Multiple choice

Alloy of aluminium containing small amount of magnesium is

  1. Duralumin

  2. Alnico

  3. Rose metal

  4. Stellite
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A Correct answer
Explanation

It is an alloy of aluminum that contains copper, manganese, magnesium, iron, and silicon and is resistant to corrosion by acids and sea water.Duralumin alloys are relatively soft, ductile, and workable in the normal state; they may be rolled, forged, extruded, or drawn into a variety of shapes and products. Their light weight and consequent high strength per unit weight compared to steel suit them for aircraft construction.

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