Q. Duralumin which is used in making aero planes is an alloy consisting of _____?
Answer: Aluminum, Copper, Manganese & Magnesium
Notes: Duralumin is an alloy primarily composed of aluminum, copper, manganese, and magnesium. It was developed in the early 20th century and is known for its high strength-to-weight ratio, making it ideal for aircraft construction. The addition of copper enhances strength, while manganese and magnesium improve corrosion resistance and workability. Duralumin was first used in aircraft during World War I, revolutionizing aviation materials.