What type of alloy steel is known for both hardness and yield strength, specifically used in bi-metal saw blades?

The type of alloy steel known for both hardness and yield strength, particularly in the context of bi-metal saw blades, is spring steel alloy. Spring steel is a specific type of carbon steel that is treated to retain its shape and possesses excellent tensile strength and elasticity. These properties make it well-suited for applications that require both durability and the ability to flex without breaking, which is essential in cutting tools like saw blades.

Bi-metal saw blades utilize a combination of two different metals, typically incorporating a hard steel for the cutting edge and a more ductile steel for the backing, allowing for both the sharpness needed for cutting and the flexibility to withstand the stresses of operation without fracture. Spring steel's inherent properties enhance these blades' performance by providing a strong and resilient structure that can endure repeated use.

In contrast, while carbon steel has good machinability and strength, it does not match the specific balancing of hardness and flexibility provided by spring steel in demanding applications. Stainless steel is primarily known for its corrosion resistance rather than its hardness and yield strength, which limits its effectiveness in high-stress cutting applications. High-speed steel is designed for cutting tools that operate at high speeds and temperatures, but it is not specifically tailored for the same balance of properties required in bi