Question

Write the composition and uses of the following alloys:

1. Brass
2. Solder
3. Duralumin

Answer 1

1:

• Brass: Main components of Brass are Copper (Cu) and Zinc (Zn).
• The composition of Copper is 60-80% and Zinc is 20-40%.
• Brass is used in the manufacturing of scientific instruments like barometer, telescope, microscope, etc.

2:

• Solder: It is an alloy of Lead (Pb) and Tin (Sn).
• The composition of Lead is 50 % and Tin is 50 %.
• Solder is most commonly used in soldering electrical appliances.

3:

• Duralumin: Main composition of Duralumin are Aluminium (Al) $\mathbf{95}\mathbf{\%}$ Copper (Cu) $\mathbf{4}\mathbf{\%}$ Manganese (Mn) $\mathbf{0}\mathbf{.}\mathbf{5}\mathbf{\%}$ and Magnesium (Mg)$\mathbf{0}\mathbf{.}\mathbf{5}\mathbf{\%}$.
• Duralumin is used for making aeroplanes, pressure cooker, space craft etc.