With 3% chromium it (SR77) is a little more rust resistant than SR101 at 1.5% chromium. Neither is even close to a stainless, which is usually a designation for steels containing 13% or more chromium. The chromium in the steel forms a sacrifical layer of Chromium oxide which protects the steel from rust. The good thing about this oxide layer is that it self-heals. That is, that if it is scratched the oxide will reform and continue to protect the steel. That being said, both will rust if not cared for albeit at slightly different rates. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" /> <img src="/ubbthreads/images/graemlins/thumbup.gif" alt="" />