6061 T6 T4 O Aluminum Seamless Tube AMS 4080–4083
AMS 4080–4083 specifications cover 6061 aluminum seamless tubes used in structural, hydraulic, and formable aerospace applications. AMS 4082 / WW-T-700/6 and AMS 4083 are the primary choices for aircraft hydraulic systems, while AMS 4080 and AMS 4079 (O-temper) are selected for parts requiring tight bending or custom forming.
AMS 4082 (6061-T6) is a drawn seamless tube offering high strength and reliable performance in general structural components and high-pressure hydraulic lines.
AMS 4080 (6061-O) provides a fully annealed, highly formable tube suitable for tight bends and parts that will be heat-treated after forming.
AMS 4079 (6061-O, Close Tolerance) offers precise OD/ID control in a soft condition, ideal for precision-formed aerospace components.
AMS 4083 (6061-T6 Hydraulic Grade) is specially tested for hydraulic fluid service, ensuring high cleanliness and pressure integrity for aircraft hydraulic tubing, landing-gear lines, and actuator systems.
Mechanical Properties of 6061-T6 / T4 / O Aluminum Seamless Tube
| Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) | Density (g/cm³) |
|---|---|---|---|---|---|
| 6061-O | 124 | 55 | 25–30 | 30 | 2.7 |
| 6061-T4 | 241 | 145 | 14–16 | 65 | 2.7 |
| 6061-T6 | 310 | 276 | 12 | 95 | 2.7 |
Aluminum 6061 Seamless Tube / Pipe Sizes
| Outer Diameter (OD) | Wall Thickness | Length |
|---|---|---|
| 1/8” – 8” (3.2–203 mm) | 0.015” – 0.500” (0.4–12.7 mm) | Up to 20 ft (6 m) |
Tight tolerances available per AMS 4079 (±0.005" or better).
6061-T6 / T4 / O aluminum seamless tubes applications
In the aerospace and aviation sector, 6061 seamless tubes are commonly used in hydraulic and pneumatic systems as well as airframe structures, including hydraulic actuator tubes, landing-gear brace tubes, strut housings, and airframe framing sections.
In automotive and racing, the alloy's strength-to-weight advantage makes it ideal for roll cages, chassis reinforcement tubes, steering columns, and suspension linkages, helping reduce mass while maintaining rigidity.
For marine and offshore applications, the corrosion resistance of 6061 aluminum makes it suitable for marine ladder rails, masts, radar towers, and engine coolant lines exposed to saltwater environments.
In industrial equipment, 6061 seamless tubes are used in high-pressure pneumatic and hydraulic systems for parts such as cylinder barrels, manifold connectors, and fluid power conduits.
Within architecture and construction, they serve as durable structural members, including handrails, canopy supports, and curtain-wall framing.
The defense industry also relies on 6061 tubes for lightweight, high-stiffness components such as drone frames, weapon-system housings, gun-barrel shrouds, and vehicle rollover protection structures.
Why Choose Our 6061-T6 / T4 / O Aluminum Seamless Tubes?
Shenzhen Chinalco Metal supplies AMS- and WW-T-700-certified 6061 seamless tubes with stable mechanical properties, clean internal surfaces, and precise dimensional control. Our tubes deliver high strength-to-weight performance, excellent corrosion resistance, good weldability, and low-resistance flow, making them ideal for aerospace, hydraulic, automotive, marine, and structural applications.
As a professional 6061 aluminum pipe distributor, we keep large inventories in T6, T4, and O tempers, covering a full OD and wall-thickness range for fast shipment. We also support custom production, including special OD/ID sizes, tight tolerances (AMS 4079), long-length tubing, and temper-specific heat treatment.
Temper Overview
6061-T6: High strength; best for structural and pressure systems such as hydraulic tubes, airframes, and chassis components.
6061-T4: Good formability; suitable for bent or welded fuel, vent, and fluid-transfer lines.
6061-O: Excellent formability; ideal for bent conduits, marine rails, and heat-exchanger tubing.
Our seamless tubes are produced through extrusion → cold drawing → heat treatment, ensuring uniform quality and compliance with aerospace and military standards.
