Correct option is A
Duralumin is an alloy of
aluminium (95%),
copper (4%),
magnesium (0.5%), and
manganese (0.5%). It is widely used in the
aerospace and
automobile industries due to its:
·
Lightweight nature.
·
High strength-to-weight ratio.
· Good
corrosion resistance when treated.
Other materials:
·
German silver: An alloy of copper, zinc, and nickel used in utensils, jewelry, etc.
·
Magnalium: An aluminium-magnesium alloy used in engineering structures.
·
Aluminium bronze: An alloy of copper and aluminium used in high-strength applications like marine components.
