Forged 6061-t versus 7075-t651

[lourenco]

Hi Guys , i have been working in a racing billet brake calipers to my racing team.

Now the design is read to be machined ,but i have some questions...

Why the most billet calipers are maden from aluminium forged 6061-t ????

I cant make forging process in my shop, so i guess, if i could use the 7075-t651 instead of forged 6061???

Why do they use 6061 so much ? Is it a cheapest material?

What is the hardness brineel diferences between 7075-t651 and forged 6061-t?

Its easy to find 7075-t651 in my country (Brazil) ,the 6061 i cant find, only importing....

Thanks guys

[Geof]

Here are a couple of links with information about 7075 and 6061. I think 6061 is used because it is cheaper than 7075 and is widely available in North America. I also think anything that can be made out of 6061 can probably be made from 7075 without any problems other than 7075 not being as corrosion resistant as 6061.

http://www.unitedaluminum.com/aaa.php

http://en.wikipedia.org/wiki/7075_aluminium_alloy

[lourenco]

i have a question...
what is the strongest aluminium ??? forged 6061-t or 7075-t651???


6061-t651=95 brinnel

7075-t651=150 brinnel

forged 6061=??????

How much brinnel hardness increase the forging process on 6061??

thanks