7075-t6 Aluminum Round Bar

7075 T6 aluminum round bar is a high-performance cold-worked product made from one of the strongest aluminum alloys available. It is primarily composed of aluminum, with zinc as the major alloying element (typically 5.1-6.1%), along with magnesium (2.1-2.9%), copper (1.2-2.0%), and trace amounts of other elements such as chromium and titanium.

The "T6" designation indicates that the bar has undergone solution heat treatment and artificial aging to achieve peak strength, while the T651 variant includes a controlled stretching step to release internal stresses.

Compared to other states, the "T6" process increases strength and hardness, but it may reduce ductility.

7075-T6 Aluminum Round Bar Specifications

7075-T6 Aluminum Round Bar Corrosion Resistance

Due to its copper content, it is more susceptible to stress corrosion cracking compared to 6061. Outdoor/marine applications typically require protective coatings.

Corrosion Resistance of 7075-T6 Aluminum Round Bar

The corrosion resistance of 7075-T6 aluminum round bar is relatively low due to its high copper content. While the addition of copper improves the strength and hardness of the material, it also reduces the corrosion resistance of the aluminum alloy. Especially in humid or corrosive environments, the 7075-T6 aluminum round bar is prone to corrosion reactions. Therefore, its corrosion resistance should be carefully considered when selecting application scenarios.

Stress Corrosion Cracking (SCC) of 7075-T6 Aluminum Round Bar in Harsh Environments

7075-T6 aluminum round bar is susceptible to stress corrosion cracking (SCC) in harsh environments. Due to its high-strength properties, when exposed to high stress and corrosive media, such as in marine or industrial atmospheres, microscopic cracks may form within the alloy and gradually propagate. This phenomenon significantly reduces the material's service life and structural reliability.

Protection for 7075-T6 Aluminum Round Bar in Outdoor and Marine Environments

7075-T6 aluminum round bar typically requires additional protective coatings when used in outdoor or marine environments to enhance its corrosion resistance. Common protective measures include anodizing, electroplating, and applying epoxy resin or polyurethane coatings. These coatings not only effectively isolate the material from moisture and salt corrosion but also extend its service life, ensuring excellent mechanical properties in harsh environments.

Haomei 7075 t6 Aluminum Round Bar Stock Size List

7075-T6 Aluminum Round Bar Machining and Manufacturing

7075-T6 Aluminum Round Bar Applications

Due to its excellent strength-to-weight ratio, 7075-T6 aluminum round bar is typically used in demanding aerospace, high-performance automotive, and military applications. It is also suitable for precision-machined parts, such as gears, shafts, and structural components, where lightweight and high strength are crucial.

7075 t6 Aluminum Round Bar Limitations

• Higher cost compared to 6061.
• Not recommended for unprotected welded structures or highly corrosive environments.

7075 t6 Aluminum Round Bar vs 6061-T6 Comparison

• Strength: 7075-T6 is approximately 30% stronger.
• Corrosion resistance: 6061-T6 outperforms 7075.
• Machinability: Both are good, but 7075 requires stronger tools.

Key Considerations

• Avoid use in chloride-rich environments without protection.
• Complex machined parts may require stress-relief treatments to prevent cracking.

7075-T6 aluminum round bar is best suited for applications requiring a high strength-to-weight ratio, where cost and corrosion resistance are secondary considerations.

The material meets various industry standards (e.g., ASTM B211, AMS-QQ-A-225/9, AMS-4122), ensuring its reliability in critical applications.

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