Sheet metal material
There are a lot of sheet metal materials suitable for stamping. Sheet metal materials widely used in electronic and electrical industry include:
⒈ the common cold-rolled plate SPCC refers to the continuous rolling of steel ingot into the required thickness of steel coil or sheet. SPCC surface without any protection, exposed to the air is very easy to be oxidized, especially in humid environment, oxidation speed is accelerated, dark red rust appears, the surface should be painted, electroplated or other protection.
2. The base material of SECC SECC galvanized steel sheet is a common cold-rolled steel coil. After degreasing, pickling, electroplating and various post-treatment processes in the continuous electro galvanizing production line, it becomes the electro galvanized product. SECC not only has the mechanical properties and approximate processability of general cold-rolled steel sheet, but also has superior corrosion resistance and decorative appearance. In the market of electronic products, home appliances and furniture, it is very competitive and replaceable. For example, SECC is widely used in computer cases.
3. Hot dip galvanized steel sheet SGCC hot-dip galvanized steel coil refers to the semi-finished products after hot-rolled pickling or cold-rolled, which are cleaned and annealed, immersed in the solution zinc bath at about 460 ° C, and the steel sheet is coated with zinc layer, and then quenched, tempered, leveled and chemically treated. SGCC material is harder than SECC material, with poor ductility (avoiding deep drawing design), thicker zinc layer and poor weldability.
4. The content of Cr (CR) in SUS301 is lower than that in SUS304, and its corrosion resistance is poor. However, after cold working, it can obtain good tensile strength and hardness, and has good elasticity. It is mostly used in spring spring and anti EMI.
5. Stainless steel SUS304 is one of the most widely used stainless steels. Because it contains Ni (nickel), it is more corrosion-resistant and heat-resistant than the steel containing Cr (CR). It has very good mechanical properties, no heat treatment hardening phenomenon and no elasticity.