I found this when I googled 304 stainless steel.
"Stainless 316 contains more nickel than stainless 304, while 304 contains more chromium than 316. ... Both steels are durable and provide excellent resistance to corrosion and rust. 304 stainless steel is the most versatile and widely used austenitic stainless steel in the world, due to its corrosion resistance.Jul 28, 2017"
"If you want to make an apple pie from scratch, you must first create the universe." -Carl Sagan