Both had steel. The issue with steel is that creating it via a bloomery furnace is a finicky process on top of what was already finicky process just to produce a bloom of iron, enough that even during the (central) medieval when it was more common, the price of steel was four times that of iron, being able to outfit multiple legions with steel equipment was an expensive process such that making do with relatively inferior wrought iron for most of the gear was a more pragmatic choice that did little to hinder effectiveness.