Marine grade aluminum is a broad term. There is more than one alloy that is referred to as marine grade. If your friend can get you 6061-T6 or 6061-T6511 that will be fine. If all you know is that it is marine grade and you don't know what the alloy is don't use it. It will likely be an alloy that has higher corrosion resistance than 6061, but is not as strong. For the most part, stronger alloys of aluminum have lower corrosion resistance. When building boats you are usually more interrested in corrosion resistance.
As far as T5, in all my years I have never seen T5. I worked at a machine shop a long time ago and started my aluminum parts there while I was getting the material and the use of the shop for free. My boss at the time told me that T6 was essentially the same as T5, but a whole lot more common. Maybe T5 was common in the 70s and T6 wasn't. This has nothing to do with KRs, but I sell electronics for ships for my day job and I was at a shipyard near Seattle last month. They were very busy rebuilding some ships that were only a few years old. Seems that Alcoa found out that there was a problem with a bunch of the marine aluminum they made a few years ago and all of it was corroding. They wound up paying several shipyards a bunch of warranty money to replace it. I imagine that it gets pretty expensive to replace all the aluminum on an aluminum ship! Brian Kraut Engineering Alternatives, Inc. www.engalt.com -----Original Message----- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of Ray Fuenzalida Sent: Friday, April 02, 2004 2:26 PM To: KRnet Subject: Re: KR> T5 aluminum Question for the group. What about marine grade aluminum? I have a friend in the aluminum boat building business. I can get virtually any size/configuration metal from him. Is it acceptable? How is T-5 or T-6 different? Are we just talking thicknesses? Some kind of core inner strength? Ray A long **^&%$^*& way from being finished. Mark Langford <n5...@hiwaay.net> wrote: Steven Phillabaum wrote: > On the aluminum list posted I stated T-5 for hinge and horns. Wicks and ACS does not carry them. My father gave me a name of a supplier.( can't locate name at this time) I called and spoke to him. He does not have T5. OK what to do? MARK, what did you use if you did not find T5. I will need to make the horns but using Dr. Deans method of hinges.< Just use T-6, it's stronger anyway. Not sure why anybody would specify T5, when T6 is more plentiful and stronger in utimate and yield anyway. Are you sure you're not thinking of T651? That's pretty much the same thing as T6, as I recall. I used T6, and most other folks probably did too, whether they knew it or not. Mark Langford, Huntsville, AL N56ML "at" hiwaay.net see KR2S project at http://home.hiwaay.net/~langford _______________________________________ to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html --------------------------------- Do you Yahoo!? Yahoo! Small Business $15K Web Design Giveaway - Enter today _______________________________________ to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
