Suitable for stamping of sheet metal material very much, of sheet metal materials are widely used in electrical and electronic industry including: Common cold-rolled sheet SPCC SPCC refers to the ingot after continuous cold rolling mill rolling requirements the thickness of the steel plate coils or sheets. SPCC surface without any protection, exposing vulnerable to oxidation in air, especially in humid environment accelerated oxidation, dark red rust appears, when used in the painting, plating or other protective surface. Galvanized SECC SECC substrate for General cold rolled steel coil, in zinc plating production line after degreasing, pickling, electroplating and various post-processing after the process, becomes a galvanized product. SECC has not only the General cold rolled steel strip mechanical properties and processability, and has excellent corrosion resistance and decorative appearance. In electronics, home appliances and furniture on the market is very competitive and substitution. For example, commonly used in the computer case is the SECC. Hot-dip galvanized steel SGCC Hot-dip galvanized steel coil is hot-rolled pickling or after cold-rolled semi-finished products, cleaning, annealing, dipping temperatures around 460 ° c dissolves into zinc and zinc plated steel, further leveling is through adjusting the quality and chemical treatment. SGCC worse material than the SECC hard, ductile materials (avoid deep drawing design), the zinc layer is thick, bad welding. Stainless steel SUS301 Cr (chromium) contents of SUS304, poor corrosion resistance, but after cold finishing good tensile and hardness can be obtained, good elasticity, springs and anti-EMI used for shrapnel. Stainless steel SUS304 One of the most widely used stainless steel, because it contains Ni (nickel) than with Cr (chromium) richer steel corrosion resistance, heat resistance, has a very good mechanical properties, thermal treatment hardening, no flexibility.