Primitive iron was inferior to bronze and harder to produce. It was weak, malleable, and rapidly rusted. It only became practical once people learned to make a primitive steel by adding charcoal. This is why it took a long time for iron to replace bronze.
Primitive steel only becomes common in the middle ages... 2000 years later.
Alexander had an iron sword. Julius had an iron sword.
The problem with iron is that it is very hard to make. Requires lots of fuel, labour and technology.
> Primitive iron was (...) malleable
> primitive steel [made] by adding charcoal.
Isn't that backwards? Surely "primitive iron" was closer to what we call pig iron nowadays.
https://en.wikipedia.org/wiki/Pig_iron
That stuff is choke-full of carbon and silica, and is brittle as hell. To get it malleable (which is actually desirable in a weapon, so it wouldn't just snap in use), there is a separate process to decrease carbon content:
https://en.wikipedia.org/wiki/Wrought_iron#Terminology