Defect Catalog Extract
Alternative terms: Lap, Scab, Sliver, Shell
Appearance: Laminations are narrow longitudinal marks which run in production direction.
Alternative terms: Edge Fault, Edge Crack
Appearance: Discontinuations of material from surface to surface at strip edges.
Alternative terms: Groove, Gouge
Appearance: Line-type defect, which usually runs longitudinal to the rolling direction. Scratches will most often occur as a multiple, continuous defect.
Appearance: Line-type defect that runs perpendicular to the rolling direction (multiple lines at both edges of the coil).
Alternative terms: Fold, Pinch Tree, Feathering, Heat Buckle
Appearance: The defect can appear at any location of the strip and has mostly a severe expression.
Alternative terms: Wrinkle, Fold, Lap
Appearance: Areas of strong material imprint forming hills or craters. Usually damage appears as multiple occurrences.
Appearance: Rust is a surface layer of corrosion products. It appears as mostly black stain. Shape and pattern may vary considerably.
Appearance: Residual scale has not been completely removed by pickling and is rolled into the surface. Its appearance ranges from linear or dot-like to wide-area flaws.
Alternative terms: Imprint, Indentation, Roll Mark
Appearance: Dents occur as protuberances on the top and or bottom side of the strip.