Low C - 13%Cr martensitic stainless steels have been widely used in the oil and gas
industries because of their high strength and excellent corrosion res istance in corrosive conditions.
Recently, higher strength(over 110 ksi grade ) corrosion resistant alloys have been requested from users.
Nb addition is consider ed to be one of the most appropriate strengthening methods. In this paper, the
strengthening of low C - 13%Cr martensitic stainless steel is examined. The e ffect of Nb addition on
mechanical properties and corrosion resistance of low C - 13%Cr martensitic stainless steel i s discussed.
An optimized chemical composition i s also studied.