7075-T6 Aluminum seamless tube

The 7075-T6 seamless aluminum tube combines exceptional strength, lightweight design, and dimensional precision, making it one of the most trusted materials for aerospace, high-end mechanical, and performance applications.

With a tensile strength ≥560 MPa and yield strength ≥495 MPa, it delivers the strength of steel at only one-third the weight (density 2.8 g/cm³). Its seamless structure eliminates weld seams, avoiding stress concentration and greatly improving pressure resistance and structural integrity.
After anodizing or other surface treatments, corrosion and wear resistance are significantly enhanced. The material’s excellent machinability allows precision milling, drilling, and thread rolling for complex parts used in hydraulic, structural, and high-load systems.

What is 7075-t6 aluminum?

7075-T6 aluminum alloy belongs to the 7000 series (Al-Zn-Mg-Cu system) and is one of the highest-strength commercial aluminum alloys available.
The “T6” temper refers to solution heat treatment followed by artificial aging, providing outstanding strength and hardness while maintaining good machinability.

Properties of 7075-t6 aluminum alloy

Mechanical Properties — Strength and Toughness

• Tensile strength: 570–590 MPa

• Yield strength: ≈500 MPa

• Elongation: 11–13%
  7075-T6 far exceeds 6061-T6 (≈310 MPa) in strength and approaches mild steel levels. Its moderate ductility helps prevent brittle fracture, ensuring reliable load-bearing performance.

Physical Properties — Density and Thermal Characteristics

• Density: 2.81 g/cm³

• Melting range: 475–635°C
  The alloy achieves an ideal strength-to-weight ratio, critical for aerospace and performance vehicles. Hot working requires temperature control to prevent segregation or uneven grain structure.

Corrosion Resistance

• Untreated: Moderate

• High Zn and Mg content makes it susceptible to intergranular corrosion in humid or marine environments.

• Surface protection (anodizing, plating, or painting) is recommended for outdoor and marine use.

Thermal Stability

• Service temperature: ≤120°C
  Beyond 120°C, the strengthening precipitates (MgZn₂) begin to dissolve, reducing mechanical strength. Not suitable for prolonged high-temperature exposure.

Electrical and Thermal Conductivity

• Conductivity: ~33% IACS
  Lower than pure aluminum (61% IACS) and 6xxx series; mainly for structural rather than conductive applications.

Processing and machining characteristics

Machinability and Cutting Performance

Excellent machinability allows milling, turning, drilling, and thread rolling for complex shapes.
Use high-speed steel or carbide tools to reduce tool wear. Post-machining stress-relief annealing is recommended to avoid distortion or cracking.

Welding and Joining Limitations

7075-T6 is not weld-friendly. The Zn and Mg content leads to hot cracking and strength loss (30–50%) in the heat-affected zone.
Friction stir welding or using 7075-T651 grades is preferred when joining is required.

Cold and Hot Forming

• Cold forming: Moderate; suitable for simple bends or punches.

• Hot forming: Good; can be forged or extruded into large components such as aircraft frames.
  Post-forming T6 heat treatment is necessary to restore full strength.

Surface Treatment and Finishing Options

• Highly suitable for anodizing (natural or black finishes) and chromate conversion coatings, providing excellent wear resistance and paint adhesion.

• Finishing enhances both durability and appearance for premium applications.

Applications of 7075-t6 seamless tube

Because of its high strength-to-weight ratio, 7075-T6 seamless aluminum tube is widely used in strength-critical and weight-sensitive applications:

Aerospace and Defense

Aircraft fuselage frames, wing spars, landing gear components, and engine housing structures.

High-End Industrial Equipment

Drone frames, propellers, robotic joints, precision machine spindles, and high-hardness mold bases.

Automotive, Racing, and Transportation

Racing chassis, high-speed train seat frames, and ship deck structures — achieving lighter weight and higher performance.

Sports and Outdoor Equipment

Trekking poles, premium bicycle frames, and lightweight military-grade accessories.

6061-t6 aluminum vs 7075

Why choose 7075-t6 seamless aluminum tube

7075-T6 seamless aluminum tube is ideal for engineers and manufacturers seeking maximum strength, precise tolerances, and reduced weight.
It offers superior performance-to-weight ratio, reliable pressure containment, and tight dimensional control, making it a top choice for aerospace, defense, racing, and high-end industrial systems.

Stock list of 7075 T6 Aluminum Seamless tube

 Standard:

    AMSWWT700/7

    AMSQQA200/11

    BS EN 573, BS EN 755, BS EN 754