______________ can replace tungsten in high speed steel ?
Correct answer: D. Molybdenum
- A. Chromium
- B. Vanadium
- C. Cobalt
- D. Molybdenum
Explanation
Molybdenum can substitute for tungsten in high-speed steel because it provides comparable hardness and hot-strengthening effects at high temperature. Vanadium and cobalt are useful alloying elements but are not the principal tungsten substitute here.
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