Which grade of ferritic stainless steel has the best resistance to oxidative corrosion?
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Stainless steel shafts are required for the motors in these devices, as they need to be capable of conducting magnetic fields; therefore, ordinary austenitic stainless steels cannot be used. I’ve heard that martensitic stainless steels also lack the necessary corrosion resistance, so what about ferritic stainless steels? Reaching the level of 304L is sufficient. Some sources state that 1Cr17’s resistance to dilute nitric acid is roughly on par with that of austenitic steels having the same chromium content. Are there any experiences you can share on this topic? Thank you!
I found some information about Taiyuan Iron and Steel, which states that the corrosion resistance of 410/430 grades is lower than that of 304; 443/436L grades have corrosion resistance comparable to that of 304, while 444 grade has corrosion resistance similar to that of 316. Students who have time can take a look at it. https://max.book118.com/html/2014/1221/10780495.shtm