7075 aluminum is a high-strength alloy widely used in various industries, particularly in aerospace and military applications. Its unique properties, including excellent fatigue resistance and lightweight characteristics, make it a critical material in modern engineering. Understanding the production and applications of 7075 aluminum in China is essential for professionals seeking to leverage its advantages in their projects.

This guide will delve into the specifics of 7075 aluminum, exploring its composition, manufacturing processes, and the factors influencing its quality. Readers will gain insights into the competitive landscape of the aluminum industry in China, including key players and market trends.

Additionally, the guide will cover the various applications of 7075 aluminum, highlighting its significance in sectors such as aviation, automotive, and sports equipment. By the end of this guide, readers will have a comprehensive understanding of 7075 aluminum’s role in China and its impact on global markets.

A Comprehensive Guide to 7075 Aluminum

7075 aluminum is a high-strength alloy primarily composed of zinc, making it one of the most robust aluminum alloys available. It is widely used in aerospace, automotive, and military applications due to its excellent mechanical properties and resistance to stress corrosion. This guide will delve into the technical features, types, and applications of 7075 aluminum, providing insights into its advantages and limitations.

Technical Features of 7075 Aluminum

7075 aluminum is known for its exceptional strength-to-weight ratio, making it a preferred choice in industries where weight savings are crucial. Below is a comparison table highlighting the key technical features of 7075 aluminum:

Property	Value
Tensile Strength (Ultimate)	572 MPa (83,000 psi)
Yield Strength	503 MPa (73,000 psi)
Elongation at Break	11%
Modulus of Elasticity	71 GPa (10.3 x 10^6 psi)
Hardness (Brinell)	150 HB
Density	2.81 g/cm³
Melting Point	990°F – 1175°F (532°C – 635°C)

These properties make 7075 aluminum suitable for high-stress applications, particularly in the aerospace sector.

Types of 7075 Aluminum

7075 aluminum is available in various tempers, each offering different mechanical properties and applications. The following table summarizes the different types of 7075 aluminum and their characteristics:

Temper	Description	Applications
T6	Solution heat-treated and artificially aged.	Aircraft structures, high-stress parts.
T651	Solution heat-treated, stress-relieved by stretching, artificially aged.	Aerospace components, military equipment.
T73	Solution heat-treated, artificially overaged for stress corrosion resistance.	Marine applications, high-stress parts.
T76	Solution heat-treated, artificially overaged for good exfoliation resistance.	Aerospace applications, structural parts.
O	Annealed condition, offering maximum ductility.	Forming and machining applications.

Each temper serves specific needs, allowing manufacturers to select the right type based on the application requirements.

Applications of 7075 Aluminum

7075 aluminum is extensively used in various industries due to its high strength and lightweight properties. Some common applications include:
– Aerospace: Used in aircraft structures, including wings and fuselage components, due to its high strength-to-weight ratio.
– Automotive: Employed in high-performance vehicles for parts that require lightweight materials without compromising strength.
– Military: Utilized in military aircraft and vehicles, where durability and strength are paramount.
– Sports Equipment: Found in high-end bicycles, ski poles, and climbing gear, where weight savings are critical.

Key Suppliers of 7075 Aluminum

Several manufacturers specialize in producing 7075 aluminum products. Notable suppliers include:
– FONNOV Aluminium: www.fonnovaluminium.com offers a wide range of 7075 aluminum extrusions and custom profiles.
– Huaxiao Metal: www.huaxiaometal.com provides high-quality 7075 aluminum bars and rods, ensuring strict quality control.
– Sasa Aluminum: www.sasaaluminum.com specializes in aluminum sheets and plates, including 7075 variants.
– Linkun Steel Pipe: www.lksteelpipe.com offers various aluminum alloys, including 7075, for structural applications.
– Royal Group: www.royalsteelgroup.com provides aluminum tubes and profiles, focusing on industrial applications.

Advantages and Limitations of 7075 Aluminum

Advantages

High Strength: 7075 aluminum is one of the strongest aluminum alloys, making it ideal for demanding applications.
Lightweight: Its low density contributes to weight savings in various applications, particularly in aerospace and automotive sectors.
Good Corrosion Resistance: While not as corrosion-resistant as some other alloys, it still offers better resistance than 2000 series alloys.

Limitations

Poor Weldability: 7075 aluminum is challenging to weld, which can limit its use in certain applications.
Cost: The high strength and performance come at a premium price, making it less economical for some applications.
Stress Corrosion Cracking: It is susceptible to stress corrosion cracking, particularly in high-stress environments.

Conclusion

7075 aluminum is a versatile and high-performance alloy that plays a crucial role in various industries, particularly aerospace and automotive. Its exceptional strength, lightweight nature, and good corrosion resistance make it a preferred choice for high-stress applications. However, its limitations, such as poor weldability and higher cost, should be considered when selecting materials for specific projects.

FAQs

1. What is 7075 aluminum used for?
7075 aluminum is primarily used in aerospace, automotive, and military applications due to its high strength and lightweight properties.

2. How does 7075 aluminum compare to other aluminum alloys?
7075 aluminum offers superior strength compared to other aluminum alloys, particularly 2024 and 6061, making it suitable for high-stress applications.

3. Can 7075 aluminum be welded?
Welding 7075 aluminum is challenging due to its susceptibility to cracking. It is often recommended to use alternative joining methods.

4. What are the different tempers of 7075 aluminum?
Common tempers include T6, T651, T73, and T76, each offering different mechanical properties and applications.

5. Where can I buy 7075 aluminum?
7075 aluminum can be purchased from various suppliers, including FONNOV Aluminium, Huaxiao Metal, Sasa Aluminum, Linkun Steel Pipe, and Royal Group.