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Copper Expanded Metal

A reliable source for Copper Expanded Metal information and leading Copper Expanded Metal Companies & Manufacturers.

While many different metals are suitable for metal expansion, copper is chosen particularly for this process when being employed by certain companies, such as those in the electrical, heating and cooling, refrigeration, construction, ornamental and architectural industries. Read More…

Copper Expanded Metal Copper expanded metal is a sheet or plate composed of copper or its alloys, such as brass or bronze. It has been slit and stretched simultaneously to create an open framework of solid construction.
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Leading Manufacturers

Tamaqua, PA  |  888-218-2260

Our expanded metal is ideal for a wide range of applications and our teams will work with you every step of the way to guarantee your satisfaction. Our goal is to exceed your expectations and we take pride in providing our customers with outstanding services.

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Remaly Manufacturing Company, Inc. $$$

Carbondale, PA  |  800-225-7373

At Hendrick Manufacturing, we are metal perforators with capabilities to take you from design to performing secondary fabrication operations.

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Hendrick Manufacturing Company $$$

Oakwood Village, OH  |  800-492-7304

We have been expanding metal horizons since 1978, manufacturing a line of expanded metals and gratings. As the leader in North America, AMICO offers regular, flattened and expanded metal grating. Our expanded metal is used for metal fences, machine and heater guards, enclosures, supports and more.

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Metals, Inc. $$$

Rogers, MN  |  888-744-6868

Midwest Steel & Aluminum is partnered with the best metal suppliers worldwide to offer our customers steel cut to size and delivered on time. We are committed to manufacturing high-quality products while pushing ourselves to be even better. We are ISO 9001:2015 certified.

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Midwest Steel 	& Aluminum $$$
placeholder image Remaly Manufacturing Company, Inc. Hendrick Manufacturing Company Metals, Inc. Midwest Steel 	& Aluminum

A non-ferrous transition material, copper has excellent thermal and electrical conductivity combined with good corrosion resistance and strength. The expanding metals process improves the strength, rigidity and weight to strength ratio of a metal such as copper. Expanded metal sheets made of copper and its alloys are therefore suitable as heat sinks, radiators and enclosures. The reddish brown appearance of copper makes it a popular choice for decorative mesh as well as decorative ornaments, filters, walkways and grates.

Copper expanded metal allows for varying amounts of light, water, air, sound and debris to pass through it, improving visibility, safety and ventilation. While other manufacturing processes can achieve these same benefits, metal expansion is more cost effective than punching and perforation techniques because there is no material wasted as there is with these other techniques. The solid construction also means that there are no seams, welds or joints to wear and work loose over time, making copper expanded metal a more stable and long lasting alternative to the use of welders or fasteners.

Copper expansion begins with flat plates or sheets of the metal that are produced by roll forming the raw mineral. These stock shapes are then fed into an automated expansion machine. It is important to consider that the thickness will be significantly reduced and the length increased in order to select the most appropriate sheet metal for a given application. The process of expansion can increase the length of a sheet of copper up to ten times that of the original.

In the expansion machine, a series of knife-like dies slit the metal hundreds and sometimes thousands of times in an alternating offset pattern. At the same time, the sheet is being drawn through rollers. This heat and pressing technique stretches the metal causing the pre-cut holes to swell. The once solid sheet of metal is then extruded from the machine as an open latticework of solid construction. While it is possible to expand metal manually, computerized equipment shows significant gains on speed and precision.

Most often the apertures are diamond shaped, although hexagonal and custom shaped openings are also available with the use of different dies. Not only the shape, but the percentage of open area should be carefully considered with regards to the finished product or any secondary operations. Malleable and ductile, copper is easily formed and processed both before and after metal expansion.

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