Postheating in furnaces
As a rule of thumb, the duration of postheating should be at least 5 minutes for every millimeter of plate thickness (i.e., 50 minutes for a 10 mm thick plate).
Postheating in a furnace allows more hydrogen migration from the HAZ, as well as a small as possible reduction of tensile stresses in the HAZ.
The minimum and maximum temperatures are the same as presented in Preheating temperature recommendations.
Heating in furnaces is the best way to preheat the plate, since it provides an even temperature distribution across the entire plate.
Alternatively, a simple and cost-effective solution for postheating is to use electrical heating elements and insulation blankets (such as Rockwool) or to build a heat treatment box for use with electrical heating.
Electrical heating elements and insulation blankets
An inexpensive and practical solution, a heat treatment box used with electrical heating
The information in this report is only applicable to SSAB’s products and should not be applied to any other products than original SSAB products.
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