You may have noticed that the symbol used here is the same as the one used for "male". There were two common and related alchemy symbols used to represent the metal iron. One was a stylised arrow, drawn pointing up or to the right. The other common symbol is the same symbol used to represent the planet Mars or "male"(shown above)
In alchemy, iron is representative of the planet mars in astrology. As such, iron rules physical strength, and symbolises predominantly male energy.
The origin of irons chemical symbol Fe is from the Latin word ‘ferrum’ meaning iron. The word iron itself comes from ‘iren’ in Anglo-Saxon.