Boat: Sold Sigma 33 OOD some time ago, will be chartering in Turkey really soon
Posts: 361
You cannot tell the difference easily. Looks and feels exactly the same.
A chemical analysis is an (expensive) possibility.
NDT companies could use a portable analyzer like a Texas Nuclear.
There is a fluid (ask your local inspection company)that will indicate the difference; I guess it looks for titanium which is added to 304 to make it 316 and seawater resistant.
...There is a fluid (ask your local inspection company)that will indicate the difference; I guess it looks for titanium (sic: molybdenum) which is added to 304 to make it 316 and seawater resistant.
A molybdenum chemical colour test kit will identify the presence of moly’ in 316 S/S, which is absent (or MUCH smaller %) in 304.
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Gord May "If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"
Looks like you can either buy test solution, or find a local welding shop that is sharp enough to have it, and ask them to run a fast test for a couple of bucks.