Seamless Aluminum Pipe 2024/3003/5083/6061/7075
Seamless aluminum tube/pipe is made without welds. This gives it better strength, pressure resistance, and corrosion performance than welded pipes. Welded pipes, including ERW (Electric Resistance Welded), are made by rolling and welding metal sheets. They have a weld seam, which can be a weak point. Seamless pipes are extruded from solid billets. This creates a uniform structure with no welds. ERW pipes are cost-effective and common in low-pressure uses like fencing or furniture. However, they may not hold up well under high stress or corrosive environments. Seamless aluminum pipes are ideal for tough applications. They are widely used in aerospace, automotive, and fluid systems.
Shenzhen Chinalcometal supply seamless aluminum tube/pipe:
Aluminum alloy :2017,2024,3003,5052,5083,6061,6082,7005,7020,7050,7075.
Production type:extruded seamless tube ,forged seamless pipe,cold drawn seamless tube, extra Larger diameter (max1500mm) seamless pipe.
Shape: round seamless tube ,square Seamless tube,rectangular seamless tube ,oval seamless tube and customized shape .
Standard : ASTM B210,ASTM B241/B241M,AMSWWT700B,ASTM B221
Chemical composition
| Alloy | Key Alloying Elements | Category |
|---|---|---|
| 5052 | Mg 2.2–2.8% | Non-heat-treatable corrosion-resistant |
| 5083 | Mg 4.0–4.9%, Mn 0.4–1% | Marine-grade, very high corrosion resistance |
| 6061 | Mg 0.8–1.2%, Si 0.4–0.8%, Cu 0.15–0.4% | Heat-treatable structural |
| 7075 | Zn 5.6–6.1%, Mg 2.1–2.9%, Cu 1.2–2.0% | Highest-strength heat-treatable |
| 2017 | Cu 3.9–4.9%, Mn 0.4–0.9% | High-strength, heat-treatable |
| 2024 | Cu 3.8–4.9%, Mn 1.2–1.8%, Mg 1.2–1.8% | High-strength aerospace alloy |
| 3003 | Mn 1.0–1.5% | Excellent formability, low strength |
| 6082 | Mg 0.6–1.2%, Si 0.7–1.3% | Medium strength, good corrosion resistance |
| 7005 | Zn 4.0–5.0%, Mg 1.0–1.5% | Structural use, heat-treatable |
| 7020 | Zn 5.5–6.1%, Mg 1.2–1.8% | High strength, heat-treatable |
| 7050 | Zn 6.2–6.9%, Mg 2.0–2.6%, Cu 1.2–1.6% | High-strength, aerospace alloy |
Mechanical properties
| Alloy / Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| 5052-O | 193 | 90 | 25–30 | 47 |
| 5083-O | 275 | 125 | 23 | 75 |
| 6061-T6 | 310 | 275 | 10–15 | 95 |
| 6061-O | 110 | 55 | 25 | 30 |
| 7075-T6 | 560–600 | 480–510 | 8–10 | 150 |
| 7075-T73 | 505 | 435 | 10–13 | 140 |
| 2017-T4 | 430–480 | 290–330 | 12–15 | 120 |
| 2024-T3 | 470–530 | 345–375 | 10–15 | 130 |
| 3003-O | 120 | 50 | 25–35 | 25 |
| 6082-T6 | 310 | 275 | 10–15 | 95 |
| 7005-T6 | 490–530 | 420–460 | 10–15 | 120 |
| 7020-T6 | 510–550 | 440–470 | 8–12 | 130 |
| 7050-T7451 | 530–580 | 460–490 | 8–10 | 145 |
Extruded Seamless Aluminum Tube
Extruded seamless aluminum tube is a hollow cylindrical aluminum product made by direct extrusion through a reverse extruder without any welds. Compared with welded tubes, this kind of aluminum tube is stronger and more reliable in high pressure and structural applications.
Alloy | Temper | Size | Applications |
6061 | T6 / T4 / T6511 | OD:10MM-280MM W.T.:4MM-60MM | Aerospace, automotive, structural |
6063/6082 | T6 | OD:10MM-260MM W.T.:4MM-60MM | Structural, transport |
2017/2024 | T3 / T4 | OD:10MM-300MM W.T.:4MM-60MM | Aerospace |
7020/7050 | T6 / T73 | OD:10MM-300MM W.T.:4MM-60MM | Aircraft frames, military |
5083/5086 | O / H112 | OD:10MM-260MM W.T.:4MM-60MM | Shipbuilding, marine hydraulics |
5052/3003 | O / H112 | OD:10MM-200MM W.T.:4MM-30MM | Aerospace, automotive, structural |
7075/7055 | T6 / T6511 | OD:10MM-300MM W.T.:4MM-60MM | Aircraft frames, military |
Forged Seamless Aluminum Pipe
Forged seamless aluminum tube is a hollow cylindrical product produced by forging and extrusion process without welding, free of pores, sand holes, high surface brightness and precision, with the characteristics of high strength, good structural integrity and high reliability in critical applications.
Forged Aluminum Alloy | Outside Diameter | Wall Thickness | Length |
6061,6063 T6 T651 5083 O H112 2017, 2024 T4 T351 7050,7055 T6 T7451 7075 T6 T73 | OD:200MM-1000MM | W:20MM-150MM | L:20MM-1100MM |
Key Characteristics of Forged Seamless Aluminum Pipe
No weld zone Stronger and more corrosion-resistant
High mechanical strength Especially in T6 or T651 tempers
Uniform grain structure Grain flow follows pipe geometry
Pressure resistance Ideal for pressure-critical systems
Good fatigue resistance Excellent for aerospace and structural use
Applications of forged seamless aluminum tube
Aerospace: Hydraulic lines, fuel manifolds, landing gear
Defense: Weapon frames, missile structures
Marine: Ballast systems, underwater tubing
Cryogenics: Liquid hydrogen/oxygen tanks
Oil & Gas: High-pressure delivery systems
Heavy Equipment: Cylinders, pipe systems under cyclic stress
Cold Drawn Seamless Aluminum Tube
Cold Drawn Seamless Aluminum Tube is an aluminum tube manufactured without welding and cold-worked through drawing, which improves dimensional precision, surface finish, and mechanical strength.The tube is pulled through a die and mandrel at room temperature. This process is ideal for high-tolerance and critical structural or fluid-carrying applications.
Alloy | Temper | Size | Description |
6061 | T6 / T4 | OD:6MM-160MM W.T.:1MM-10MM | General-purpose, aerospace & automotive |
6063 | T5 / T6 | OD:6MM-160MM W.T.:1MM-10MM | Excellent surface finish |
7075 | OD:6MM-180MM W.T.:1MM-10MM | Very high strength | |
2017 | T3 / T4 | OD:6MM-180MM W.T.:1MM-10MM | High strength, fatigue-resistant |
2024 | T3 / T4 | OD:6MM-180MM W.T.:1MM-10MM | High strength, fatigue-resistant |
5083 | O / H112 | OD:6MM-180MM W.T.:1MM-10MM | Marine-grade |
3003 | O / H112 | OD:6MM-150MM W.T.:1MM-10MM | General-purpose, aerospace & automotive |
Cold Drawn Seamless Tube vs Hot Extruded Seamless Tube
Property | Cold Drawn Seamless Tube | Hot Extruded Seamless Tube |
Dimensional Tolerance | Very tight | Moderate |
Surface Finish | Smooth (Ra ≤ 0.8 µm possible) | Rougher |
Strength | Higher (due to cold working) | Lower unless heat-treated |
Formability | Lower than annealed/extruded | Better |
Cost | Higher | Lower |
Application of cold drawn seamless aluminum tube
Aerospace Hydraulic & fuel lines, structural supports
Automotive Shock absorber tubes, steering columns
Medical Prosthetics, surgical instruments
Robotics & Automation Lightweight precision framing
Industrial High-pressure gas lines, instrumentation
Sports & Outdoor Bicycle frames, ski poles, arrows
Extra Larger Diameter Seamless Aluminum Pipe
Extra Large Diameter Seamless Aluminum Tubes refer to seamless extruded or forged aluminum hollow profiles with an outer diameter usually above 200 mm and up to 1500 mm, a wall thickness of 25 mm-300 mm, and a length of up to 18 meters, used in high strength, pressure or structural applications where the integrity of the weld seam is critical.
Aluminum Alloy | Outside Diameter | Wall Thickness | Length |
6061,6063 5083 2017, 2024 7075,7050,7055 | OD:200MM-1500MM | W:25MM-300MM | L:1000MM-18000MM |
Applications of Extra Larger Seamless Aluminum Pipes
Aerospace Rocket motor cases, satellite tanks, airframe cylinders
Marine & Offshore Ballast systems, fluid handling lines, structural arms
Oil & Gas / LNG Cryogenic tanks, high-pressure tubing
Nuclear & Defense Radiation-resistant piping, weapon systems
Heavy Equipment Hydraulic cylinders, boom arms
Architecture & Transport Bridge components, subway infrastructure, monorails
Shenzhen Chinalcometal's key process guarantees:
1.Surface Finish & Cleaning:
We offer a cold-drawn finish with a typical Ra ≤ 1.6 µm, ensuring a smooth, durable surface.
For hydraulic applications, we can achieve an inner bore finish of Ra ≤ 0.8 µm upon request.
2.Straightening & Stress Relief:
Many of our aerospace-grade tubes are delivered in T6511 temper, stress-relieved after stretching, which ensures improved straightness and minimizes distortion during machining.
3.Dimensional Control:
For critical aerospace applications, we adhere to AMS/WW-T tolerance subclasses (e.g., AMS 4079) to ensure exacting precision and close tolerance compliance.
4.Testing & Certification:
We provide comprehensive documentation, including MTC (EN 10204 3.1 / 3.2), tensile test reports, chemical analysis, and Non-Destructive Testing (NDT) (eddy current or ultrasonic), tailored for aerospace and pressure service requirements.
5.End Finishing:
Our tubes can be customized with a variety of end finishes such as chamfered, reamed, deburred, flared, expanded ends, or hydraulic fittings, all produced per customer specifications.
6.Bending & Forming:
For tight bends, we recommend ordering tubes in the O or T4 temper. We advise against bending 7075-T6 tubes (which have low formability) without annealing, ensuring no cracking or distortion.
7.Storage & Handling:
To prevent galvanic corrosion, we ensure proper insulation and dielectric washers for assemblies, particularly when tubes are in contact with dissimilar metals.
