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What is Expanded Metal?

Expanded metal is a sheet of metal fabricated with an everyday sample of diamond-shaped openings. These openings reduce the load and cost of the sheet and provide air flow, making it a flexible answer for many applications. The most common metals used for expanded metal sheet embody steel, stainless metal, and aluminum, although it can also be made from titanium and copper.

How is Expanded Metal Made?

expanded metalExpanded sheet is made from a single sheet of metal that has been slit by a row of knives mounted on an industrial die reducing machine. The knives move back and forth in a uniform pattern, slicing the sheet in alternating cuts, while the sheet moves through the machine.

Because the knives cut, they concurrently push down on the newly lower sections, stretching them apart into "ribbons." The ribbons remain connected at the uncut sections, which grow to be the corners of open diamond shapes in an expanded mesh sheet. The scale, shape and positioning of the knives and the thickness of the metal sheet can be modified to create openings of different dimensions for a variety of applications.

Types of Expanded Metal

Expanded metal sheet comes in different profiles, including:

Standard Expanded Sheet: A completed product as it comes off the press after being minimize and expanded. Typically referred to as raised expanded metal, because of the alternating ridges formed by overlapping metal strips.

Flattened Expanded Sheet: A typical expanded sheet that is then cold rolled, leaving a flat, smooth surface. Flattened expanded sheet is about 5% lighter than commonplace expanded sheet.

Expanded Metal Grating: A heavy duty expanded sheet manufactured from carbon metal sheet or plate. Expanded metal grating has no joints or welds, as each sheet is a single piece of sturdy steel. Ideal for catwalk and platform applications.

A Versatile Product

Expanded sheet metal is a versatile and economical product that is durable, simple to work with, and provides low wind resistance. It offers one-piece construction that won’t unravel under normal circumstances, and will hold its shape for many years. The strands and bonds of the diamond-formed trusses add power and inflexibleity.

It's commonly used in a wide range of applications, akin to:

Machine guards

Catwalks, platforms and stair treads

Grating/flooring

Stair and balcony railing mesh

Window security

Vents

Conveyers

Cabinets

And much more

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