What are the Common Materials Used in Sheet Metal Processing?

The materials generally used in sheet metal processing are galvanized steel, cold rolled steel, hot rolled steel, stainless steel, aluminum, aluminum alloy, and aluminized steel. Depending on the role of the product, the materials used are also different. It is mainly considered from the purpose and cost of the product. Today, I will briefly introduce several commonly used materials for sheet metal processing.

1. Galvanized steel sheet SECC

The substrate of SECC is ordinary cold-rolled steel coil, which becomes electro-galvanized product after degreasing, pickling, electroplating and various post-treatment processes on the continuous electro-galvanizing production line. SECC not only has the mechanical properties of general cold-rolled steel sheet and similar sheet metal workability, but also has superior corrosion resistance and decorative appearance. It is highly competitive and replaceable in the market of electronic products, home appliances and furniture. For example, SECC is commonly used in computer cases.

2. Cold rolled steel SPCC

SPCC refers to the continuous rolling of steel ingots through cold rolling mills into steel coils or sheets of required thickness. There is no protection on the surface of SPCC, and it is easily oxidized when exposed to the air. Especially in a humid environment, the oxidation speed is accelerated, and dark red rust is easy to appear. So the surface should be painted, electroplated or take other protection methods when you put it into use.

3. Hot-dip galvanized steel SGCC

Hot-dip galvanized steel coil refers to the semi-finished product after hot-rolling and pickling or cold-rolling, which is cleaned and annealed, and then immersed in a molten zinc bath at a temperature of about 460°C, so that the steel sheet is coated with a zinc layer and then quenched. It is made by leveling and chemical treatment. SGCC material is harder than SECC material, and it has poor ductility, thicker zinc layer, and poor electric weldability.

4. Stainless steel SUS304

Stainless steel SUS304 is one of the most widely used stainless steels. Because it contains nickel, it has better corrosion resistance and heat resistance than chromium-containing steel. It has very good mechanical properties, and it doesn't have heat treatment hardening phenomenon and it has no elasticity.

5. Stainless steel SUS301

The content of chromium in stainless steel SUS301 is lower than that of SUS304, and its corrosion resistance is poor. However, after cold working, it can obtain good tensile force and hardness in sheet metal processing, and has good elasticity. It is mostly used for shrapnel and spring.