Which of the following contains maximum percentage of carbon ?
Correct answer: C. Saws for cutting steel
- A. Boiler plate steel
- B. Rail steel
- C. Saws for cutting steel
- D. Railway spring steel
Explanation
Steel saws require high hardness and edge retention, so they generally contain more carbon than boiler-plate, rail, or spring steel. Increased carbon improves hardness but reduces ductility and weldability.
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