____ will decrease the steel's hardness, increase toughness, and relieve some internal stress so it will be more durable and usable.
A) Quenching
B) Tempering
C) Normalizing
D) Flame hardening

Question

Quizplus · Accepted Answer

Tempering is the process where the hardened steel is heated to a temperature below its critical point, held for a certain time, and then cooled in still air. This process decreases the steel's hardness, increases toughness, and relieves internal stress which makes it more durable and usable.

____ Will Decrease the Steel's Hardness, Increase Toughness, and Relieve