Common Aluminum Alloy Grades for Extended-Length Screws

Release time：2020-01-16 18:44 Browse：

Aluminum extended-length screws typically use the following alloy grades, selected based on application requirements and performance characteristics:

1. 6061 Aluminum Alloy

• A widely used aerospace-grade aluminum, offering good strength, corrosion resistance, and machinability. Commonly used in lightweight, medium-strength applications (e.g., camera mounts, sports equipment).

• Example: ST-50 general-purpose aluminum screws for GoPro accessories.

2. 6056 Aluminum (Alufast® Series)

• Designed for high corrosion resistance and thermal stability (up to 150°C), often used in automotive and aerospace magnesium alloy components.

• Weight: Only one-third of steel screws.

3. 6082 Aluminum Alloy

• High-strength alloy suitable for precision machinery (e.g., large-pitch threaded rods), with excellent wear and fatigue resistance.

4. 2000 Series (e.g., 2017, 2024)

• Aluminum-copper alloys with high strength after heat treatment, but lower corrosion resistance. Used in high-strength, low-corrosion environments.

5. 5000 Series (e.g., 5052)

• Aluminum-magnesium alloys with superior corrosion resistance, ideal for marine or chemically harsh environments (moderate strength).

6. 7000 Series (e.g., 7075)

• Ultra-high-strength aluminum-zinc-magnesium alloy (close to steel), but requires corrosion protection. Common in aerospace and military applications.

Selection Guide:

• Lightweight + Moderate Strength: 6061 or 5052.

• High Temperature/Corrosion Resistance: 6056 or 6082.

• Extreme Strength: 7075 (with anti-corrosion coatings).