Civil Engineering Reference
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Figure 22:
Weldability and preheat temperatures [10]
As a result, a remarkable gain in economy is achieved. For example, the welding of a
column with an HD 400 x 1086 section with a flange thickness of tf = 125 mm and a web
thickness of tw = 78 mm, 140 passes are required for a full penetration weld, talking about
8 hours of welding (Fig. 23). For example, for normalized S355 steel, preheating is required
to 110°C which consumes an additional 4 hours. With the use of thermomechanical steel in
HISTAR
®
quality by ArcelorMittal, consequently 1/3 of the welding time can be saved. Fur-
ther welding becomes much more convenient for the welder.
Figure 23:
Welding of a column HD 400 x 1086 kg/m in HISTAR
®
460 (tf = 125 mm, tw
= 78 mm)
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