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Expanded metal is an excellent option to consider when you want more structural stability than wire mesh but still want to allow some air flow or water drainage. This makes it a right choice for fences, grates, and walkways. Expanded metal medium weight, average durability, and in many respects can be considered a good middle ground between the other two options. One downside is that it may have sharp edges, which need to be sanded, polished, or coated to prevent injury. 
One of the first essential steps of any industrial project is to consider what material works best for your needs. While sheet metal may be the right choice when building a car or aircraft, you will not want to use it in place of wire mesh when making a screen or cage where airflow is essential. When choosing between wire mesh, expanded metal, and sheet metal, it helps to know what things each of them does best. 

Expanded Metal Mesh is a versatile and economical product made from a high-quality metal plate. We can make the expanded metal in many sizes, openings, and material types, can be in coils and sheets. There are many materials for your choice, such as carbon steel, galvanized steel aluminum, stainless steel, copper or other metal alloy plate.

The strands and bonds of the diamonds in the sheet add strength and rigidity. Since no metal is lost in the expanding process, expanded metal is a cost-effective alternative to perforated metal and woven wire mesh at some usage.
The expand metal mesh sheet is uniformly slit and stretched, forming diamond-shaped openings in the sheet that allow for the passage of water, oil, light, air, heat, and sound.