The welded H-beam has cracked
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Web thickness: 24 mm; Flange thickness: 40 mm. Material: Q345B. Welding method: Submerged arc welding
Made of Q345B material with a relatively thick plate thickness; welding without preheating may result in cracks.
The steel plate is too thick, resulting in high structural stiffness and large welding stresses. Preheating, wire energy control, and heat treatment after welding are advisable.
The structural stiffness is too high; for such welding, preheating and staged welding in sections are required
The thickness of the web and flanges is different, resulting in high stress in the fillet welds. When using submerged arc welding, the welding heat input is relatively high; therefore, attention must be paid to the welding process parameters