Abstract: A martensitic stainless steel alloy having a good combination of machinability, hardness capability, and corrosion resistance is disclosed which contains, in weight percent, about:______________________________________ Preferred A Preferred B Preferred C ______________________________________ C up to 0.07 up to 0.07 up to 0.07 N up to 0.07 up to 0.07 up to 0.07 C + N up to 0.08 up to 0.08 up to 0.08 Cu 1.0-3.0 1.0-3.5 1.0-3.5 delta ferrite up to 11 up to 3 7-11 Cr 10.0-14.0 10.0-14.0 10.0-14.0 S 0.15-0.55 0.15-0.55 0.15-0.55 Mn up to 1.25 up to 1.25 up to 1.25 Si up to 1.0 up to 1.0 up to 1.0 P up to 0.06 up to 0.06 up to 0.06 Ni up to 1.0 up to 1.0 up to 1.0 Mo up to 1.0 up to 1.0 up to 1.0 B up to 0.01 up to 0.01 up to 0.01 Te up to 0.10 up to 0.10 up to 0.10 Se up to 0.25 up to 0.25 up to 0.25 Bi up to 0.15 up to 0.15 up to 0.15 Nb up to 0.10 up to 0.10 up to 0.10 ______________________________________and the balance is essentially iron.