On Tue, 11 Dec 2007 16:58:38 +0700, Bruce in Bangkok
wrote:


Rivets were the best fastener for ships until they started welding
plates (then a few Liberty ships sank before the subs got 'em.)

Brian W

Most of the high strength aluminum alloys are not weldable.

See Materials specification for 2024

Bruce-in-Bangkok

I marvel that people thinking about aluminum sheet invariably think of
2024. There are stronger materials now available, but weaker
materials are often useful. But one other factor mitigating against
welding is the top coat of soft aluminum which helps the sheet resist
corrosion.

Brian W