Marine aluminum recommendation?

[rwthomas1]

Hello All,
I am looking to have a set of custom engine pulleys made. The machinist would like to know what type of aluminum would be best for a marine environment. He has suggested 7075 T7 or 7050 but he's not a marine guy so he suggested I ask around to make sure I get what I need. I know someone in the Ericson family will have some input on this one. Thanks in advance! RT

 

[Martin King]

Rob,
I'd go with T6 6061. It machines really nice, and can be hard
anodized or chromed. Just my 2 cents.

Martin

 

[newpbs]

6061

I recall making a couple of small parts for my Dad's Irwin years ago. I used 6061 aluminum, mostly because I has access to some and it machines well. It held up well for 15 years in fresh water use. The boat is still in service although my dad sold it 3 years ago.
Good Luck