On 2006-01-21 16:29:42 +0100, Keith Hughes said:

Bob,

It isn't cheap ($390), but standard test kits are available. See below:

http://www.koslow.com/1499.html

Keith Hughes

Bob wrote:

I received two 7x15 stainless ports today. When I ordered them I was
assured they were 316 ss. So today I thought I would see if a magnet
would stick on one. The magnet stuck. When I called the supplier about
another issue I mentioned that my magnet was sticking to the 316 ss
port. I was told the polishing process was to blame and the 316 had
"picked up a slight magnetic" charge.

Is that true?

Are there simple NDT methods to determine if a stainless alloy is 304
or 316?
Bob

Hey man why dont you just get out there in your boat and see if she sinks.
I am not being sarcastic sail the damn thing thats what its for!