What type of contraction effects in weld metal are considered to be more serious?

Transverse contraction effects in weld metal are considered more serious primarily because they can lead to significant distortion in the welded assembly. Unlike longitudinal contraction, which generally extends parallel to the weld, transverse contraction affects the width of the weld and can create a bowing effect in the material being welded. This distortion can result in misalignment of parts, increased stress concentrations, and can compromise the integrity and overall fit of the final product.

Moreover, transverse contraction can also introduce challenges during subsequent fabrication processes or assembly, as parts may no longer fit together as designed. The complexity of addressing these distortions can lead to increased costs and time, making the management of transverse contraction critical in welding procedures. Understanding and controlling this type of contraction is essential for maintaining high-quality welds and ensuring structural integrity.