How do I check the quality of aluminum coil?

To check the quality of aluminum coil, you should inspect its surface for any defects like scratches, dents, or discoloration. Measure its thickness and width to ensure they meet the specified standards. Test its mechanical properties, such as tensile strength and elongation, to verify its strength and flexibility. Conduct a chemical analysis to confirm the alloy composition and purity. Check for any impurities or inclusions that could affect performance. Finally, assess the coil's flatness and straightness to ensure it's suitable for further processing.