Expanded Metal Sizes: A Comprehensive Guide to Types, Processes, and Customization

Expanded metal is a versatile material widely used in industries ranging from construction to manufacturing. It is created by slitting and stretching a sheet of metal to create diamond-shaped openings, allowing for air, light, liquid, and sound passage. In this article, we will explore the factors that determine expanded metal sizes, the process involved in its production, and how you can customize it to suit your specific application needs.

What Determines Expanded Metal Sizes?

The size and shape of expanded metal are determined by several key factors, including:

Sheet Thickness: The thickness of the metal sheet is one of the most significant factors in determining the size of the diamond-shaped openings in expanded metal. Thicker sheets produce stronger, more rigid, expanded metal but may result in smaller openings.
Opening Size: The openings in expanded metal are usually expressed in terms of the long and short axes of the diamond shape. The “long way” of the diamond refers to the longer side of the opening, while the “short way” is the smaller side. The opening size can vary depending on the machine settings and the type of expanded metal required.
Strand Size: The strand size is the width of the metal bars that connect the diamond openings. The strand size can be adjusted to suit different load-bearing requirements and desired aesthetic effects. A larger strand size results in stronger expanded metal with reduced open area, while a smaller strand size provides greater airflow and visibility but with lower strength.
Machine Type: The machine used to produce expanded metal also plays a role in determining the final product’s size and pattern. Different machines allow for variations in the opening size, strand width, and overall flexibility of the expanded metal sheets.

How Is Expanded Metal Made?

The production of expanded metal involves several steps. The process begins with a flat sheet of metal, typically made of steel, aluminum, or stainless steel, which is fed into an expanding machine. Here’s an overview of how the material is transformed into expanded metal:

Slitting: The first step involves slitting the metal sheet into strips. These strips are cut in such a way that they form diamond-shaped openings when stretched.
Stretching: The slitted sheet is then passed through the expanding machine, which stretches the metal in one direction to create the characteristic diamond-shaped openings. The stretching process also strengthens the material, providing better load-bearing capacity.
Flattening (if required): In some cases, the expanded metal is flattened to create a smooth surface. Flattening is typically done using a rolling mill, which compresses the metal without distorting the pattern.
Cutting and Finishing: After the metal has been expanded and flattened (if necessary), it is cut to the required size for shipment or further processing. The final product is a sheet with uniform openings that can be used in various applications, such as flooring, grating, or fencing.

To learn more about the step-by-step process of how expanded metal is made, check out our detailed guide here: How Expanded Metal is Made.

Types of Expanded Metal

There are different types of expanded metal, each suitable for various applications. The two most common types are:

Type I – Raised (Standard): In this type, the diamond strands are raised, creating a more pronounced texture. This is often used for applications requiring a slip-resistant surface, such as catwalks, machine platforms, and stair treads.
Type II – Flattened (Smooth): The strands in flattened expanded metal are compressed, giving it a smooth surface. Flattened expanded metal is often used for decorative applications or where a smooth, level surface is needed.

Customizing Expanded Metal Sizes

One of the key advantages of expanded metal is its flexibility in terms of size, material, and pattern. Depending on your specific needs, expanded metal can be customized in a variety of ways:

Opening Size: The size of the openings can be adjusted to meet the requirements of different applications. For example, security fencing may require smaller openings to prevent larger animals from passing through, while walkways or flooring may require larger openings to allow for better drainage and airflow.
Strand Size: The strand size can be modified to meet the strength and durability needs of the application. Stronger strand sizes are ideal for heavy-duty uses, such as construction or industrial flooring, while lighter strands are suitable for decorative or low-load applications.
Materials: Expanded metal is available in a range of materials, including steel, stainless steel, aluminum, and coated metals. The choice of material will depend on factors such as environmental exposure, strength requirements, and aesthetic preferences.
Thickness: The thickness of the metal sheet can be selected to match the required strength and load-bearing capacity. Thicker metal sheets provide greater strength and durability, while thinner sheets are more lightweight and easier to handle.

Applications of Expanded Metal

Expanded metal is widely used in many industries due to its versatility. Here are some of the most common applications:

Security Fencing: Expanded metal is often used for high-security applications, such as prison fencing, perimeter enclosures, and barriers in industrial facilities. The strength and rigidity of expanded metal make it an ideal choice for creating secure enclosures.
Walkways and Platforms: Raised expanded metal is commonly used for catwalks, machine platforms, and stair treads due to its slip-resistant properties and strength.
Grating: Expanded metal grating is used for applications requiring a strong, open flooring system, such as elevated walkways, machine guards, and drainage covers.
Architectural and Decorative Use: Flattened expanded metal is often used in architectural designs and for decorative elements. It provides an aesthetically pleasing appearance while still offering durability and functionality.
Shelving and Supports: Expanded metal is used in shelving, rack systems, and as support material for various industrial applications.

Pricing and Availability of Expanded Metal

The cost of expanded metal will depend on several factors, including the material used, opening size, strand size, and thickness. Aluminum expanded metal is generally more expensive than steel, and the pricing may vary based on the level of customization required. While it is often more economical than perforated metal, expanded metal still offers excellent value due to its strength-to-weight ratio and minimal material wastage during production.

At RKM, we offer a range of high-quality expanded metal mesh machines that can produce customized expanded metal to meet your specific needs. Our machines are designed to offer high precision and efficiency, ensuring that you get the perfect product for your applications.

Why Choose RKM for Your Expanded Metal Needs?

At RKM, we specialize in manufacturing high-performance expanded metal mesh machines. Whether you need raised or flattened expanded metal, we have the right equipment for your production needs. Our machines are built with advanced technology and designed to deliver exceptional performance. With customization options for material, opening size, strand size, and thickness, our expanded metal mesh machines offer the flexibility to meet any industrial, architectural, or decorative requirement.

For more information about our machines and to request a quote, please visit our website: RKM Expanded Metal Mesh Machine.

In conclusion, expanded metal is a versatile and durable material used across various industries. Whether you’re looking for security fencing, industrial grating, or decorative applications, RKM’s expanded metal mesh machines can help you produce high-quality expanded metal tailored to your specific needs. With customizable sizes, materials, and patterns, our machines ensure efficiency, reliability, and long-lasting performance.