What are the commonly used sheet metal materials and surface treatments?

1. Cold-rolled sheet, referred to as SPCC, as the most basic sheet metal material, is widely used.
Advantages: low cost, easy to form
Disadvantage: easy to rust
2. Galvanized sheet, referred to as SECC/SGCC, SECC electrolytic sheet is divided into N material and P material. N material usually does not do surface treatment, and the cost is high. P material is used for sprayed parts.
Advantages: anti-corrosion, easy to form
Disadvantage: high cost
3. Hot-rolled sheet, referred to as SPHC, belongs to the low-end rust-prone material, the thickness is generally above 3mm, the cost is low, but it is difficult to form, and it is usually used as a hinge product.
Advantages: low cost,
Disadvantages: difficult to form, easy to rust
4. Copper is mainly used as wires, cables, and other conductive equipment. The surface can be plated with nickel and chrome, but because of the high cost, the surface is usually not treated.
Advantages: good electrical conductivity, good thermal conductivity, good corrosion resistance (in dry air), good strength, etc.
Disadvantages: high density, heavyweight, a layer of patina will be formed in a humid environment.
5. Stainless steel, commonly used SUS304, because of its good anti-rust and anti-corrosion properties, the surface is usually not treated. Such as sinks and gas cooktops.
6. Aluminum plate or aluminum alloy, with low density, forms an oxide film on the surface in a natural state, anti-corrosion, and is widely used in aviation, aerospace, automobiles, ships, etc.
Advantages: low density. Lightweight, good electrical and thermal conductivity, good corrosion resistance, low-temperature resistance, etc.
Disadvantages: pure aluminum is soft and slightly weak in strength, and cannot be used for main bearing parts.
Common surface treatment: oxidation, mechanical drawing, batch flowers, etc.