What is the amount of silicon present in cast carbon steels?(a) 0.25%

1.	What is the amount of silicon present in cast carbon steels?(a) 0.25% – 0.6%(b) 0.25% – 0.8%(c) 0.45% – 0.9%(d) 0.45% – 0.1%I had been asked this question in semester exam.This intriguing question originated from Classification of Foundry Metals and Alloys in section Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» The correct choice is (B) 0.25% – 0.8% To explain I WOULD say: The amount of silicon that is present in TERMS of percentage composition is FOUND to be 0.25% to 0.8%. Elements like silicon and manganese are added in the steel alloys for the PURPOSE of deoxidation.

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