The main objective of alloy making are

i) To increase hardness

ii) To increase tensile strength

iii) To increase the melting point

iv) To modify chemical reactivity

The main objective alloying is

i) To increase hardness

ii) To increase tensile strength

iii) To increase resistance corrosion

iv) To lower melting point

v) To modify chemical reactivity

vi) To produce good casting

vii) To reduce electrical conductivity.