On Tue, 22 Apr 2008 23:47:26 -0400, Marty wrote:

William Longyard wrote:
What type of bronze is best for underwater use? Aluminum bronze, silicon
bronze, other?

Salt or Fresh, Tropical, arctic.....? What use, mechanical load,
vibration, stress, compression, tension, torsion...etc?

I think the only real issue is corrosion resistance. As for strength
some bronze is stronger than mild steel. As much as 100 000 PSI, if I
recall correctly v. 30 000 for cheap steel. Don't you usually just buy
what is available? Trust them to use something suitable? I would bet
the stainless used for props is much stronger than coathanger steel.
They do make guns from stainless, and and the stuff used is as strong
as the chrome moly used forever. Stronger than the bronze used for
props if you go by the thinner sections used. I think just about
anything will be OK but I don't know for sure. Get US made stuff, I
wouldn't trust Chinese products.

Casady