Aluminum 7075 T6 T6511 Extruded Bar AMS4186 Aerospace Use

7075 extruded round bar (T6/T6511) is produced using an extrusion process, where the aluminum alloy billet is forced through a die under high temperature and pressure to achieve continuous forming. This process refines the grain structure, resulting in a dense, uniform microstructure with excellent mechanical consistency and superior dimensional stability.

The T6 temper is obtained through solution heat treatment followed by artificial aging, providing high strength, high hardness, and strong load-bearing capacity, making it suitable for high-stress structural applications. The T6511 temper is based on T6 but includes an additional stretching process to relieve internal stresses, effectively reducing residual stress and minimizing deformation risk. This results in improved machining stability and higher precision for complex components.

7075 extruded round bars are widely used in aerospace structural parts, automotive load-bearing components, and high-precision engineering applications.

7075 T6 T6511 Aluminum Bar Stock

 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.

7075 Aluminum Bar 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.

7075 Aluminum Bar 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 Bar 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.

Our services

• 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.