Light steel villa materials: mainly made of light steel sheet through the equipment cold bending to form a C-shaped light steel keel, from the light steel keel to form the skeleton of the house, referred to as light steel structure house or light steel villa.
The strength of steel refers to the hardness of steel, the higher the value, the stronger the strength, strength is also referred to as yield strength, sometimes is not the higher the strength is better, sometimes consider the processing need to choose different degrees of strength, such as the processing of tensile action, high strength steel will crack.
Light steel coating is divided into galvanized and aluminized zinc two kinds:
Galvanizing: how much content, mainly look at the value, light steel villas generally use zinc 275 grams and 300 grams, the value is the content of a square generation of zinc, the higher the content, the thicker the zinc layer.
Galvanizing physical changes: Galvanizing is exposed and reacts with oxygen in the air all the year round, and the surface will be black.
Aluminum and zinc plating: AZ150 for short, aluminum and zinc plating is galvanized anticorrosion 2-6 times, aluminum and zinc plating keel long-term naked surface has no color change, such as chemical corrosion, physical reaction occurs on the surface of the keel, the formation of aluminum protective film on the surface of the keel, so that the outside chemical substances and keel separated, protect the keel body material, prevent rust.
G550 aluminized zinc commonly used mechanical properties and physical parameters are as follows:
Name yield strength elastic modulus bulk density thermal expansion coefficient
G550 550MPa 2.06X105 N/mm 2 7.85g/cm 3 1.2×10-5℃
The corrosion resistance of “aluminized zinc coil” comes from the barrier protection of aluminum and the sacrificial protection of zinc.When zinc is sacrificed to protect the cut edges, scratches, and scratches of the coating, aluminum forms an insoluble oxide layer that acts as a barrier.Aluminized zinc alloy steel coils have been subjected to outdoor exposure tests for more than 20 years in various atmospheric environments, and it has been proved that the cutting edge protection of aluminized zinc steel sheets is much better than that of galvanized steel sheets.
Hot aluminized zinc steel plate is a kind of cold-rolled steel plate with various strength and thickness specifications as the base material. It is a pre-coated steel plate obtained by hot plating a layer of Al-Zn coating on both sides. The mass percentage of coating composition is about 55%Al (aluminum), 43.5% Zn (zinc), 1.5%Si (silicon).Combines Al physical protection and electrochemical protection feature, high durability and zinc material has the strength of the substrate steel and plastic, and corrosion resistance of the coating, it can protect the metal substrate internal no longer from corrosion, in addition, on the surface of shining silver loading rules with high ornamental pattern, and has a sense of relief.
G550+AZ150 performance introduction:
Heat resistance:
The heat resistance of aluminized zinc alloy steel plate is better than that of galvanized steel plate, and it is resistant to high temperature oxidation. Aluminized zinc can be used in high temperature environment up to 315 degrees.
Reflexibility:
Aluminized zinc has a high reflectivity, which makes it a thermal barrier;The thermal reflectivity of aluminized zinc is almost twice that of galvanized zinc, so it can be used as the main structure of a house under normal circumstances to achieve energy saving.
Aluminum plated zinc steel plate test:
Comparative tests of coated steel plates in industrial areas of Pennsylvania, USA:
Aluminum zinc plated steel plate after 30 years about no rust trace, low-rise cold-formed thin-walled steel building is the main steel structure is all sealed in the wall, so the main structure can be used for more than 100 years
Quality assurance:
Machinability: to meet the requirements of rolling, stamping, bending and other forms of processing.
Corrosion resistance (compared with hot dip galvanized) : hot dip galvanized steel plate has excellent corrosion resistance, the service life is the same coating thickness of ordinary galvanized steel plate 2-6 times.
Reflectance: the ability to reflect heat and light is 2 times that of hot-dip galvanized steel plate, and the reflectance is greater than 0.70, which is better than the 0.65 stipulated by EPA Energy Star. It is an ideal energy-saving building material.
heat resistance: ordinary hot dip galvanizing products usually use temperature does not exceed 230℃, 250℃ will discolor, and aluminized zinc plate can be used in 315℃ environment for a long time without discoloration.The color change of the aluminum-zinc plated steel plate treated by heat passivation at Baosteel is less than that of the aluminum-plated steel plate and the aluminum-plated steel plate after 120 hours at 300℃.
Post time: Jul-02-2021