails, walkways, helidecks, and structural trusses on oil and gas platforms. |
| LNG & Cryogenic Systems | Piping and storage for Liquefied Natural Gas (LNG), as 5083 retains its toughness at cryogenic temperatures. |
| Structural Frameworks | Trusses, bridges, and other lightweight structural applications in corrosive environments. |
5083 vs 6061 Aluminum Pipe Material Comparison
For structural applications, engineers often compare 5083 with the more common 6061 alloy. For marine use, the choice is clear.
| Property | 5083 Aluminum | 6061 Aluminum |
| Seawater Resistance | Excellent | Moderate (Prone to pitting) |
| As-Welded Strength | High Retention | Significant Loss |
| Marine Suitability | Ideal | Limited (Only for non-critical, above-water use) |
Our Production and Quality Control Capabilities
We operate state-of-the-art extrusion lines and a comprehensive quality management system to ensure every pipe we produce meets or exceeds international standards.
Quality Control and Certification
Our commitment to quality is backed by rigorous testing and certification.
ISO 9001:2015 certified manufacturing facilities.
Mill Test Certificates (MTC) compliant with EN 10204 3.1 are provided with every shipment.
Third-party inspection services available from agencies like SGS, BV, and TUV.
Marine certifications available upon request from major classification societies, including DNV, ABS, and Lloyd's Register.
Packaging and Global Shipping
We understand the importance of protecting your material during international transit.
Standard seaworthy export packaging designed to prevent moisture and physical damage.
Pipes are bundled and securely placed in reinforced wooden cases or on custom pallets.
Each pipe is wrapped with a protective film, and bundles are further protected with waterproof wrapping.
FAQ
Q: What is 5083-H321 aluminum pipe?
A: It is a high-strength, non-heat-treatable aluminum-magnesium alloy pipe that has been strain-hardened and thermally stabilized (H321 temper) to provide maximum resistance to corrosion in marine environments.
Q: Is 5083 aluminum pipe marine grade?
A: Yes. 5083 is widely recognized as the premier marine-grade aluminum alloy due to its exceptional performance in saltwater.
Q: Can 5083 pipes be welded?
A: Yes, 5083 has excellent weldability using standard MIG and TIG processes. Importantly, it retains a high percentage of its strength after welding, making it ideal for large fabricated structures.
Q: What is the difference between H116 and H321?
A: Both are certified marine tempers for 5083. H116 applies primarily to plates and sheets, while H321 is often specified for extruded products like pipes to ensure optimal stabilization and dimensional control. Both offer excellent corrosion resistance.
Q: What industries use 5083 pipes?
A: It is primarily used in shipbuilding, offshore oil and gas platforms, LNG transportation and storage, and any structural application requiring a combination of high strength, light weight, and corrosion resistance.
Get a Fast Quote for 5083-H321 Aluminum Pipes
Our team of export specialists is ready to support your project with high-quality materials and professional service. Contact us today to discuss your requirements.
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- High Dimensional Accuracy: Delivers consistent and precise outer diameters, wall thicknesses, and straightness.
- Smooth Surface Finish: Provides an excellent substrate for painting, coating, or anodizing if required.
- Consistent Mechanical Properties: The extrusion process ensures uniform strength and hardness throughout the entire length of the pipe.
- Advanced Extrusion Lines: Capable of producing a wide range of complex profiles with tight tolerances.
- Precision Cutting and Machining: We offer cut-to-length services to deliver components ready for your assembly line.
- Strict Quality Control: Every batch is subjected to chemical analysis, mechanical property testing (tensile, yield, elongation), and dimensional checks.
- Large Inventory: We maintain a large stock of standard-sized 5083-H321 pipes for fast delivery to meet urgent project deadlines.
- Flexible Sourcing: We support mixed-container orders, allowing you to combine 5083 pipes with other alloys like 5052, 6061, or 7075 to optimize your procurement.
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