ThePipingMart Blog Grades 7204 Aluminum Alloy – Composition, Properties, and Uses

7204 Aluminum Alloy – Composition, Properties, and Uses

7204 Aluminum

Aluminum is a versatile metal that has entered numerous industries, including aerospace, automotive, and construction. One particular type of aluminium that stands out is the 7204 aluminium. This alloy is well-known for its remarkable properties that make it ideal for various applications. So, what makes 7204 aluminium a popular choice among manufacturers? Let’s dive into the details.

7204 Aluminum Composition

7204 aluminium is an aluminium-zinc-magnesium-copper alloy with high strength and excellent corrosion resistance. This alloy comprises 5% copper, 2.5% magnesium, 0.9% silicon, 0.5% vanadium, and 0.3% iron; the remaining percentage is aluminium. This alloy’s unique combination of elements enhances its mechanical properties, making it an excellent choice for applications that require high strength-to-weight ratio materials.

7204 Aluminum Physical Properties

7204 aluminium has a 2.82 g/cm³ density, making it less dense than steel. This alloy also has excellent thermal and electrical conductivity, making it an excellent choice for heat exchangers and electrical conduits. Additionally, 7204 aluminium has good workability and can be machined, welded, and easily formed.

7204 Aluminum Mechanical Properties

Due to its composition, 7204 aluminium has excellent strength properties, with a tensile strength of up to 72,000 psi and yield strength of up to 63,000 psi. This alloy also boasts an elongation value of up to 7%, which indicates its ability to resist deformation under stress. Moreover, 7204 aluminium has excellent fatigue resistance, ensuring it can withstand repeated loads without breaking or cracking.

7204 Aluminum Uses

7204 aluminium’s remarkable properties make it an excellent choice for various industrial applications. Some of the most common uses for 7204 aluminium include aerospace components, military vehicles, structural applications, and automotive parts such as wheels, suspension systems, and transmission. This alloy also produces high-speed trains as it can withstand high speeds and the stresses that come with them.

7204 Aluminum Hardness

7204 aluminium has a Brinell hardness value of around 160, which is harder than many other aluminium alloys. This high hardness ensures the alloy can resist wear and tear, making it an excellent choice for components with high friction levels.

7204 Aluminum Heat Treatment

7204 aluminium is a solution-treated alloy that can be heat-treated to enhance its properties further. Heat treatment involves heating the alloy to a specific temperature and then quenching it to cool rapidly. This process improves the alloy’s strength, flexibility, and fatigue resistance, making it ideal for high-performance applications.


7204 aluminium is an alloy that boasts numerous remarkable properties, making it an excellent choice for various applications. Its strength-to-weight ratio, excellent corrosion resistance, and heat treatability make it a popular choice in aerospace, automotive, and military industries. The uses of these alloys are vast and varied, and they have proven effective in various applications for many years. As technology advances, we will likely see more widespread use of 7204 aluminium and other high-performance alloys in more critical applications.

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