Steels, which are alloys of iron and carbon, are one of the most commonly used industrial materials. The amount of carbon that is added to the steel dramatically affects the materials microstructure and mechanical properties. In this video we cover the iron-carbon equilibrium phase diagram and explore how changing the composition of low alloy steels impacts the microstructure by analysing the phases that form. 00:00 Introduction 00:23 Why is this important? 01:54 Equilibrium phase diagrams 03:23 Different ferrous alloys 06:26 Different phases of iron - Ferrite and austenite 07:46 Iron-carbon alloys - Ferrite and cementite 08:55 Iron-carbon phase diagrams 10:58 The eutectoid composition - Pearlite 11:57 Hypo/hyper-eutectoid composition 14:42 Summary This is a follow up video to a previous one on "How to use phase diagrams and the lever rule to understand metal alloys". https://www.youtube.com/watch?v=huvtkdn_keY Interested in learning more? 📚I highly recommend the textbook "Material Science and Engineering" by Callister and Rethwisch which you can get here https://amzn.to/3Ut5Efr (Amazon) #Steel #PhaseDiagrams #Pearlite Twitter: https://twitter.com/ICBillyWu Personal website: https://www.imperial.ac.uk/people/billy.wu About us: https://www.imperial.ac.uk/design-engineering/