ABSTRACT
The cooling time, in the most important temperature range from 800 to 500°C–t8/5, can be calculated according to several different expressions. That temperature range is important since all the transformations in steel have to be done within it. Knowing the cooling time and relevant material properties enables prediction of characteristics of the welded joint and the heat affected zone. In the recent times, there is an increase of application of analytical and empirical expressions for calculating t 8/5. The accuracy of several expressions was evaluated comparing their results to the experimental ones, obtained by measurements with thermocouples. The objective of this analysis was to show that expensive experiments can be avoided if analytical and/or empirical expressions can provide sufficiently good results for value of the cooling time t 8/5.
