Question

Assertion duralumin anf magnalium are used for making aircraft frames.

Reason they are very light and almost as tough as steel
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Answer 1

Answer:

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Answer 2

Answer:

Duralumin, strong, hard, lightweight alloy of aluminum, widely used in aircraft construction, discovered in 1906 and patented in 1909 by Alfred Wilm, a German metallurgist; it was originally made only at the company Dürener Metallwerke at Düren, Germany. 

Explanation:

Magnalium is an aluminium alloy with 5% magnesium and 95% aluminum.

Aluminium alloys such as duralumin is light, tough and resistant to corrosion and hence is used to make aircraft body.

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