Module 9: Weld and Base Metal Discontinuities
Rework and repair are estimated to be 10-15% of actual fabrication costs. That’s $7 billion annually in the United States alone. So, when is a defect acceptable and a discontinuity unacceptable?
This module describes different types of discontinuities (including cracks, incomplete fusion, incomplete joint penetration, inclusion, porosity, undercut, overlap, convexity, spatter, lamination, and lamellar tears) and explains why these problems occur, how to identify them, and how can they be avoided.