Cold crack - Welding defects


Figure 1: Cold crack or weld metal, hydrogen crack.

Defect name: Cold crack
Record No.: 914
Type of defect (Internal/Surface): Internal
Defect classification: Welding defects
Steel name: Steel
Steel composition in weight %: No data.
Note:  
Definition: A crack that occurs after the metal has completely solidified.
Cause: Shrinkage, highly restrained welds, discontinuities.
Prevention: Preheat, weld toward areas of less constraint, use a more ductile weld metal.
Repair: Remove and reweld, correct problem first, preheat may be necessary.
Reference: Not shown in this demonstration version.

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