Engineering Materials
Sulphur in steel

Lowers the toughness and transverse ductility
Decreases tensile strength and hardness
Reduces the grain size
Acts as deoxidiser

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Engineering Materials
Smelting is the process of

All of these
Reducing the ore with carbon in the presence of a flux
Removing the impurities like clay, sand etc. from the iron ore by washing with water
Expelling moisture, carbon dioxide, sulphur and arsenic from the iron ore by heating in shallow kilns

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