More info on ball valves and a request

[Bill Bloxham]

Here is the URL



mmmmmmbill@aol.com

[John R.]

Duh, where was I on that one, I had the same page bookmarked, visited it long ago, forgot about it and didn't even think to link to it. Good job Bill.

Did you note the differences between the standard shut off valves and the seacock valves not to mention the differences in each category? You can easily see why the general public and sales people in the marine business can easily confuse the products. Buyer beware comes to mind!

Here is the URL

[matt cawthorne]

Roger,
I do not have my materials book with me but I believe that Tobin bronze has a fair amount of zinc. It is often used for propeller shafts because it has a good strength characteristics.....unless you leave the zinc off.

matt

The best Bronze alloys for marine use are Silicon Bronze, Phosphor Bronze, Aluminum Bronze, Nickel Aluminum Bronze, and Tobin Bronze.

mcawthor@bellatlantic.net

[Tom]

Roger,
I do not have my materials book with me but I believe that Tobin bronze has a fair amount of zinc. It is often used for propeller shafts because it has a good strength characteristics.....unless you leave the zinc off.

matt

Tobin bronze is approximately 60% copper, 39% zinc and 1% tin according to Clark and Varney in "Physical Metallurgy for Engineers". It is also know as "naval brass".

The best Bronze alloys for marine use are Silicon Bronze, Phosphor Bronze, Aluminum Bronze, Nickel Aluminum Bronze, and Tobin Bronze.

TomCambria@mindspring.com