What property of steel is enhanced by the addition of vanadium?

• A. Heat-treatability by quenching
• B. Hardenability
• C. Fatigue strength
• D. Resistance to oxidation at elevated temperature

Answer: (B)

The addition of vanadium to steel primarily enhances its hardenability. Hardenability refers to the ability of steel to be hardened through heat treatment processes, which is critical for improving the overall performance and durability of the material. When vanadium is introduced into the steel, it promotes the formation of fine, stable carbides, which not only improve hardness but also contribute to better strength and toughness in the final product. This is particularly valuable in applications where high strength and resistance to wear are required.

Furthermore, vanadium helps to refine the grain structure of steel, which enhances its mechanical properties. As a result, steels with higher vanadium content can achieve a greater hardness at a given carbon level than those without vanadium, making the material more responsive to heat treatment and improving its usability in applications where these properties are essential. This is why the correct response to the question is that the addition of vanadium enhances the hardenability of steel.