Do you need help? Here Us: +86-757-85577526 Mon-Fri: 9am-6pm
Certified Company ISO 9001:2021
Certified Company ISO 9001:14949


What Is The Difference Between 6061 And T6 Aluminum?
14 Jul, 2023

What Is The Difference Between 6061 And T6 Aluminum?

When it comes to aluminum, there are various grades and alloys available for different applications. Two commonly used aluminum alloys are 6061 and T6 aluminum. Understanding the difference between these alloys is crucial, especially if you work in industries like aerospace, automotive, or construction. We will explore the dissimilarities between 6061 and T6 aluminum in this article.

What Is 6061 Aluminum?

6061 aluminum is an alloy composed primarily of aluminum, magnesium, and silicon. It belongs to the 6xxx series of aluminum alloys, which are heat-treatable and exhibit excellent strength and corrosion resistance. 6061 aluminum is normally composed of 97.9% aluminum, 1% magnesium, 0.6% silicon, 0.28% copper, and traces of other components.

Aluminum Windows Factory

Aluminum Windows Factory

What Is T6 Aluminum?

T6 aluminum is not a specific alloy, but rather a heat treatment process applied to various aluminum alloys, including 6061. T6 refers to the solution heat-treated and artificially aged condition, which enhances the mechanical properties of the alloy. T6 aluminum obtains improved strength and hardness by heating it to a specified temperature, quenching it, and then aging it naturally or artificially.

Strength And Hardness

Strength and hardness are important factors to consider when comparing aluminum alloys like 6061 and T6 aluminum.

6061 Aluminum Strength And Hardness

6061 aluminum is known for its good strength, making it a popular choice for structural applications. It offers a balanced combination of strength and weight, making it suitable for various industries. Its composition includes magnesium and silicon, which contribute to its strength and allow it to bear severe loads and structural stresses.

T6 Aluminum Strength And Hardness

T6 aluminum, as mentioned earlier, undergoes a heat treatment process that significantly enhances its strength and hardness. The heat treatment process involves heating the aluminum alloy to a certain temperature, then rapidly cooling it by quenching and aging. This procedure alters the alloy's microstructure, resulting in better mechanical characteristics.

Aluminum Doors

Aluminum Doors

Formability And Weldability

Formability and weldability are essential considerations for aluminum alloys, as they determine their ease of shaping and joining.

6061 aluminum offers good formability, allowing it to be shaped and fabricated into various forms and structures. It can easily bend, roll, and extrude without significant cracking or deformation. Because of its formability, it is suitable for applications requiring complicated forms and patterns.

The heat treatment process involved in producing T6 aluminum can affect its formability. The increased strength and hardness of T6 aluminum may lead to reduced formability compared to 6061 aluminum. Without appropriate equipment or skills, it may become increasingly difficult to bend or shape T6 aluminum.

Corrosion Resistance

Both 6061 and T6 aluminum exhibit good corrosion resistance.

6061 aluminum contains magnesium and silicon, which contribute to its corrosion resistance properties. It can tolerate exposure to atmospheric conditions like moisture and oxygen without corroding significantly. This corrosion resistance makes it suitable for outdoor applications and environments with moderate levels of corrosive substances.

T6 aluminum retains the corrosion resistance properties of the base alloy it is derived from, such as 6061. The heat treatment process does not significantly alter its corrosion resistance characteristics. It still provides adequate protection against air corrosion and general moisture and oxygen exposure.

LED Aluminum Profile

LED Aluminum Profile

Cost Considerations

When comparing the cost of 6061 and T6 aluminum, several factors come into play.

6061 aluminum is generally more affordable compared to T6 aluminum. The additional heat treatment process involved in producing T6 aluminum adds to its manufacturing costs. The complexity and precision required in heat treatment contribute to the increased cost. The pricing difference between these two aluminum varieties will be influenced by the exact application requirements and required strength levels.

Besides, it's important to evaluate the project's needs and budget constraints to determine the most cost-effective option while considering the required mechanical properties and performance.


6061 aluminum is an alloy with good strength, formability, and weldability, while T6 aluminum refers to the heat-treated condition of various aluminum alloys, including 6061. If you are looking for aluminum products, XIANGZHEN can help you. We are devoted to providing high-quality aluminum products. Such as aluminum profiles, aluminum doors, aluminum windows, etc. Contact us and get a quotation today!

Leave a comment