Question

29. Name the constituents of the following alloys:

(a) Duralumin

Answer 1

Part 1: Definition of alloy:

An alloy is a homogeneous mixture of two or more metals or a metal and a non-metal.

Part 2: Constituents of Duralumin alloy:

• The constituents of duralumin are:

Constituents of Duralumin	% Composition
Aluminium $\left(\mathrm{Al}\right)$	95%
Copper $\left(\mathrm{Cu}\right)$	4%
Manganese $\left(\mathrm{Mn}\right)$	0.5%
Magnesium $\left(\mathrm{Mg}\right)$	0.5%

• Duralumin is used for making frames of aircraft, automobiles and speed boats. It is also used for making kitchen wares (especially pressure cookers).