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How much manganese does ferromanganese contain?

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How much manganese does ferromanganese contain?

(a) 10-16%

(b) 22-32%

(c) 45-62%

(d) 74-82%

I had been asked this question in final exam.

Query is from Sintering and Compacting, Pig Iron and its Manufacture topic in division Testing of Materials, Foundry & Powder Metallurgy of Engineering Material & Metallurgy

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Right option is (d) 74-82%

For explanation I would say: Ferromanganese and ferrosilicon are two ferroalloys of pig iron, which are used as additives. Ferromanganese contains about 74-82% manganese, whereas ferrosilicon contains 5-17% silicon.

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