During solidification, these elements segregate such that intergranular liquid films remain once the bulk of the weld has solidified. For steels, solidification cracks occur due to the presence of high carbon content and impurity elements like sulfur and phosphorus. Solidification cracking occurs in compositions having a wide freezing temperature range. The cracks can be wide and open and possibly narrow. The solidifying weld bead has a larger depth-to-width ratio (deep and narrow).Weld metal possesses high carbon or impurity content.1: Welding Defects-Solidification Hot Crack Types of Welding Defects / Welding Defect Typesĭepending on the location of the Welding defects, they are classified into two groups:įig. It is important that a welding defect is correctly identified so the cause can be established and actions are taken to prevent further occurrence. When any discontinuity exceeds those acceptable code limits they are considered welding defects. Various codes and standards like BS EN ISO 6520-1, BS EN ISO 5817, and BS EN ISO 10042 provide acceptable limits for welding irregularities. Weld Acceptance Criteria for Completed Welds.Types of Welding Defects / Welding Defect Types.
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