Question

In the process of the hardening of aluminum alloys, what is the temperature above which it should be heated?

(a) 1200°F

(b) 600°F

(c) 2400°F

(d) 900°F

I had been asked this question by my school principal while I was bunking the class.

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

Answer 1

Correct option is (d) 900°F

The best I can explain: When a material is heated beyond its critical range, and subsequently undergoes the process of quenching it is called Hardening. Aluminum alloys are heated above temperatures of 900°F to be hardened.