D2 steel is a high-carbon, high-chromium, air-hardening tool steel that is commonly used for the following applications:

• Cold work tooling: D2 steel is frequently used to make punches, dies, and shear blades that are used in metal forming and cutting operations.
• Knives and cutting tools: D2 steel is often used to make high-wear knives and cutting tools, such as hunting knives and woodworking tools.
• Measuring tools: D2 steel is sometimes used to make measuring tools, such as gauges and rulers, due to its dimensional stability and resistance to wear.
• Molds: D2 steel is used to make molds for plastic and rubber products, as well as for injection molding and compression molding applications.
• Machine parts: D2 steel can be used to make machine parts, such as gears and shafts, that require a high degree of wear resistance and toughness.