Not the precise answer but I had a similar question few months back and I got a very informative answer from u/wotan_weevil -

https://www.reddit.com/r/AskHistorians/comments/usyf19/how_effective_was_iron_in_the_iron_age_vis_%C3%A1_vis/?utm_source=share&utm_medium=ios_app&utm_name=iossmf