stainless steel also known as inox steel or inox.if you ask what is the best stainless steel ,we should know some knowledge of stainless steel first. Different stainless steel grade means different mainly chemical composition such as chromium and nickel. Stainless steels do not suffer uniform corrosion, like carbon steel, when exposed to wet environments. Unprotected carbon steel rust readily when exposed to the combination of air and moisture.
So to know what is the best stainless steel tank we should choose it based on the usage requirement .if you want the stainless steel have more stronger resistance to corrosion then stainless steel 316 it better than stainless steel 304 . stainless steel 304 is better than 403 .etc