Which of the following has the poorest weldability ?
Correct answer: D. High-carbon steel
- A. Low carbon steel
- B. Mild steel
- C. Wrought iron
- D. High-carbon steel
Explanation
High-carbon steel is difficult to weld because its high carbon content promotes hard, brittle heat-affected zones and cracking. Low-carbon steel, mild steel, and wrought iron are generally much more weldable.
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