stainless steel plate (stainless steel acid-resistant steel) SUS301 (permanent jump) Cr (chromium) content is less than SUS304, and corrosion resistance is weak, but good strength and tensile strength can be obtained after cold drawing, and have better ductility. It is suitable for use with spring leaf torsion springs and anti-EMI. sheet metal custom processing sheet metal has the characteristics of light weight, high compressive strength, good conductivity (can be used for magnetic shielding), low cost and good mass production characteristics. It has been widely used in electronic products, communications, automotive industry, medical equipment and other industries, such as sheet metal hand plate in the main computer chassis, mobile phones and MP3, sheet metal is an indispensable part. Suzhou automobile chassis production and processing is the core technology that sheet metal professionals must master, and it is also the main process of producing sheet metal products. It not only includes the traditional laser cutting and blanking, stamping, bending and forming methods and process main parameters, but also includes the structural characteristics and process main parameters of various cold stamping dies, the basic principles and operation steps of various facilities, and its new stamping technology and new process.