Question

What is the composition of carbon in medium carbon steels?

(a) 0.05%

(b) 0.1% – 0.3%

(c) 0.25% – 0.6%

(d) More than 0.6%

I have been asked this question in final exam.

This question is from Fick’s Law, Carbon Steels topic in portion Diffusion in Solids & Ferrous Materials of Engineering Material & Metallurgy

Answer 1

Right choice is (c) 0.25% – 0.6%

The best I can explain: Medium carbon steels are those steels which contain 0.25% – 0.6% of carbon, along with traces of manganese, silicon, and copper. Dead mild contains 0.05% of carbon, whereas another mild steel contains 0.1% – 0.3% of carbon. More than 0.6% of carbon is present in high-carbon steel.