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What are the material applications for custom sheet metal enclosures?

03-02

A wide variety of metal sheet materials are used in stamping. Which metal sheets are widely used in the electronics and electrical industries?

1. Common cold-rolled thin sheet SPCC

SPCC refers to the process of continuously rolling steel ingots on a cold-rolling mill to produce steel coils or steel sheets of the desired thickness. Custom sheet-metal enclosures made from SPCC have an unprotected surface that is prone to oxidation when exposed to air. This oxidation accelerates in humid environments, leading to the formation of dark-red rust. During use, the surface should be coated with paint, electroplated, or otherwise protected.

2. Galvanized steel sheet SECC

SECC is made from ordinary cold-rolled steel coil. On a continuous electro-galvanizing production line, it undergoes degreasing, pickling, electro-galvanizing, and various post-treatments to become an electro-galvanized product. SECC not only exhibits the mechanical properties and similar formability of ordinary cold-rolled steel sheet but also boasts superior corrosion resistance and an aesthetically pleasing finish. As a result, it is highly competitive and readily substitutable in the electronics, home appliance, and furniture markets. For example, SECC is widely used in computer cases.

Custom Sheet Metal Enclosures

3. Hot-dip galvanized steel sheet SGCC

SGCC refers to hot-rolled, pickled, or cold-rolled semi-finished steel that is cleaned, subjected to thermal reduction, immersed in a molten zinc bath at 460°C for zinc coating, then quenched and tempered, leveled, and chemically treated. Compared with SECC, SGCC material is harder and less ductile (therefore unsuitable for deep-drawing applications), has a thicker zinc coating, and exhibits poorer weldability.

4. Custom stainless steel SUS301 sheet metal enclosure

Cr (chromium) content is lower than that of SUS304, resulting in poorer corrosion resistance; however, after cold working, it can achieve good tensile strength and hardness, as well as excellent elasticity. It is primarily used for leaf springs and other spring applications.

5. Stainless steel SUS304

Austenitic stainless steel is one of the most widely used types of stainless steel. Due to its nickel content, it exhibits superior corrosion resistance and heat resistance compared with chromium-containing steels. It also boasts excellent mechanical properties, does not harden through heat treatment, and lacks significant elastic recovery.

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What are the characteristics of custom stamping for sheet-metal enclosures at a sheet-metal fabrication plant in Suzhou?

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