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Help Center6061-T6511 Large Diameter Aluminum Pipe 350mm Outer Diameter 15mm Wall Extruded & Stress Relieved With Custom Lengths
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Welcome to Hemaokang Steel (Shandong) Co., Ltd. – your trusted partner in high-performance aluminum solutions. As a newly established yet rapidly growing enterprise with annual export value exceeding US$50 million, we are proud to introduce our premium 6061-T6511 Large Diameter Aluminum Pipe with 350mm outer diameter and 15mm wall thickness. This extruded and stress-relieved pipe is engineered to meet the most demanding structural and industrial applications, offering exceptional strength, dimensional stability, and corrosion resistance. With our ISO9001-certified quality management system and flexible customization options, we deliver products that align perfectly with your project requirements.
Our 6061-T6511 aluminum pipe stands out for its large diameter (350mm) and heavy wall (15mm), which provide superior load-bearing capacity and rigidity. The T6511 temper indicates that the material has been solution heat-treated, artificially aged, and then stress-relieved by stretching, resulting in minimal residual stress and excellent machinability. Whether you need standard lengths or custom cut-to-size pieces, we can accommodate your specifications with precise tolerances.
Key Features & Technical Specifications
- High Strength-to-Weight Ratio: 6061 aluminum alloy offers excellent mechanical properties while remaining lightweight, ideal for reducing overall structure weight.
- Stress Relieved Process: The stretching and stress relief operation ensures dimensional stability during machining and welding, preventing warping or distortion.
- Corrosion Resistance: Natural oxide layer provides good protection against atmospheric corrosion; optional anodizing enhances durability.
- Custom Lengths Available: We can supply pipes from 100mm up to 12,000mm, or as per your drawing, with tight length tolerances of ±2mm.
- Excellent Weldability & Machinability: 6061-T6511 is known for its good response to welding and machining, making it suitable for complex fabrication.
- Consistent Quality: Each pipe undergoes rigorous inspection including dimensional check, chemical composition analysis, and mechanical property test.
| Parameter | Value |
| Alloy & Temper | 6061-T6511 |
| Outer Diameter | 350 mm (13.78 in) |
| Wall Thickness | 15 mm (0.59 in) |
| Tensile Strength (min) | 310 MPa (45,000 psi) |
| Yield Strength (min) | 276 MPa (40,000 psi) |
| Elongation (min) | 10% |
| Length Tolerance | ±2 mm (customizable) |
| Surface Finish | Mill finish or anodized (optional) |
Advantages for Your Business
Our large diameter aluminum pipe is specifically designed for industries that require robust yet lightweight tubular components. In structural engineering, it serves as columns, beams, or trusses where weight reduction is critical. For aerospace and automotive applications, the stress-relieved condition ensures that after machining, the part maintains its shape and dimensions, reducing scrap rates. The marine industry benefits from its corrosion resistance when used in masts, rails, or support structures. Additionally, the customizable length eliminates unnecessary waste and reduces processing time for your production line.
Quality Assurance & Company Strength
At Hemaokang Steel, we operate under a strict ISO9001:2015 certified quality management system to ensure every pipe meets the highest standards. Our team of 51–100 skilled employees works with advanced extrusion presses and stress-relief ovens, capable of producing pipes with outer diameters up to 500mm. We have supplied materials to clients across North America, South America, Europe, Southeast Asia, Africa, Oceania, the Middle East, and Asia, with a total annual export value of US$50 million–US$100 million. Our location in Liaocheng, Shandong – a major steel and aluminum hub in China – gives us access to premium raw materials and efficient logistics.
We are committed to on-time delivery and competitive pricing without compromising quality. Every order is backed by comprehensive inspection reports, including chemical composition and mechanical properties. For large projects, we can also provide third-party testing (e.g., SGS, BV) upon request.
Frequently Asked Questions (FAQ)
Q1: What does the T6511 temper mean exactly?
A: T6511 indicates that the pipe has been solution heat treated, artificially aged, and then stress relieved by stretching (1–3% permanent stretch). This reduces internal stresses and provides a stable structure for machining and welding.
Q2: Can you supply pipes with other outer diameters or wall thicknesses?
A: Yes, we offer a wide range of sizes. While 350mm OD x 15mm wall is a standard product, we can produce custom dimensions with minimum order quantities. Please contact us with your specific requirements.
Q3: What is the maximum length you can provide?
A: Our standard maximum length is 12 meters (40 feet). For longer lengths, we can discuss split shipments or special handling. Custom lengths within that range are available with a tolerance of ±2 mm.
Q4: Is this pipe suitable for welding?
A: Yes, 6061-T6511 has good weldability using standard techniques (e.g., TIG, MIG). However, the heat-affected zone may lose some strength; post-weld heat treatment can restore properties if needed.
Q5: Do you offer anodized or other surface treatments?
A: Yes, we can provide anodizing (clear or colored) as an optional finish. Other treatments like bright dip or powder coating are also available upon request.
Q6: What certifications do you provide with the product?
A: Each shipment includes a mill test certificate (MTC) confirming chemical composition and mechanical properties per ASTM B221 / AMS 4150. Our facility is ISO9001 certified, and we can arrange third-party inspection if required.
Q7: What is the typical lead time for custom orders?
A: For standard sizes, lead time is 15–20 working days. Custom dimensions or large quantities may require 25–35 working days. We strive to accommodate urgent orders when possible.
Q8: How do you ensure the pipe is straight and round?
A: The extrusion process is followed by a straightening and stress-relieving step. We then perform 100% dimensional inspection using calibrated gauges. Our straightness tolerance is 1/1000 of the length.
Contact us today for a quotation or technical consultation. With our extensive inventory and flexible production, we are ready to support your next project with high-quality 6061-T6511 large diameter aluminum pipes.
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