A sheet of annealed steel is cold rolled from 10 mm thick to 8 mm thick. What is the amount of cold work? The material is further reduced to 6 mm. What is the additional amount of cold work, and what...

A sheet of annealed steel is cold rolled from 10 mm thick to 8 mm thick. What is the amount of cold work? The material is further reduced to 6 mm. What is the additional amount of cold work, and what is the total cold work? Are the amounts of cold work additive?