Question

What is the hot rolling temperature of mild steel?

(a) 200^oC

(b) 450^oC

(c) 1000^oC

(d) 1200^oC

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I'm obligated to ask this question of Cryogenics, Hot and Cold Working of Metals topic in section Mechanical Working Processes & Phase Transformations of Engineering Material & Metallurgy

Answer 1

Right answer is (c) 1000^oC

The explanation: Hot rolling is carried out at a temperature above 0.7 Tm. Here, Tm is known as the melting point temperature in Kelvin. This temperature is at 1000^oC for mild steel and 450^oC for aluminum.