Stainless steel alloy 15-5, also referred to as UNS S15500, is a precipitation-hardening stainless steel prized for its impressive combination of high strength, excellent corrosion resistance, and good toughness. This alloy contains around 15% chromium, 5% nickel, and 3.5-5.5% copper, along with small amounts of other elements. Its unique composition allows for heat treatment to achieve varying levels of hardness, making it suitable for applications requiring robust performance, such as aerospace components, nuclear reactors, and chemical processing equipment. Stainless steel alloy 15-5 demonstrates resistance to a wide range of corrosive environments, including high-stress and marine environments. Its ability to retain its mechanical properties at elevated temperatures adds to its versatility. As a result, stainless steel alloy 15-5 is a reliable and sought-after material choice for challenging engineering and industrial applications.