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Just as chemistry determines what is to be alloyed with the steel, the treatments which can be given to the steel are determined by the variables of pressure, temperature and time.
Science and engineering are combined to exercise a control over these variables under conditions where the research investigator can examine the contribution of each variable and where he can optimize the combination of variables to produce steels with superior properties. Recently this type of investigation resulted in a physical simulation of hot rolling through the experiments in the laboratory – experiments in which the steel is not even rolled!

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