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Extrusion Parts For Heat Sinks
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Our Stocked Heatsinks

We supply a large number of heatsinks to customers in a variety of industries.img_heatsink


Heat sinks are used to dissipate heat from hot surfaces by increasing the surface area that is in contact with cooling fluid or air.


From extruded heat sinks to bonded fin heatsinks, we can bring greater value in your heat sink solutions that you may be challenged to find with other suppliers.


Aluminum Extruded Heatsinks

Whether your extruded heatsink needs include a customized heat sink or one of our stocked heat sinks, we can provide a solution for you.



Our experienced personnel are prepared to help you develop a custom heat sink designed to meet your heat dissipation requirements, and be cost effective to manufacture.


Bonded Fin Heatsinks

Bonded fin heatsinks are generally used in forced air environments, bringing the ability to dissipate two-to-three times the heat load as an extruded heat sink of the same volume.


Stocked Heatsinks

We stock more than 225 heat sinks. With our efficiently managed heatsink production capacity, we can ship these heat sinks in 2-3 days in most instances.


We work hard to develop quality relationships with our customers, committing to do whatever we can to assure you have made the right choice. If you need a heatsink for your components,
contact Alexandria Industries to find one that fits your needs today.


An Extruded Heatsink uses the Extrusion manufacturing process where material is pushed through a die of the desired cross-section. A good video of the extrusion process can be found at this link. An Extruded Heatsink can have very complex cross-sections, and use materials that are brittle. The extrusion forms parts with an excellent surface finish, and are ideal for additional surface treatments such as Anodizing, or plating. Radian uses high thermal conductivity aluminum alloy A6063 200 W/(m-K) which most heatsink manufacturers do not use as it is "gummy" and difficult to work without without a good process recipe. A Extruded heatsink is suitable for high volume production as it has a relatively low NRE. The molds are typically made with an EDM wire machine, and the Tooling lead time is typically 4-6 weeks. The most cost effective when post machining is not required as additional CNC machining may relive the stress, causing misshape. This can be minimized by special thermal treatment to limit failures due to stress. Extruded Heatsinks offer both thin fins, and aspect ratios of ~8:1 which offers optimal heatsink performance.

Extruded Heatsink

Plate Fin Extruded Heatsink

Extruded HeatsinkOne of the most common type of Extruded Heatsink is the Platefin Extruded Heatsink which extracts heat by natural convection. An Extruded
Platefin Heatsink uses straight fins that run the entire length to maximize the surface area of the heat sink. The heatsink can have additional
machining to create a cross-cut which has a similar effe
ct to an elliptical fin heatsink.

Standard Extruded Heatsink

DC Plate extruded heatsinkThe following list of Standard Extruded Heatsinks are usually available within a few days. These heatsinks are extruded, cut,
and post machined then black anodized. As these standard extruded heatsinks have already been tooled, we can customize
by increasing the fin length of the heatsink.

In addition, an extruded heatsink can have a fan added to create an active cooled heatsink.

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Get In Touch or Get A Quote

+86-755-29981960 Moble, What's app, Wechat: +86 13902981860

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