Question

Which steels are generally used for making connecting rods and gear shafts?

(a) Low carbon steels

(b) Medium carbon steels

(c) High carbon steels

(d) Stainless steels

I had been asked this question in semester exam.

The above asked question is from Fick’s Law, Carbon Steels in chapter Diffusion in Solids & Ferrous Materials of Engineering Material & Metallurgy

Answer 1

Correct choice is (b) Medium carbon steels

For explanation: Connecting rods and gear shafts are commonly made using medium carbon steels containing 0.35% to 0.45% carbon. They possess a tensile strength of 750 N/mm2. This gives the required strength and hardness to the parts.