In order to popularize knowledge and gain a better understanding, today we will introduce the various properties of G550 aluminum zinc plated steel:

Light steel villa material: mainly composed of light steel panels that are cold-formed by equipment to form a C-shaped light steel keel. The framework of the house is composed of light steel keel, abbreviated as light steel structure house or light steel villa. The strength of steel refers to the hardness of the steel. The higher the value, the stronger the strength, also known as yield strength. Sometimes, the higher the strength, the better. Sometimes, considering the processing needs, different degrees of strength are selected. For example, if there is a tensile action during processing, high-strength steel will crack!

Steel includes G235, G345, and G550 steel, which is commonly used in international standards. Light steel coatings are divided into two types: galvanized and aluminum zinc coatings:
Galvanization: The content mainly depends on the numerical value. Light steel villas generally use zinc content of 275 grams and 300 grams, which is equivalent to the zinc content of one square meter. The higher the content, the thicker the zinc layer.
Physical changes in zinc plating: Zinc plating reacts with oxygen in the air when exposed year-round, and the surface will turn black.
Aluminum zinc plating: abbreviated as AZ150, aluminum zinc plating is 2-6 times more anti-corrosion than galvanizing. The aluminum zinc plated keel has no color change on the surface when exposed for a long time. If it is corroded by chemical substances, physical reactions occur on the surface, forming an aluminum protective film on the surface of the keel, separating external chemical substances from the keel, protecting the main material of the keel and preventing rust.

The common mechanical properties and physical parameters of G550 aluminum zinc plating are as follows:
Name: Yield strength, elastic modulus, bulk density, coefficient of thermal expansion
G55050Mpa 2.06X105N/mm27.85g/cm31.2 × 10-5 ℃

The corrosion resistance of aluminum zinc coated steel coils comes from the barrier layer protection function of aluminum and the sacrificial protection function of zinc. When zinc is used as sacrificial protection in cut edges, scratches, and coating abrasions, aluminum forms an insoluble oxide layer, playing a barrier protection function. Aluminum zinc alloy steel coils have undergone over 20 years of outdoor exposure tests in various atmospheric environments, confirming that the edge protection function of aluminum zinc coated steel plates is much better than that of galvanized steel plates.

Hot dip aluminum zinc steel plate is a pre coated steel plate made from cold-rolled steel plates of various strength and thickness specifications. It is coated with a layer of Al Zn coating on both sides, with a mass percentage of about 55% Al (aluminum), 43.5% Zn (zinc), and 1.5% Si (silicon) in the coating. It combines the physical protection and high durability of Al with the electrochemical protection characteristics of Zn. The material has the strength and plasticity of the substrate steel, as well as the corrosion resistance of the coating. It can protect the interior of the metal matrix from corrosion. In addition, the surface presents a bright silver gray color and regular patterns with high decorative properties, and has a floating convex feeling.

Performance introduction of G550+AZ150:

1. Heat resistance:
Aluminum zinc alloy steel plate has better heat resistance and high-temperature oxidation resistance than galvanized steel plate. Aluminum zinc coating can be used in high-temperature environments up to 315 degrees Celsius.

2. Reflectivity:
Aluminum zinc plating has a high reflectivity, making it a barrier against heat; The thermal reflectivity of aluminum zinc plating is almost twice that of zinc plating, so it can achieve energy-saving effects as the main structure of a house under normal circumstances.

Aluminum zinc coated steel plate test:

Comparative tests on coated steel plates conducted in industrial areas of Pennsylvania, United States:
After 30 years, the aluminum zinc coated steel plate has no rust marks. Low rise cold-formed thin-walled steel buildings seal the main steel structure inside the wall, so the main structure can be used for more than 100 years

Quality Assurance

1. Workability: Meet the requirements of rolling, stamping, bending, and other forms of processing.
2. Corrosion resistance (compared to hot-dip galvanizing): Hot dip aluminum zinc steel plate has excellent corrosion resistance, and its service life is 2-6 times that of ordinary galvanized steel plate with the same coating thickness.
3. Reflectivity: The ability to reflect heat and light is twice that of hot-dip galvanized steel plate, with a reflectivity greater than 0.70, better than the 0.65 specified by EPA Energy Star, making it an ideal energy-saving building material.
4. Heat resistance: Ordinary hot-dip galvanized products are usually used at temperatures not exceeding 230 ℃, and will change color at 250 ℃, while aluminum zinc plated plates can be used for a long time in an environment of 315 ℃ without changing color. The color change of Baosteel heat-resistant passivated aluminum zinc plated steel plate is smaller than that of aluminum plate and aluminum plated plate after 120 hours in a 300 ℃ environment.