Ferralium 255-3AF is a modification of Ferralium 255 (see Alloy Digest SS-481, January 1987), one of the early superduplex stainless steels. The 255 alloy has been modified over time with special chemistry, heat treatment, and production methods. This version is the age-hardened grade, or a Stamicarbon grade, and is supplied only in bar form. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming and machining. Filing Code: SS-1007. Producer or source: Langley Alloys.