Question

Steels containing ________ carbon are used for carburizing.

(a) 0.1-0.2%

(b) 0.2-0.35%

(c) 0.4-0.6%

(d) 0.7-0.9%

The question was asked in an online quiz.

My doubt is from Carburizing topic in section Heat Treatment of Engineering Material & Metallurgy

Answer 1

Right option is (a) 0.1-0.2%

To explain I would say: Carburizing the process by which carbon atoms are introduced onto the surface of low-carbon steels to produce a hard casing while the core remains soft. Steels used in carburizing contain carbon content of 0.10-0.20%.