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← HistoryFor early cast iron production in China, which outcome resulted from charcoal containing high sulfur?
A)Brittle iron parts, increased failure✓
B)Higher carbon content, increased hardness
C)Lower melting point, easier casting
D)Faster oxidation, better steel creation
💡 Explanation
Increased brittleness of parts occurred because sulfur acted as an impurity during solidification via grain boundary segregation, causing stress concentrations; therefore, components made with high-sulfur iron failed at lower stresses, rather than gaining the lower melting points or superior hardness.
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