Transcription of Weld Cracking - Lincoln Electric
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Weld Cracking - Lincoln Electric
weld CrackingAn Excerpt from The Fabricators' and Erectors'Guide to Welded steel ConstructionThe James F. Lincoln Arc welding Foundation1 weld CrackingSeveral types of discontinuities may occur in welds orheat affected zones. Welds may contain porosity, slaginclusions or cracks. Of the three, cracks are by far themost detrimental. Whereas there are acceptable limitsfor slag inclusions and porosity in welds, cracks arenever acceptable. Cracks in a weld , or in the vicinity ofa weld , indicate that one or more problems exist thatmust be addressed.
the weld bead. Although it is related to the welding process, the crack occurs in the base material, not in the weld material. This type of cracking is also known as “underbead cracking,” “toe cracking,” or “delayed crack-ing.” Because this cracking occurs after the steel has cooled below approximately 400°F, it can be called “cold
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