X155CrMoV12

X155CrMoV12 is a high-carbon, high-chromium tool steel known for its excellent wear resistance and hardenability. Its chemical composition typically includes around 1.5% carbon, 12% chromium, and smaller amounts of molybdenum and vanadium. This specific combination of elements provides a good balance of hardness, toughness, and resistance to abrasive wear, making it suitable for applications where cutting edges or forming surfaces are subjected to significant friction and abrasion.

The high carbon content contributes to the formation of a large volume of carbides within the steel matrix after heat treatment. These carbides, particularly chromium carbides, are extremely hard and are responsible for the steel's superior wear resistance. The molybdenum and vanadium further enhance hardenability, allowing for deeper hardening and improved strength throughout the cross-section of a component. They also contribute to tempering resistance, meaning the steel can maintain its hardness at higher operating temperatures.

X155CrMoV12 is commonly used in the manufacturing of blanking and stamping dies, slitting cutters, knives, and other tools that require a sharp edge and the ability to withstand prolonged abrasive use. It is typically supplied in a hardened and tempered condition or in an annealed state for subsequent machining. Due to its high carbon and chromium content, it can be susceptible to corrosion if not properly protected, although the chromium does provide a degree of stainlessness. Proper heat treatment is critical to achieve the optimal properties of this steel.