Fifth-Vickers F.V. 520(S) is a corrosion resistant martensitic steel which is readily weldable and capable of being hardened by low temperature heat treatment. It is recommended for turbine components and supersonic aircraft parts. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance as well as forming, heat treating, and joining. Filing Code: SS-208. Producer or source: Firth-Vickers Stainless Steels Ltd.