How to choose the suitable materials for your sheet metal part?
1. Galvanized steel plate SECC
The original material of SECC is common cold-rolled steel. After degreasing, pickling, electroplating and various post-processing treatments in the continuous electro-galvanizing production line, it becomes an electro-galvanized product. SECC not only has the mechanical properties and similar processability of general cold-rolled steel sheets, but also has superior corrosion resistance and decorative appearance. It is highly competitive and substitutable in the markets of electronic products, home appliances and furniture. For example, SECC is commonly used in computer cases.
2. Common cold rolled plate SPCC
SPCC refers to the continuous rolling of steel ingots into steel plate coils or sheets of required thickness through a cold rolling mill. There is no protection on the surface of SPCC. It is easily oxidized when exposed to the air. Especially in humid environments, the oxidation rate accelerates and dark red rust appears. The surface must be painted, electroplated or otherwise protected during use.
3. Hot-dip galvanized steel plate SGCC
Hot-dip galvanized steel coil refers to a semi-finished product that is hot-rolled, pickled or cold-rolled. After cleaning, annealing, and immersing in a molten zinc bath at a temperature of about 460°C, the steel sheets are coated with a zinc layer, and then quenched and tempered. Smoothed and chemically treated. SGCC material is harder than SECC material, has poorer ductility (avoid deep drawing design), thicker zinc layer, and poorer weldability.
4. Stainless steel SUS304
One of the most widely used stainless steels. Because it contains Ni (nickel), it is more corrosion-resistant and heat-resistant than steel containing Cr (chromium). It has very good mechanical properties, no heat treatment hardening phenomenon, and no elasticity.
5. Stainless steel SUS301
The content of Cr (chromium) is lower than that of SUS304, and its corrosion resistance is poor. However, after cold working, it can obtain good tensile strength and hardness in stamping processing, and has good elasticity. It is mostly used for springs and EMI prevention.
