In the Composites industry, Methyl Ethyl Ketone Peroxide (MEKP) is widely used as a catalyst for many resin system and processes. It's manufacturers require any piping for the transport of, or working vessels for the use of MEKP, to be made of either 304 or 316 Stainless Steel.
No one here could give me a definitive answer (mostly all composite nerds) as to why these two exclusively are specified. Being an old "heat treater" myself, and having been thrust into the composite world only a short time ago, the steel man still in me needs a better answer.
Anyone ? TIA Tony Gaither