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Stainless Steel Alloy 15-5 | Product Properties, Composition & Machinability
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- 15-5
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.
Product Properties
Chemical
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Alloying Elements
Chromium: Most important element of stainless steel. An addition of 10% chromium will form an oxide film (passive surface film) which renders the steel corrosion resistant. Chromium also increases resistance to scaling.
Nickel: Second most important element. It increases ductility, corrosion resistance, scaling resistance, and high-temperature strength.
Silicon: Primarily increases resistance to scaling.
Manganese: Improves hot-working properties.
Molybdenum: Increases corrosion and high-temperature strength.
Sulfur-Phosphorus-Selenium: Increases machinability.
Titanium or Columbium-Tantalum: Stabilizes carbon and prevents chromium-carbide precipitation and subsequent intergranular corrosion.
Mechanical
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Physical
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Fabrication
Machinability ratings must be recognized as approximate values. They are a reasonable guide to relative tool life and power required for cutting. Variables of speed, cutting oil, feed, and depth of cut will significantly affect these ratios.
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*Based on Bessemer Screw Stock No. B1112
Machinability ratings must be recognized as approximate values. They are a reasonable guide to relative tool life and power required for cutting. Variables of speed, cutting oil, feed, and depth of cut will significantly affect these ratios.
Disclaimer: The data listed here are recommended starting points. Higher speeds and feeds may be obtainable based on the working environment. Keep in mind that speeds and feeds should always be adjusted in small steps. When using carbide tools; surface speed can be increased 2 to 3 times over the suggested values; feeds can be increased between 50 and 100%.
Characteristics
High strength, corrosion resistant and easy to heat treat. Use for high pressure applications.
Typical Uses
Structural reinforcement components.
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