7075 T6 T73 T73511 Aluminum Tube Cold Drawn Seamless
Aluminum alloy 7075 is one of the strongest commercial aluminum alloys, offering tensile strength up to 570–600 MPa, high fatigue resistance, and excellent strength-to-weight ratio. It is commonly supplied in tempers such as T6, T6511, T73, T73511, conforming to ASTM B241, ASTM B221, AMS-QQ-A-200/11, AMS-WWT-700/7, and EN 755-9 standards.
7075 aluminum composition
| Element | Zn | Mg | Cu | Cr | Fe | Si | Mn | Ti | Al |
|---|---|---|---|---|---|---|---|---|---|
| Content (%) | 5.1–6.1 | 2.1–2.9 | 1.2–2.0 | 0.18–0.28 | ≤0.50 | ≤0.40 | ≤0.30 | ≤0.20 | Balance |
7075 aluminum density and hardness properties
| Property | Typical Value | Notes |
|---|---|---|
| Density | 2.81 g/cm³ (≈2810 kg/m³) | Slightly higher than common aluminum alloys due to Zn and Cu content |
| Brinell Hardness | 150 HB (T6 temper) | Around 135 HB in T73, up to 160 HB in peak-aged condition |
| Young's Modulus | 71 GPa (≈10.3 × 10⁶ psi) | Indicates good stiffness and resistance to elastic deformation |
Tensile strength (UTS) represents the maximum stress a material can withstand before breaking under a tensile load, while yield strength (YS) indicates the stress at which a material begins to undergo permanent plastic deformation. In simple terms, yield strength reflects the load a material can carry without permanent deformation, whereas tensile strength reflects its capacity under ultimate load conditions. Understanding these two values helps analyze the differences in strength and application conditions of various 7075 aluminum alloy tempers. The table below shows the yield and tensile strengths of different tempers, making it easy to compare their performance characteristics.
Aluminum 7075 yield strength and tensile strength properties
| Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| 7075-O | 220–260 | 100–160 | 10–15 |
| 7075-T6 | 520–570 | 440–480 | 8–11 |
| 7075-T651 | 510–560 | 430–480 | 7–10 |
| 7075-T73 | 470–500 | 390–420 | 10–13 |
| 7075-T7351 | 460–490 | 380–410 | 10–12 |
| 7075-T7651 | 490–530 | 410–450 | 8–11 |
Advantages of 7075 cold drawn seamless aluminum tube
7075 cold drawn seamless aluminum tube combines ultra-high strength with light weight, achieving tensile strength up to 570 MPa—comparable to steel at only one-third the weight. This makes it ideal for aerospace, defense, and performance engineering applications requiring maximum strength-to-weight efficiency.
Through the cold drawing process, the tube gains exceptional dimensional accuracy, uniform wall thickness, and a smooth surface finish, ensuring tight tolerances and superior reliability in hydraulic, pneumatic, and precision mechanical systems. Its seamless structure eliminates weld defects, providing higher fatigue life and better internal pressure resistance under dynamic or cyclic loads.
Available in multiple tempers such as T6, T651, and T73, 7075 tubing offers excellent machinability, stiffness, and structural stability under stress. Enhanced heat-treated versions like T73 and T7351 also improve corrosion and stress-crack resistance, making 7075 cold drawn seamless tubes a trusted choice for high-performance, safety-critical components.
Size Range of 7075 Cold Drawn Seamless Aluminum Tube (T6 / T73 / T73511)
| Item | Specification Range |
|---|---|
| Alloy & Temper | 7075 – T6, T73, T73511 |
| Outer Diameter (OD) | 6 mm – 250 mm (0.25" – 10") |
| Wall Thickness (WT) | 0.5 mm – 25 mm (0.02" – 1.0") |
| Length | 10 mm – 6000 mm |
| Tolerance | ±0.05 mm – ±0.5 mm |
| Applicable Standards | ASTM B210, ASTM B241, ASTM B221, AMS 4069, AMS 4078, AMS-QQ-A-200/11, AMS-WWT-700/7, EN 754-8, EN 755-9 |
7075 aluminum tubing applications
7075 aluminum alloy is available in round tube, square tube, and special-shaped (custom profile) tube forms, each serving different structural and performance needs.
Round tubes are widely used in aerospace landing gear, bicycle frames, automotive suspension systems, and precision engineering parts where high strength-to-weight ratio and excellent fatigue resistance are required.
Square tubes are preferred for structural frameworks, machine supports, and transportation components that demand both rigidity and easy assembly.
Special-shaped tubes are often custom-designed for specific applications such as drone arms, aerospace structural fittings, and lightweight performance equipment, offering optimized aerodynamic and mechanical characteristics tailored to their use.
Shenzhen Chinalco Metal supplies a full range of 7075 aluminum tubes, including both cold drawn seamless and extruded types. Each product is delivered with a mill test certificate (MTC) to ensure full traceability and verified composition.
Our tubes feature precise dimensions, tight tolerances, and consistent mechanical properties, meeting the demands of aerospace, automotive, and precision engineering industries.
We guarantee stable quality, reliable accuracy, and prompt delivery — contact Shenzhen Chinalco Metal today for high-performance 7075 aluminum tubing tailored to your requirements.
