Question

Which of the following is not a classification of aluminum alloys?

(a) Crucible alloys

(b) Wrought alloys

(c) Cast alloys

(d) Heat-treatable alloys

The question was asked during an online interview.

My doubt stems from Aluminium and its Alloys, Zinc and its Alloys in portion Non Ferrous Materials of Engineering Material & Metallurgy

Answer 1

The correct choice is (a) Crucible alloys

For explanation I would say: Aluminum alloys are categorized into wrought alloys, cast alloys, heat-treatable, and non heat-treatable alloys. An example of each is 2.5% Mg, 0.25% Cr, and rest Al (wrought), 12% Si and rest Al (cast), 0.4-0.9% Mg, 0.3-0.7% Si, and rest Al (heat-treatable), and (0.8-1.5% Mn and rest Al (non heat-treatable).