Question

70. Cold working of steel is defined as
working
(1) At its recrystallisation
temperature
(2) Above its recrystallisation
temperature
(3) Below its recrystallisation
temperature
(4) At two thirds of the melting
temperature of the metal​

Answer 1

Answer:

above it's crystallization temperature

Explanation:

work hardening makes the metal harder ,stiffer,and stronger but less plastic, and may cause crack of piece