Expanded metal is highly durable and versatile, and widely used across multiple industries, from construction and infrastructure to security, filtration, and manufacturing. Unlike perforated or woven metal products, expanded metal is produced by slitting and stretching a sheet of metal simultaneously to form a mesh-like pattern. This process not only enhances the strength-to-weight ratio of the material but also results in no waste, making it a resource-efficient choice. Expanded metal combines strength, flexibility, and visual appeal, making it ideal for functional and decorative applications.
Its structure allows for excellent load-bearing capabilities while permitting light, air, and sound passage, which is particularly beneficial in applications like fencing, walkways, catwalks, enclosures, and ventilation covers. The design possibilities are wide-ranging, from heavy-duty industrial platforms to lightweight architectural accents. At Curtis Steel & Aluminum Co., we believe that understanding the different types, benefits, and applications of expanded metal is essential for selecting the right specification to meet the requirements of any project.
The Manufacturing Process Of Expanded Metal
Expanded metal is created by slitting a solid metal sheet in a precise, predetermined pattern and then stretching it to expand the openings into a diamond-shaped mesh. This is done without welding or additional joining materials, preserving the integrity and strength of the original metal sheet. The key steps include:
• Slitting – Rows of staggered cuts are made in the sheet.
• Stretching – The sheet is pulled apart to create uniform openings.
• Flattening (Optional) – The mesh can be passed through rollers to flatten the surface for aesthetic or functional needs.
This process results in a rigid, non-raveling structure that maintains its shape under pressure, making it ideal for demanding applications.
Common Materials Used
Expanded metal can be manufactured from various base materials, depending on the intended use and environment:
• Carbon Steel – Common for structural and general industrial use.
• Aluminum – Lightweight and corrosion-resistant, ideal for architectural or marine applications.
• Stainless Steel – Resistant to rust and chemicals; suitable for food processing, medical, or exterior use.
• Copper and Brass – Chosen for decorative or conductive purposes.
Each metal offers distinct mechanical and visual properties, enabling customization based on the specific requirements of a project.
Types Of Expanded Metal
Expanded metal categorization depends on strand thickness, opening size, and surface treatment. Common types include:
• Standard (Raised) Expanded Metal – Features an angled surface for traction and rigidity.
• Flattened Expanded Metal – The mesh is passed through rollers to create a smooth surface.
• Micro-Expanded Metal – Fine mesh used for filters, screens, or speaker grilles.
• Decorative Expanded Metal – Custom shapes and designs for architectural features or furniture.
These types vary in terms of strength, transparency, and appearance, offering flexibility in both structural and design-oriented applications.
Applications Across Industries
The versatility of expanded metal is evident in its widespread use across numerous sectors:
• Construction and Architecture- Walkways, stair treads, catwalks, and mezzanine flooring, sunshades, facades, and architectural partitions
• Industrial and Manufacturing – Machine guards, safety enclosures, and protective panels, equipment ventilation grilles and air filters
• Transportation – Platforms and ramps for heavy vehicles and machinery, reinforcement mesh in concrete structures
• Security – Fencing for prisons, military facilities, and restricted zones, security screens and window protectors
• Commercial and Residential – Shelving systems, furniture design, and lighting fixtures, grills and decorative panels in interior spaces
The adaptability of expanded metal makes it an ideal choice for projects that require both functionality and aesthetic appeal.
Advantages Of Using Expanded Metal
Expanded metal offers several technical and economic advantages over other types of metal mesh or sheet products:
• High Strength-to-Weight Ratio
• Cost-Efficiency
• Non-Slip Surface
• Uninterrupted Structure
• Versatility
• Ventilation and Visibility
These features make expanded metal a reliable and efficient material solution for many uses.
Surface Treatments And Finishes
Depending on the application and environmental conditions, expanded metal can undergo various surface treatments to improve its durability and appearance:
• Galvanizing
• Powder Coating
• Anodizing (for Aluminum)
• Painting
Selecting the right finish is critical for ensuring longevity, especially in corrosive or high-impact environments.
Considerations When Selecting Expanded Metal
To ensure optimal performance, several factors should be evaluated when choosing expanded metal for a project:
• Material Type – Choose based on load requirements and environmental exposure.
• Mesh Size and Pattern – Determine visibility, airflow, and structural characteristics.
• Thickness and Strand Width – Influence strength and flexibility.
• Finish – Select based on indoor or outdoor usage and visual requirements.
• Compliance – Ensure the product meets industry-specific safety and regulatory standards.
Proper evaluation of these parameters ensures that the expanded metal product meets a given application’s functional and aesthetic goals.
Choose The Right Expanded Metal Provider
While the properties and applications of expanded metal are well-understood, any project’s success hinges on the product’s quality and precision in fabrication. A reputable supplier will provide tailored solutions, ensure consistent quality, and offer product selection and engineering support. This level of professionalism ensures that the expanded metal you invest in aligns perfectly with your design, safety, and performance requirements.
Call Curtis Steel & Aluminum Co. at 702.952.3000 for top-notch Expanded Metal products. You can also email us through this Online Form for more information.