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Material property for shock-resisting steels: Identify the most critical requirement. Design focus: Select the dominant mechanical property needed when steels must withstand sudden impacts and shocks. Choose the correct property.

Difficulty: Easy

Low wear resistance
Low hardness
Low tensile strength
High toughness
High thermal conductivity

Correct Answer: High toughness

Explanation:

Concept
Shock-resisting steels must absorb impact energy without brittle fracture. The governing property is toughness (high area under the stress-strain curve in the plastic region).

Common pitfall
Confusing hardness or tensile strength with toughness. High hardness may increase brittleness, which is undesirable under shock loading.

Final Answer
High toughness

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