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Brass heat sinks

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I'm going to be machining some heat sinks and was going to use aluminum.
It appears copper is preferable to Aluminum.
How does brass compare to copper?
I can get tons of brass pieces to use and it is easier to machine than copper.
Would it be better than aluminum?
 

Wolfman29

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Brass is less than half as good, thermal conductivity-wise, as aluminum. Go with aluminum if you are not going to use copper.
 

Blord

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You want the best thermal conductivity for the heatsinks.
Brass is MUCH worse than aluminium.

Aluminum 247 W/m-K
Aluminum (6061) 171 W/m-K
Aluminum (6063) 193 W/m-K
Aluminum (7075-T6) 130 W/m-K
Brass (70Cu-30Zn) 115 W/m-K
Copper 398 W/m-K
Silver 428 W/m-K
 

billg519

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I have made several lasers in brass hosts. A couple of reds, a 500mW IR and a 1W IR, as well as brass hosts for green modules. The lasers all work well. I only used brass because I wanted the look of it. Most of my hosts are made from aluminum. The brass host will be quite heavy also. Make it a little bigger to allow for the less efficient heat transfer. Brass does polish up beautifully.
 




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