Effectoftemperingonhardness
Hardness varieswithtemperingtemperatureandtime. Fig. 8
showsthevariationofhardnesswithrespecttotempering
temperatureandtime.Hardnessdecreaseswithincreasingtem-
pering temperatureandtime.Hardnessismaximum(5674Rc) in
forgedconditionduetomartensiticstructure.Hardnessdecreases