Properties of the HAZ depend on:
- type of base metal
- welding process
- welding procedure
Since different categories of steels behave differently to various heat treatments, the properties of the
HAZ will vary with the type of base metal. The welding procedure will affect the HAZ through the heat
input and cooling rate. Effects of welding on the HAZ are similar to heat treatments involving high
temperatures (as in annealing), and fast cooling rates (as in quenching).