Common Materials for Sheet Metal Fabrication
1. Galvanized Steel Sheet (SECC)
SECC steel is made from standard cold-rolled steel coils. After undergoing degreasing, pickling, electroplating, and various post-treatment processes on a continuous electrogalvanizing line, it becomes an electrogalvanized product. SECC not only possesses the mechanical properties and similar workability of standard cold-rolled steel sheet, but also offers superior corrosion resistance and a decorative appearance. It is highly competitive and a viable alternative in the electronics, home appliance, and furniture markets. For example, computer cases are commonly made of SECC.
2. Standard Cold-Rolled Steel Sheet (SPCC)
SPCC steel is produced by continuously rolling steel ingots into coils or sheets of the required thickness in a cold rolling mill. SPCC has no surface protection and is easily oxidized when exposed to air. This oxidation rate is particularly accelerated in humid environments, resulting in the development of dark red rust. Therefore, the surface must be painted, electroplated, or otherwise protected before use. 3. Hot-Dip Galvanized Steel (SGCC)
Hot-dip galvanized steel coils are made by cleaning, annealing, and immersing the semi-finished product in a molten zinc bath at approximately 460°C to coat the steel with a zinc layer. The steel is then tempered, leveled, and chemically treated. SGCC is harder and less ductile than SECC (Seccd) steel (preventing deep drawing). The zinc layer is thicker and has poorer weldability.
4. SUS304 Stainless Steel
One of the most widely used stainless steels, it contains nickel (nickel), making it more corrosion-resistant and heat-resistant than steels containing chromium (chromium). It possesses excellent mechanical properties, exhibits no heat-hardening, and lacks elasticity.
5. SUS301 Stainless Steel
It has a lower chromium (chromium) content than SUS304 and exhibits lower corrosion resistance. However, after cold working, it can achieve excellent tensile strength and hardness during stamping, resulting in excellent elasticity. It is often used in leaf springs and EMI shielding.
September 11, 2025
