No one said that the iron cannot, or did not melt. What I said, was that as you heat iron/steal from normal ambient temperatures through 1,671 F, on the way to the melting point (2,800 F), the crystalline configuration of iron changes. Iron/steel will undergo normal and expected expansion from room temperature and up, but when it crosses above 1671 F - it will SHRINK by half, as the atomic crystalline structure changes. No force on earth can stop it. It's done at the atomic level.

As you continue to heat the iron, beyond the face centered cubic phase (A4 point), eventually it will melt into a liquid. This is an area of metallurgy called Materials Science. Something most engineers learn.

No one said that the iron cannot, or did not melt. What I said, was that as you heat iron/steal through 1,671 F, on the way to the melting point (2,800 F), the crystalline configuration of iron changes, and while Iron/steel will undergo normal and expected expansion - when it crosses above 1671 F - it will SHRINK by half, as the crystalline structure changes.

As you continue to heat it, eventually it will melt. This is an area of metallurgy called Materials Science. Something most engineers learn.