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Expanded Metals vs. Perforated Metals – Costs, Benefits and Analysis

Architects and building contractors are often faced with many challenging decisions when choosing the right materials for a job. Different types of metals, materials and fabrication methods affect the performance of a structure or facility hugely, and structural sheet metal is no exception. While perforated metals and expanded metals are similar and have some overlapping applications, engineers understand that their capabilities are very different. Not only are perforated and expanded metals separated by their application industries, but by their fabrication methods and cost as well. Perforated metal seems to be the industry standard for architectural applications such as building facades, fences and partitions. Because perforated metals are punched and cut, dies can be designed to cut patterned shapes into sheet metal for a variety of purposes, both decorative and functional. The shape of metal perforations can determine a material’s usefulness for blocking microwaves, sound waves or light; perforated metals are used in all these industries. Next time you warm up some leftovers, take a look at your microwave door. See that filter in the glass? That’s a piece of perforated metal blocking microwaves from coming through the door.

Advantages of AC-DC ‘Brick’ Power Modules

Compact DC-DC converters have made their way into millions of electronic products and systems. The vast majority of these depend upon an AC-DC power supply (metal box or chassis-mount) to convert the AC into a DC voltage from which the converters can operate. In addition, regulations have mandated that these power supplies include Power Factor & Harmonic Correction (PFHC) to maximize the available power from the power grid. Add to this the need to be as small as possible and to operate with in harsh ambient temperatures and the designer is faced with a problem that is not easily solved.

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