Sandvik 9RU10 is a precipitation hardening stainless steel with the highest relaxation resistance of all of the Sandvik wire grades. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and shear and bend strength It also includes information on forming and heat treating. Filing Code: SS-1248. Producer or source: Sandvik Steel Company. Originally published July 2016, revised September 2016.