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Pig iron from blast furnace contains ________ silicon.

(a) 2.5%–3.0%

(b) 0.3%–1.0%

(c) 1.5%–2.0%

(d) 0.1%–0.5%

I got this question in examination.

The doubt is from Manufacture of Tinplate in chapter Metal Packaging Materials of Food Packaging Technology

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Right answer is (b) 0.3%–1.0%

To elaborate: Pig iron from blast furnace contains 0.3%–1.0% silicon. Hardness of pig iron decreases with increase in silicon. But, addition of a little amount of silicon improves the microstructure.

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