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Help Center7005-T6 Large Caliber Aluminum Round Tube 400mm OD 6mm Wall Bright Annealed Finish for Aerospace Components
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At Hemaokang Steel (Shandong) Co., Ltd., we are dedicated to delivering high-performance metal solutions for demanding industries. Our 7005-T6 Large Caliber Aluminum Round Tube with a 400mm outer diameter and 6mm wall thickness is engineered to meet the rigorous standards of aerospace manufacturing. With a bright annealed finish that enhances corrosion resistance and surface aesthetics, this product offers an optimal balance of strength, weight, and precision. Backed by our ISO9001-certified quality management system and a global export network, we ensure every tube meets the exacting requirements of your critical applications.
Product Overview: The 7005-T6 alloy belongs to the Al-Zn-Mg series, known for excellent weldability and high strength-to-weight ratio. This large-diameter tube is specifically designed for structural components in aerospace, where reliability and performance are non-negotiable. The bright annealed finish not only provides a smooth, reflective surface but also eliminates internal stresses, making it ideal for subsequent forming or machining operations.
| Parameter | Specification |
|---|---|
| Alloy | 7005 (Al-Zn-Mg) |
| Temper | T6 (Solution heat-treated + artificial aging) |
| Outer Diameter | 400 mm (±0.5 mm tolerance) |
| Wall Thickness | 6 mm (±0.2 mm tolerance) |
| Surface Finish | Bright Annealed (Ra ≤ 0.8 μm) |
| Length | Customizable (standard 6m, 12m, or as required) |
| Tensile Strength | ≥ 350 MPa (typical) |
| Yield Strength | ≥ 290 MPa (typical) |
| Elongation | ≥ 10% |
Key Features & Benefits:
High Strength-to-Weight Ratio: The 7005-T6 alloy offers superior strength comparable to 7075 but with better weldability, making it suitable for lightweight aerospace structures without compromising durability.
Bright Annealed Finish: This controlled atmosphere heat treatment produces a clean, oxide-free surface that enhances corrosion resistance, reduces friction, and improves aesthetics. It also minimizes micro-cracks and stress points, extending component lifespan.
Large Caliber Precision: With a 400mm OD and 6mm wall, this tube is ideal for large-diameter structural elements such as fuselage frames, wing spars, and landing gear supports. Tight dimensional tolerances ensure seamless integration into assemblies.
Excellent Machinability & Formability: The bright annealed condition provides a uniform microstructure that allows for precise cutting, drilling, and bending without cracking. This reduces secondary processing costs and waste.
Weldability: 7005 alloy can be welded using standard techniques (TIG, MIG) with minimal loss of strength, enabling complex fabrications. Post-weld heat treatment is optional for restoring full mechanical properties.
Corrosion Resistance: The natural oxide layer combined with bright annealed surface offers good resistance to atmospheric corrosion, suitable for both indoor and outdoor aerospace applications.
Applications: This tube is specifically designed for aerospace components where large diameters and thin walls are required. Common applications include:
Structural frames and stringers for aircraft fuselages
Wing spars and ribs
Helicopter landing gear components
Satellite launch vehicle structures
Aerospace fluid line conduits (with appropriate internal coatings)
Spacecraft support trusses
Quality Assurance: Every tube produced undergoes rigorous inspection including dimensional verification, mechanical testing, and surface quality checks. We maintain strict traceability from raw material to final product, ensuring compliance with aerospace industry standards. Our ISO9001 certification (since 2025) reflects our commitment to continuous improvement and customer satisfaction.
Why Choose Hemaokang Steel? As a newly established company in 2025, we have already built an impressive annual export value of US$50 million to US$100 million, serving clients across North America, South America, Europe, Asia, Africa, and Oceania. Our team of 51-100 experienced professionals is dedicated to providing customized solutions, competitive pricing, and reliable lead times. Located in Liaocheng, Shandong — a major steel production hub — we leverage local resources and logistics advantages to deliver high-quality products worldwide.
Frequently Asked Questions:
Q: What is the typical lead time for this tube?
A: Lead time is typically 15-30 working days depending on order quantity and customization requirements. For small standard sizes, we can offer faster delivery.Q: Can you provide cut-to-length service?
A: Yes, we offer custom cutting to specified lengths (±1 mm tolerance) at no additional charge for standard orders.Q: Is the bright annealed finish suitable for welding?
A: Absolutely. The bright annealed surface is clean and free of oils, making it ready for welding. However, for best results, we recommend storing tubes in a dry environment to avoid contamination.Q: What is the minimum order quantity (MOQ)?
A: MOQ is 1 piece for standard sizes, but for custom lengths or special requirements, please contact our sales team for details.Q: Do you have any third-party certifications?
A: Our company is ISO9001 certified. We can also arrange third-party inspection (e.g., SGS, BV) upon request at additional cost.Q: Can this tube be used for cryogenic applications?
A: 7005-T6 alloy retains good toughness at low temperatures, making it suitable for some cryogenic aerospace applications. However, please consult our engineers for specific design requirements.Q: How do you ensure the tube is free from internal defects?
A: We perform ultrasonic testing (UT) on critical sections as part of our quality control. Additional non-destructive testing (e.g., eddy current) is available upon request.Q: What packaging is used for export?
A: Each tube is individually wrapped with protective film, then bundled with wooden pallets or crates suitable for sea freight. We also offer custom packaging for fragile or high-value orders.
Conclusion: Hemaokang Steel's 7005-T6 Large Caliber Aluminum Round Tube combines aerospace-grade material, precision manufacturing, and a bright annealed finish to deliver exceptional performance in the most demanding applications. With our global export capabilities, ISO9001 quality system, and dedicated support team, we are your reliable partner for large-diameter aluminum tube solutions. Contact us today for a quote or technical consultation — let's build the future of aerospace together.
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