The auto stamping industry is getting more and more attention because the industry is continuously developing. In order to ensure that all aspects of auto stamping meet the standards, it needs to be inspected. The corresponding inspection method is basically the same as that of other products. Among many inspection items, the inspection of defects and hardness needs to be emphasized. There are many forms of defects in stamping parts, including craters, pockmarks, scratches, cracks, wrinkles, deformation, holes and so on. Relevant parts inspection instructions shall be used as controls during inspection. Secondly, special inspection tools must be used skillfully. There are also samples. As the main material of Automobile Press Parts is die steel, the hardness value of the sample can be determined by testing the difference between its initial speed and the speed after rebound. Moreover, due to the different thickness of the surface layer of stamping parts, the obtained results are necessarily different. As a professional Welding Parts Suppliers, nbstarlite has a great say in this aspect. We can better meet your needs, so please contact us if you are interested.