13. Pearlite is a lamellar aggregate of ferrite and cementite. It is a result of the eutectoid reaction which takes place when a plain carbon steel of approximately 0.8% carbon is cooled slowly from the temperature range at which austenite is stable. Presented by Ansar Hussain Rizvi
Impact transition temperature is defined The temperature at which a transition from ductile to brittle fracture takes place in steel. It is usually determined by making a series of Charpy impact tests at various temperatures, the transition temperature is usually taken as the point where 50% of the fracture is brittle.