What is the most commonly used metal?

$\boxed{Iron}$ is a common metal found in the human body and commonly used in appliances, machines, structures etc.

It is one of the important metals essential for the human body,

and widely used in machines and infrastructure,

which makes it the most commonly used metal,

whether directly, or indirectly as an alloy

Iron is the most used but Hydrogen is the most abundant .

It is the 26th element and is found in Earth's core! It sticks to magnets and that effect gives Earth it's magnetism.