Primary designation of steel is based on its__________________?
Correct answer: D. Alloying elements content
- A. Hardness & tensile strength
- B. Carbon content
- C. Iron content
- D. Alloying elements content
Explanation
The primary designation of steel is based on its chemical composition, especially the alloying elements present. Hardness and tensile strength are mechanical properties used for secondary classification, not the primary designation.
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