6063 vs. 6082

Attribute	6063	6082
Composition	Aluminum, magnesium, silicon	Aluminum, magnesium, silicon
Tensile Strength	215 MPa	310 MPa
Yield Strength	160 MPa	275 MPa
Hardness (Brinell)	73	95
Applications	Architectural applications, window frames, doors	Aerospace components, structural components

Introduction

Aluminum alloys are widely used in various industries due to their lightweight, corrosion resistance, and high strength-to-weight ratio. Two popular aluminum alloys, 6063 and 6082, are often compared for their different attributes and applications. In this article, we will explore the key differences between these two alloys to help you make an informed decision when choosing the right material for your project.

Composition

6063 and 6082 aluminum alloys have slightly different compositions, which result in distinct properties. 6063 aluminum alloy is composed of aluminum, magnesium, and silicon, while 6082 aluminum alloy contains aluminum, magnesium, and silicon as well, but with higher magnesium content. The higher magnesium content in 6082 provides better strength and hardness compared to 6063, making it more suitable for structural applications.

Strength and Hardness

One of the key differences between 6063 and 6082 aluminum alloys is their strength and hardness. 6082 aluminum alloy has higher tensile strength and yield strength compared to 6063, making it a preferred choice for applications that require high strength and durability. The higher magnesium content in 6082 contributes to its superior strength and hardness properties, making it ideal for structural components in aerospace and automotive industries.

Corrosion Resistance

Both 6063 and 6082 aluminum alloys exhibit excellent corrosion resistance due to the presence of magnesium and silicon in their composition. However, 6063 is more susceptible to corrosion in harsh environments compared to 6082. The higher magnesium content in 6082 provides better resistance to corrosion, making it a suitable choice for marine and offshore applications where exposure to saltwater is a concern.

Machinability

When it comes to machinability, 6063 aluminum alloy is easier to machine compared to 6082. The lower magnesium content in 6063 results in better machinability and formability, making it a preferred choice for applications that require intricate shapes and designs. On the other hand, 6082 aluminum alloy may require special machining techniques due to its higher hardness and strength properties.

Weldability

Both 6063 and 6082 aluminum alloys are weldable using conventional welding techniques such as TIG and MIG welding. However, 6063 is considered more weldable compared to 6082 due to its lower magnesium content. The higher magnesium content in 6082 can lead to weld cracking and reduced weld strength if proper welding procedures are not followed. It is important to consult with a welding expert when welding 6082 aluminum alloy to ensure proper weld quality.

Applications

6063 and 6082 aluminum alloys are used in a wide range of applications across various industries. 6063 is commonly used for architectural and decorative applications such as window frames, door frames, and curtain walls due to its excellent formability and finish. On the other hand, 6082 is preferred for structural components in aerospace, automotive, and marine industries where high strength and durability are required.

Conclusion

In conclusion, 6063 and 6082 aluminum alloys have distinct attributes that make them suitable for different applications. While 6063 offers better machinability and formability, 6082 provides superior strength and hardness properties. When choosing between these two alloys, it is important to consider the specific requirements of your project and select the alloy that best meets your needs. Consulting with a materials expert can help you make an informed decision and ensure the success of your project.