Molybdenum steels are known for which properties?

• A. increase ductility
• B. increase hardenability and high-temp strength
• C. decrease wear resistance
• D. are not used in high-temperature applications

Answer: (B)

Molybdenum is added to steel to boost performance where heat and strength matter. It increases hardenability, meaning thicker sections can be hardened through quenching and achieve a stronger, more durable martensitic structure. It also raises strength at high temperatures, improving creep resistance and stability when the steel is hot. These combined effects make molybdenum steels well-suited for components that see high temperatures or demanding wear conditions. That’s why the correct description is increased hardenability and high-temperature strength. Other choices don’t fit: molybdenum steels aren’t chosen for primarily increased ductility; they don’t inherently degrade wear resistance, and they are indeed used in high-temperature applications.