Many aftermarket sellers advertise "Stainless Steel" Hose Clamps, but in order to be totally informed, you will need to ask this question:

Is the screw "stainless steel" also?

While performing maintenance on your vehicle, have you ever come across a hose clamp that is severely rusted and needs replacing (as pictured above)?  

The clamp may be connected to a rubber hose which appears to be in good condition. The hose clamp screws are also rusted to the point that you can't get a tool on the screw head to turn them.  You now need to cut the clamp, but you don't want to damage the hose.     OKAY . . . so you may have saved a few pennies on cheaper clamps, but you're paying for it now.  

BE INFORMED . . . .  Spend a few extra pennies and ask for 100% stainless steel clamps-with a stainless steel screw.  Only a few select manufacturers such as "Ideal Tridon" make a 100% stainless steel clamp whereas the screw is also stainless steel . 

When replacing parts on your vehicle, don't skimp, and be informed, it will save you a lot of time, and grief in the long run.