>>96007869 Yeah, I think iron is going to have a huge range in hardness but also part of the challenge is understanding how all of it works paired with consistency in temperatures and reaching the needed melting points.
Also, I recall seeing some discussion ages ago about the metallurgy of Greek bronze versus Persian bronze at the time of Marathon. The material properties of Greek bronze was generally better than that of the Persians, affording them better individual soldier capability on the battlefield, apparently.