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Aluminum Heat Sink

The use of aluminum heat sinks in critical product cooling systems can result in enormous benefits for industrial and commercial electronic device manufacturers. Improvements in aluminum extrusion profile technology make it possible to produce aluminum heat sinks for cooling mechanisms that call for a combination of greater strength and lighter weight. Extruded shapes generally have a greater tolerance than machined parts, and aluminum has a higher strength-to-weight ratio than steel, brass or copper.

Aluminum alloy is very malleable and, consequently, aluminum heat sink extrusion profiles can be created in a wide variety of unique designs. Aluminum is a good heat conductor and a good heat reflector, making it very useful in heat transfer applications and as a highly reflective heat shield. Aluminum alloy can be made in various tempers and is relatively low in cost. Through the process of smelting, refining and scrapping, aluminum alloy can also be pounded into foil, fins and sheets used in aluminum heat sinks.

While aluminum may provide less thermal conductivity than other more efficient cooling metals, such as copper, those metals are far more difficult to extrude or work into heat sink application profiles in comparison to aluminum. It is also considerably easier to create custom aluminum heat sink profile variations. When extruded in a fin, for example, profiles can easily be attached to a copper base, conducting a large amount of thermal energy to the lighter, less expensive aluminum alloy cooling fins.

Sapa Extrusions designs and manufactures aluminum heat sinks to serve the telecommunications, electrical, automotive, military, medical, and electronics industries, among others. The company's 30-plus years of experience in extruding heat sinks from ½" to 21" wide enables Sapa Extrusions to offer the most comprehensive range of heat sinks on the market, providing high fin densities with ratios up to 19:1 from facilities on the East and West coasts.

Backed by our North American Technical Center (NATC) thermal engineering team, Sapa Extrusions offers customers the most complete selection of cost-effective thermal products that have been designed with NATC's state-of-the-art software, testing and prototyping capabilities. For example, we developed a unique liquid cooling solution that combines aluminum extrusions with our Friction Stir Welding (FSW) technology. This makes Sapa Extrusions' specialized FSW air-cooled heat sinks more thermally efficient and higher quality than bonded or pressed fin products.

Sapa Extrusions is capable of providing the complete thermal management solution you need. We are the largest aluminum extruder in North America with 23 locations and more than 68 extrusion presses. In addition to extrusion, we also fabricate every product to meet your requirements. We cast our own material, offer at least 10 standard alloy choices, and can design virtually any custom alloy to suit your unique specifications.