316 stainless steel has good corrosion resistance in normal temperature and low concentration salt water, but pitting corrosion, crevice corrosion or stress corrosion may still occur in high concentration, high temperature or long-term immersion salt water environment.

The performance difference between SUS316L and SUS321 is essentially corrosion resistance and high temperature stability. The former is irreplaceable in medium temperature and high corrosion environments, while the latter is the first choice for high temperature thermal cycle scenarios.

SS321 stainless steel ，SS316 stainless steel ，SS321 vs SS316

18/10 stainless steel contains 18% chromium and 10% nickel. This high nickel content makes it more corrosion resistant and more resistant to corrosion than 304 stainless steel.

1.4301 stainless steel is one of the most common stainless steel grades, also known as 304 stainless steel.

The main components of 304 stainless steel include 18% chromium and 8% nickel. This high chromium and high nickel composition makes it have excellent corrosion resistance. 430 stainless steel mainly contains more than 16% chromium and no nickel, which makes it less corrosion resistant.