Question

The critical range of steel is between ______

(a) 1300°F and 1600°F

(b) 2400°F and 2600°F

(c) 900°F and 2800°F

(d) 900°F and 2400°F

I got this question in quiz.

This intriguing question comes from Heat Treatment Terms topic in chapter Physical Test & Heat Treatment Terms of Aerospace Materials & Processes

Answer 1

Right answer is (a) 1300°F and 1600°F

The explanation is: The critical range of steel is between 1300°F and 1600°F. Critical range of a material refers to the range between which internal change occurs in a metal. It is important in a lot of heat treatment methods.