Hi Amanda
Have a look at 3Cr12. It is a low cost "lean" stainless steel. (although often the suppliers do not really want to market it as "stainless") Improved corrosion and abrasion resistance and improved strength. May be a little more expensive up front, but may give good returns in the long run. It is often used for transport applications, so is proven in these types of applications.
Regards
Niekie