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Question

Hardness of steel depends on _______.

A.

amount of cementite it contains

B.

amount of carbon it contains

C.

contents of alloying elements

D.

method of manufacture of steel

Answer ( Option B)

amount of carbon it contains

Solution

  • Hardness is defined as the ability of material to resist abrasion, indentation and wear.
  • It increases with increase in carboncontent.

Note :

  • As hardness increases, ductility of material decreases. 
  • As hardness increases, toughness of material decreases. 

Hence, the correct option is (B).

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