Martensitic stainless steel

This was later marketed under the "Staybrite" brand by Firth Vickers in England and was used for the new entrance canopy for the Savoy Hotel in 1929 in London.

Additions of boron, cobalt, niobium, and titanium improve the high temperature properties, particularly creep resistance.

With increasing carbon, it is possible by hardening and tempering to obtain tensile strength in the range of 600 to 900 MPa (87 to 131 ksi), combined with reasonable toughness and ductility.

Also, with the higher carbon range in the hardened and lightly tempered condition, tensile strength of about 1,600 MPa (230 ksi) may be developed with lowered ductility.

Martensitic stainless steels, depending upon their carbon content and are often used for their corrosion resistance and high strength.