Defects found in die-cast products arise from multiple causes including process control, mold design, material purity, and casting stability. Porosity is one of the most common defects, and it can affect sealing performance, internal density, vibration resistance, and structural strength. For automotive housings or motor bases, internal porosity may result in leakage or long-term fatigue failure. https://langhefoundry.com/die-casting-services/