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A Comparison Between Aluminum Expanded Metal and Galvanized Expanded Metal

Aug. 14, 2023

Expanded metal is a versatile material known for its durability, strength, and open design. It finds applications in various industries, from architecture to industrial equipment. When considering expanded metal, two commonly used materials stand out: aluminum and galvanized steel. In this article, we will compare the properties, benefits, and applications of aluminum expanded metal and galvanized expanded metal.

Understanding Expanded Metal

Expanded metal is a sheet material that undergoes a process of cutting and stretching to create a pattern of interconnected strands and openings. This results in a mesh-like structure with excellent ventilation, drainage, and visibility properties. The choice between aluminum and galvanized steel depends on factors such as strength, corrosion resistance, and application requirements.

Advantages of Aluminum Expanded Metal

Aluminum Expanded Metal

Lightweight: Aluminum is significantly lighter than steel, making aluminum expanded metal a suitable choice for applications where weight is a concern, such as architectural facades or transportation equipment.

Corrosion Resistance: Aluminum naturally forms a protective oxide layer that resists corrosion. This makes aluminum expanded metal ideal for outdoor and marine applications.

Aesthetic Appeal: Aluminum has a natural silver finish that provides a clean and modern look, often preferred for architectural and decorative applications.

Non-Magnetic: Aluminum expanded metal is non-magnetic, making it suitable for environments where magnetic interference is a concern, such as medical facilities.

Benefits of Galvanized Expanded Metal

Strength: Galvanized steel is known for its strength and durability, making galvanized expanded metal suitable for applications that require robust support and load-bearing capacity.

Cost-Effective: Galvanization involves coating steel with a layer of zinc, which offers protection against corrosion. This cost-effective solution provides durability without the need for constant maintenance.

Versatility: Galvanized expanded metal is used in a wide range of applications, from security fencing to industrial platforms, due to its strength and structural integrity.

Heat Resistance: Galvanized steel can withstand high temperatures, making it suitable for applications exposed to heat or fire risks.

Comparison: Strength and Durability

Galvanized expanded metal has an edge in terms of strength and durability. It can withstand heavy loads and impacts, making it a popular choice for industrial and structural applications. On the other hand, while aluminum expanded metal is not as strong as galvanized steel, it is still strong enough for many applications and offers the advantage of being lightweight.

Comparison: Corrosion Resistance

One of the key distinctions between aluminum and galvanized steel is their corrosion resistance. Aluminum's natural oxide layer provides excellent protection against corrosion, especially in marine and outdoor environments. Galvanized steel is protected by a layer of zinc, which provides solid corrosion resistance but might require more maintenance over time, especially if the zinc coating gets compromised.

Application Considerations

Aluminum Expanded Metal Applications: Aluminum expanded metal is commonly used in architectural projects, interior design, decorative panels, sunscreens, and lightweight industrial applications. Its corrosion resistance and aesthetic appeal make it a preferred choice for projects that require both functionality and visual appeal.

Galvanized Expanded Metal Applications: Galvanized expanded metal is suitable for industrial platforms, walkways, security fencing, machine guards, and outdoor structures. Its strength and durability make it an excellent choice for heavy-duty applications where robust support is essential.


The choice between aluminum expanded metal and galvanized expanded metal depends on specific application requirements. Aluminum offers corrosion resistance, lightweight properties, and an appealing finish, making it perfect for architectural and decorative projects. Galvanized steel, with its strength and durability, excels in industrial and heavy-duty applications where structural integrity is vital. By understanding the strengths and benefits of both materials, individuals and businesses can make informed decisions to match their needs and achieve the desired results.

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