Question

What makes plain carbon steel harder than pure iron?

Answer 1

Answer:

Steel is a mixture of several metals (this is called an alloy) but most of it is iron. Steel is harder and stronger than iron. Steels are often iron alloys with between 0.02% and 1.7% percent carbon by weight. Alloys with more carbon than this are known as cast iron. Steel is different from wrought iron, that has little or no carbon. There are some newer steels in which carbon is replaced with other alloyingmaterials.

Answer 2

Explanation:

Something made of pure iron is softer than steel because the atoms can slip over one another. If other atoms like carbon are added, they are different from iron atoms and stop the iron atoms from sliding apart so easily. This makes the metal stronger and harder.......

please mark as brainliest