7668Chemical EngineeringMedium
Maximum change in the hardness of martensite occurs in the carbon content range of ________ percent in steel?
A0.5 to 0.7
B0.01 to 0.10
C0.8 to 1.0
D0.2 to 0.4
Correct answer
D. 0.2 to 0.4
Explanation
The correct answer is 0.2 to 0.4.