Information on Aluminium Alloys

Warning: I don't know anything about this sort of thing.

My guess is that it is either 6005 or 6005A

go here

6005 is the type of aluminium alloy. AAA, I am not very sure but it should refer to the surface treatment , "Anodising type." Could be hard anodising. Someone who knows about American standards should be able to help.

you could try eFunda here:

http://www.efunda.com/materials/alloys/aluminum/show_aluminum.cfm?ID=AA_6005&show_prop=all&Page_Title=AA%206005

or matweb here:

http://www.matweb.com/search/DataSheet.aspx?MatGUID=2f1679ed1ada446c8f329a76c72a701a

I haven't got this grade in any of my reference books, but it appears that AA just means Aluminium Alloy. The extra A could be Anodised as Angelo suggested, heatsinks are usually anodised aren't they?

Drew

If you have no restriction as to what material to use in place, you can go copper, it has around 10 times the thermal conductivity as the aluminium.

Just check the later microprocessors heatsinks.

Yahlasit

Hi C.RAJ KUMAR,

Sorry but I missed the use of the Al alloy (heat sink).

Following is the thermal conductivity (at 25ºC/77ºF): 180-190 W/m ·°C

The alloy you have now has a good resistance to atmospheric corrosion, is weldable and light weight. There are other materials, as copper with much better thermal conductivity, but higher density (look at cost per unit weight).

I was in a factory which made "heat pipes" as heat sinks for satellite applications and obviously the weight was critical, so we used Al alloys.

The final solution depends on you, balancing the critical requirements of the application and the economical restraints.

Kind regards and good luck

http://www.matweb.com/index.aspx

this site will give you all the info on alloys.

Ronnie.