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7075 T73511 Extruded Bar

7075-T73511 extruded bars are made from 7075 aluminum alloy, one of the highest strength aluminum alloys available. The product is manufactured using an extrusion process, ensuring excellent dimensional consistency and shape variety—typically in rectangular or flat bar forms.

7075 T73511 extruded bars are formed from 7075 aluminum alloy using the extrusion process and are heat-treated to the T73511 temper.

7075-T73511 extruded aluminum bars are high-performance aerospace alloys known for their outstanding strength-to-weight ratio, stress corrosion resistance, and suitability for harsh applications.

7075 T73511 Extruded Bar

7075 T73511 Extruded Bar Alloy Composition

  • Approximately 90% aluminum
  • 5.1–6.1% zinc
  • 1.2–2.0% copper
  • 2.1–2.9% magnesium
  • Small additions of chromium, silicon, manganese, and titanium

7075 Extruded Bar Tempering (T73511)

Achieved through solid solution heat treatment, followed by artificial aging and stress relief (through controlled stretching and straightening).

The T73511 temper is meticulously designed to maximize stress corrosion resistance while maintaining a very high level of strength.

The T73511 designation refers to a multi-step heat treatment and mechanical process:

  • Solid solution heat treatment: Heating the alloy to dissolve precipitates.
  • Stress relief: Stretching (1-3%) to eliminate internal stresses generated during extrusion.
  • Artificial aging: Over-aging to enhance stress corrosion resistance.
  • Light straightening: Ensuring dimensional accuracy.

Compared to T6, this temper reduces strength by approximately 10-15%, but significantly improves corrosion resistance and dimensional stability.

7075 T73511 Extruded Bar Mechanical and Physical Properties

Strength and Performance:

  • Outstanding strength-to-weight ratio—comparable to or exceeding some low-carbon steels, while maintaining the lightweight properties of aluminum.
  • Excellent fatigue resistance, making it an ideal choice for high-stress structural applications.

Corrosion and Machinability:

Typical average corrosion resistance of 7075 alloy, balanced with good machinability for precision applications.

Property Value (Typical) Notes
Tensile Strength 470–510 MPa Varies with bar diameter.
Yield Strength 400–420 MPa Higher than T73 temper.
Elongation 7–8% Improved ductility over T6.
Hardness (HBW) ~135 Lower than T6 (150 HBW).
Density 2.81 g/cm³ Lightweight for aerospace use.

Haomei Aluminum 7075 T73511 Extruded Bar Dimensional Tolerances

Manufactured with strict tolerances (typically around ±0.125 inches) to ensure consistency, which is crucial in aerospace, automotive, and defense industries.

Standards: Conforms to AMS 4167, ASTM B221, and BS L160.

7075 T73511 Extruded Bar

7075 T73511 Extruded Bar Applications

Industry Application
Aerospace 7075-T73511 extruded bars are used for aircraft frames and critical structural components such as fuselage parts (wing spars, landing gear), engine mounts, and hydraulic systems.
High-end Automotive 7075-T73511 extruded bars are ideal for parts requiring high stress resistance without increasing weight, such as high-stress components (suspension arms and drive shafts).
Defense 7075-T73511 extruded bars are suitable for military applications where material performance under stress is critical.
Industrial Tools 7075-T73511 extruded bars are used for mold bases and structural supports that require fatigue resistance.

7075 T73511 Extruded Bar Process Features

Manufactured through the extrusion process, suitable for producing complex cross-sectional profiles.

The T73511 temper indicates specific aging treatments after solid solution treatment, further relieving residual stress and enhancing stress corrosion resistance.

7075 T73511 Extruded Bar Core Advantages

Feature Description
High Strength The high strength of 7075 T73511 extruded bars allows them to perform excellently under high load and extreme conditions. Compared to ordinary steel, this aluminum alloy has much higher strength, making it widely used in aerospace, military, and high-strength structural applications. Its strength enables it to withstand large pressures and impact loads in critical applications, ensuring the stability and safety of the equipment.
Corrosion Resistance 7075 T73511 extruded bars exhibit excellent corrosion resistance, especially in high-stress corrosion cracking. Its good corrosion resistance makes it particularly suitable for use in marine and humid environments, such as ships, offshore platforms, and aircraft components. Even when exposed to moisture or salt fog environments for extended periods, the material maintains its mechanical properties and appearance, extending its service life.
Machinability 7075 T73511 extruded bars have a fine grain structure, which gives them excellent machinability in fine processes such as deep hole drilling and thread rolling. Compared to other aluminum alloys, the fine grain structure of 7075 T73511 reduces tool wear rates, improving machining efficiency and reducing production costs. This makes it an ideal material for high-precision machining and aerospace component production.

7075 T73511 Extruded Bar Limitations

  • Weldability: Due to reduced corrosion resistance after welding, it is not recommended for use.
  • Cost: Higher than 6061/2024 alloys, with its excellent performance being its advantage.

7075-T73511 extruded bars are key materials for industries where strength, corrosion resistance, and lightweight design are prioritized. Its specialized tempering process balances mechanical properties and environmental durability, making it an indispensable material in aerospace and defense applications.

7075 T73511 Extruded Bar Superior to Other Tempered Materials

Property 7075 T73511 Extruded Bar 7075 T6 Extruded Bar
Stress Corrosion Resistance Superior to T6, especially performing excellently in humid or saline environments. After over-aging treatment, it has higher stress corrosion resistance. Poorer, prone to stress corrosion, particularly in humid or saline environments.
Machinability Slightly lower strength but easier to machine, especially suitable for complex cutting or precision machining. Higher strength but harder to machine, with shorter tool life.
Dimensional Stability Good dimensional stability due to stress relief treatment, reducing warping during machining and maintaining high precision. Higher stress, which can lead to shape instability and warping after heat treatment.
Durability Exhibits longer durability in high humidity and marine environments, with lower corrosion risk. Relatively poor, lower durability, especially in high humidity or saline environments.

This comparison shows that the 7075 T73511 extruded bar performs better in specific applications, especially in terms of corrosion resistance, machinability, and dimensional stability. It is particularly suitable for marine or humid environment applications, whereas the T6 temper, although stronger, may face issues of corrosion and machining difficulty in these environments.

7075 T73511 Extruded Bar Production and Quality Control

Extrusion Process:

The bars are formed by forcing heated aluminum through a die, ensuring uniform cross-sectional profiles.

Heat Batch Consistency:

A "single heat batch required" option is typically offered to ensure that all parts in an order have the same material properties, which is crucial for precision engineering.

This combination of excellent strength, reliable fatigue resistance, and precise dimensional control makes the 7075-T73511 extruded bar an excellent choice for demanding structural applications where performance and weight reduction are critical.

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