Question

Which of the following is a perfect composition for medium carbon steel?

(a) Upto 0.3%

(b) 0.3-0.6%

(c) 0.6-1.7%

(d) 1.7-3%

I had been asked this question in an international level competition.

I need to ask this question from Mold Materials in portion Molding and Core Sands of Casting-Forming-Welding I

Answer 1

Right choice is (b) 0.3-0.6%

For explanation: The sequence of composition is in order from low carbon steel to high carbon steel till 1.7% carbon. Medium carbon steel belongs to a region of 0.3-0.6% carbon.