... bump, scuffing, edge chipping, crackle, abrasion, wear and tear, miscalculation in manufacture XKS-02 cast iron defect ... scuffing, edge chipping, pinhole porosity, crackle, abrasion, wear and tear, miscalculation in manufacture, defect in manufacture, welding defect. ... steel, casting steel, cast iron, cast aluminum, tungsten carbide alloy, and all electrical conductor.4. The position: Sharp corner, ...