The yield strength of low alloy high strength structural steel is much higher than that of carbon steel with the same carbon content, and it has good comprehensive mechanical properties. The yield strength value generally specified is above 300MPa and below 460MPa.

1. Polyester coating (PE): It has good weather resistance and decorative properties, and is suitable for outdoor building exterior walls, roofs, and other environments. Polyester-coated color-coated aluminum coils are brightly colored and resistant to ultraviolet radiation, but their high-temperature resistance is relatively weak.

2. Fluorocarbon coating (PVDF): It uses fluorocarbon resin as the base material, has extremely high weather resistance, corrosion resistance, and chemical resistance, and can maintain bright colors and stable performance even under extreme climatic conditions. It is a material for high-end building curtain walls and billboards.

3. Acrylic coating (AC): It is between polyester and fluorocarbon, has good weather resistance and cost-effectiveness, and is suitable for mid-range building decoration and home appliance housings.

4. Nano coating: A new coating technology that has emerged in recent years. Through nanotechnology, the coating material is refined to the nano level, which significantly improves the hardness, wear resistance, self-cleaning, and antibacterial properties of the coating, opening up new areas for the application of color-coated aluminum coils.

Galvanized steel is generally covered with a zinc layer on the surface of the steel plate to prevent corrosion. However, in some places with high humidity and humid climates, the protective ability of the zinc layer may be damaged, resulting in the formation of white zinc oxide on the surface, which is the cause of white rust.
1. High air humidity
2. Low oxygen content in the air, such as a high proportion of acidic gases in the environment
3. Direct contact with other metals
4. Packaging when drying is not thorough
5. Mechanical damage caused by storage extrusion.