Aluminum 7075-t6 and 7075-t6511 extruded bar AMS4186 Aerospace

At Shenzhen Chinalco Metal, we supply Aluminum 7075-T6 and 7075-T6511 extruded bars engineered for demanding structural and precision-machined applications. As a high-strength alloy from the Al-Zn-Mg-Cu series, 7075 delivers outstanding yield performance, dimensional stability, and fatigue resistance under continuous stress. These properties make it a preferred material for aerospace fasteners, aircraft fittings, automotive suspension parts, and precision tooling where every gram of weight savings matters.
The key distinction between T6 and T6511 lies in the stress-relief stretching process applied after heat treatment, which ensures improved machining accuracy and reduced distortion in long or complex profiles.

Aluminum 7075 Composition and Mechanical Properties

Aluminum 7075 contains zinc (5.6–6.1%), magnesium (2.1–2.5%), and copper (1.2–1.6%) as its main alloying elements, with trace amounts of chromium and others to enhance toughness and stress corrosion resistance.
Typical mechanical properties (T6 temper):

• Tensile strength: ~572 MPa (83 ksi)

• Yield strength: ~503 MPa (73 ksi)

• Elongation: 11%

• Brinell hardness: 150 HB

These properties make it one of the strongest commercial aluminum alloys available.

Aluminum 7075 Tensile Strength

Among aluminum alloys, 7075-T6 stands out with tensile strength comparable to some steels while maintaining light weight.
Its strength can reach up to 572 MPa (83 ksi), making it ideal for structural components like aircraft fittings, landing gear, and bicycle frames.

Aluminum 7075 Thermal Conductivity

Despite its high strength, 7075 aluminum also offers good thermal conductivity—typically around 130–150 W/m·K.
This allows efficient heat dissipation, an important factor in aerospace, defense electronics, and performance automotive parts.

Aluminum 7075 Tempers

7075 aluminum is available in several tempers, each designed for specific performance needs:

• T6: Solution heat-treated and artificially aged for maximum strength.

• T6511: Similar to T6 but stress-relieved by stretching after heat treatment—ideal for extruded profiles with high dimensional stability.

• O: Annealed for maximum ductility and formability.

• T73: Overaged for improved stress corrosion resistance, often used in marine or humid environments.

7075-T6 vs 7075-T6511

Both T6 and T6511 tempers offer similar mechanical strength, but differ in residual stress control and machining behavior:

• 7075-T6: Higher internal stress, slightly more distortion during machining or cutting.

• 7075-T6511: Stress-relieved by stretching, resulting in better dimensional accuracy and less warping—preferred for precision parts and long extrusions.
  In short, T6 is best for general use, while T6511 is better for tight-tolerance machining.

FAQ

Q1: How strong is 7075-T6 aluminum?
A: It is one of the strongest aluminum alloys, with a tensile strength of around 572 MPa (83 ksi), comparable to mild steel but much lighter.

Q2: What is material 7075-T6 aluminum?
A: It's an aluminum-zinc-magnesium-copper alloy heat-treated to the T6 condition, offering excellent strength and fatigue performance.

Q3: Can 7075 aluminum be welded?
A: 7075 has poor weldability due to its zinc and copper content, which can cause cracking. It's usually joined by mechanical fasteners instead.

Q4: Can you bend 7075 aluminum?
A: Bending 7075-T6 is difficult because it's hard and less ductile. Annealing (O temper) is recommended before forming.

Q5: What are the common applications of 7075-T6 aluminum?
A: Aerospace structures, defense equipment, high-performance bicycles, racing parts, and precision tooling.

Q6: What is the difference between 7075-T6 and 7075-T6511?
A: The main difference is stress relief—T6511 undergoes stretching to reduce internal stress, improving machinability and dimensional stability.

As a professional nonferrous metal supplier, we provide Aluminum 7075 extruded bars in various sizes and shapes (round, square, flat). 

Tempers: T6, T651, T73, T7351

Our services are tailored to meet buyer requirements:

• Precise slitting and cutting to custom lengths

• Tight tolerance control for aerospace-grade components

• Fast lead time and stable supply for both small and bulk orders

• Material traceability and certification ：ASTM B211, AMS 4122, AMS 4123, AMS 4124, AMS4186, AMS-QQ-A-225/9, ASTM B221, AMS 4154, AMS 4166, AMS 4167, AMS-QQ-A-200/11

Whether you need 7075-T6 or 7075-T6511 extruded bars, we ensure consistent quality, burr-free surfaces, and reliable delivery for your manufacturing needs.

7075 aluminum bar stock