Basic concept of pearlite
The pearlite is a mechanical mixture of ferrite and cementite, represented by the symbol "P". The average carbon content of the pearlite structure in carbon steel is about 0.77%. Its mechanical properties are between ferrite and cementite, that is, its strength and hardness are significantly higher than that of ferrite. Plasticity and toughness are worse than ferrite, but much better than cementite.
Pearlite is a structure in which austenite is precipitated at the same time as austenite, and the structure of ferrite and cementite is intercalated. Pearlite is one of the five basic structures in iron-carbon alloy. The code is P. It is named after the discoverer.