Quote:
Originally Posted by ZackaryMac
Just cheap stainless is somewhat magnetic. The good stuff isn't magnetic at all.
I worked on personal watercraft for years. When you dropped a real stainless nut/bolt/washer under the engine, where you can't fit your hand, it was a REAL pain to get out, as it couldn't be fished out with a magnet.
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The only stainless steels which are non-magnetic are the austenitic alloys, such as 304 &304L (low carbon), 308, 309, 316 & 316L .
Martensitic stainless steels, such as the 400 series, and CA6NM are not only not cheap, can be more expensive than the 300 series. Only reason the 300 series are used in marine applications (316) is the corrosion resistance to salts, though CA6NM is a universally better, stronger alloy (130Kpsi )