railway RRB JE (CBT I + CBT II) Mock Test 2024 Engineering Materials Science Structure and Properties of Engineering Materials Properties of Materials
Duralumin contains
1
3.5% to 4.5% copper, 0.4% to 0.7% magnesium, 0.4% to 0.7% manganese and rest aluminium.
2
3.5% to 4.5% copper, 1.2% to 1.7% managanese, 1.8% to 2.3% Nickel, 0.6% each of silicon, magnesium and iron and rest aluminium.
3
4% to 4.5% magnesium, 3% to 4% copper and rest aluminium.
4
5% to 6% tin, 2% to 3% copper and rest aluminium.