Which of the following is not a principal alloying element for the structural steel ?
Correct answer: A. Molybdenum
- A. Molybdenum
- B. Nickel
- C. Manganese
- D. Chromium
Explanation
Manganese, nickel, and chromium are commonly used alloying elements in structural steels, whereas molybdenum is a more specialised addition used for particular properties such as high-temperature strength. Therefore, molybdenum is the exception in this list.
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