Question

What is the amount of silicon used in HPF steel?

(a) Less than 0.30%

(b) Less than 0.20%

(c) Less than 0.40%

(d) Less than 0.50%

This question was addressed to me in final exam.

My question is from Inverse Rate Curves for Steel in section Heat treatment of Metals and Alloys of Casting-Forming-Welding II

Answer 1

Correct answer is (d) Less than 0.50%

Easiest explanation: The silicon content which is used in HPF steel is very less in percentage composition. The amount of silicon used in terms of percentage weight is less than 0.50%.