VascoMax 250 is an 18% nickel alloy steel having superior toughness and ductility at yield strength levels of 250,000 psi. It is recommended for high strength applications in the temperature range from -320 F to 900 F. It is a martensitic steel strengthened by precipitation and an ordering reaction. This datasheet provides information on composition, physical properties, hardness, tensile properties, and compressive strength 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, joining, and surface treatment. Filing Code: SA-142. Producer or source: Vanadium-Alloys Steel Company.