1.

For normalising, the steel is heated ___________ its upper critical temperature.

A. 30-40<sup>o</sup>C above
B. 30-40<sup>o</sup>C C below
C. 50-60<sup>o</sup>C C above
D. 50-60<sup>o</sup>C C below
Answer» D. 50-60<sup>o</sup>C C below


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