CROLOY 5 Si is a chromium-silicon-molybdenum heat resisting steel recommended for operating conditions at elevated temperatures where oxidation resistance is a primary requirement. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-78. Producer or source: Babcock & Wilcox Company.