High speed steel should have high___________________?
Correct answer: D. Both B. & C.
- A. Toughness
- B. Wear resistance
- C. Hardenability
- D. Both B. & C.
Explanation
High-speed steel must retain hardness at elevated cutting temperatures and resist abrasion, so high wear resistance and hardenability are essential. Toughness is useful, but these two listed properties are the intended combination.
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