1. Galvanized steel sheet SECC
The base material of SECC is a general cold-rolled steel coil. After degreasing, pickling, electroplating and various post-treatment processes in the continuous electrogalvanizing production line, it becomes an electrogalvanized 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 has great competitiveness and substitutability in the market of electronic products, home appliances and furniture. For example, SECC is commonly used in computer cases.
2. Ordinary cold-rolled sheet SPCC
SPCC refers to steel ingots that are continuously rolled into steel coils or sheets of required thickness by cold rolling mills. The surface of SPCC has no protection and is easily oxidized when exposed to the air. Especially in a humid environment, the oxidation speed is accelerated, and dark red rust appears. When in use, the surface must be sprayed with paint, electroplated or otherwise protected.
⒊ Hot-dip galvanized steel sheet SGCC
Hot-dip galvanized steel coil refers to the semi-finished product after hot-rolled pickling or cold-rolled, which is washed, annealed, immersed in a molten zinc bath at a temperature of about 460°C, and the steel sheet is coated with a zinc layer, and then tempered, leveled and chemically treated. SGCC material is harder than SECC material, has poor ductility (avoid deep drawing design), thicker zinc layer, and poor electric 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), has very good mechanical properties, no heat treatment hardening phenomenon, and no elasticity.
5. Stainless steel SUS301
The Cr (chromium) content is lower than SUS304, and the corrosion resistance is poor, but after cold processing, it can obtain good tensile force and hardness in stamping processing, and has good elasticity. It is mostly used for springs and EMI protection.
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