What are the sheet metal materials used in automotive sheet metal processing?
Sheet metal materials used in automotive sheet metal processing include:
⒈Ordinary cold-rolled plate SPCC SPCC refers to steel ingots that are continuously rolled by a cold rolling mill into steel plate coils or sheets of required thickness. 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 is accelerated and dark red rust appears. The surface must be painted, electroplated or otherwise protected during use.
⒉ Galvanized steel sheet SECC The base material of SECC is general cold-rolled steel coils. After degreasing, pickling, electroplating and various post-processing processes 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.
⒊Hot-dip galvanized steel sheet SGCC Hot-dip galvanized steel coil refers to a semi-finished product that is hot-rolled, pickled or cold-rolled, cleaned, annealed, and immersed in a molten zinc bath with a temperature of about 460°C, so that the steel sheet is plated The zinc layer is then tempered, leveled and chemically treated. SGCC material is harder than SECC material, has poorer ductility (avoid deep drawing design), thicker zinc layer, and poorer weldability.
⒋Stainless steel SUS301 has lower Cr (chromium) content than SUS304 and has poorer corrosion resistance. However, it can obtain good tensile strength and hardness after cold processing, and has good elasticity. It is mostly used for springs and EMI prevention.
⒌Stainless steel SUS304 is one of the most widely used stainless steels. Because it contains Ni (nickel), it has better corrosion resistance and heat resistance than steel containing Cr (chromium). It has very good mechanical properties, no heat treatment hardening phenomenon, and no elasticity.
Real time news