Minimum cover: the reduction Δcdur,st for stainless steel
Eurocode 2 part 1-1: Design of concrete structures 18.104.22.168 (7)
Where stainless steel is used or where other special measures have been taken, the minimum cover may be reduced by Δcdur,st. For such situations the effects on all relevant material properties should be considered, including bond.
The recommended value for Δcdur,st, without further specification, is 0 mm.