`US Navy superaustenitic submarine material evaluation`

Brief reference. Navy considered replacing HY-100 with super-austenitic stainless (zero ferrite, non-magnetic, no acoustic signature) ten or fifteen years prior. Rejected as overpriced and unnecessary given the threat environment.

If you go to a low-carbon variety, we're going to talk about that in a little bit. This improves the weldability and the corrosion resistance. When you go even higher in molybdenum and nickel and add some nitrogen for corrosion resistance, you get to the super-austenitic stainless steels. 10 or 15 years ago the U.S. Navy was thinking about getting rid of HY100 and building a super-austenitic stainless steel submarine, because it's non-magnetic. It doesn't have a magnetic signature that someone can find in the ocean. I think they've gone away from that, because they realized those terrorists probably are not going to be using superconductors in the sky. And it's also sort of pricey.