Aluminized Zinc Coil Vs Galvanized Steel Coil
GI steel coil with spangles in stock has been widely used in construction, home appliances and other major industries since its introduction. Due to the ever-expanding range of use, the product's formability and various properties of the steel sheet are continuously improved, and thus the aluminum-zinc-plated steel sheet which is superior to the hot-dip galvanized steel coil in some properties is produced. The hot sale aluminum zinc steel coil is an AL-Zn combined aluminum-zinc-plated steel sheet obtained by hot dip coating on a cold-rolled hard steel sheet of various strengths and thicknesses. The coating composition is 55% aluminum, 43.5% zinc, 1.5% silicon and appropriate trace elements.
GL Galvalumed coil performance is superior to hot-dip galvanizing in production and processing.
1. Processing performance
China aluminum zinc steel coil is similar in processing performance to hot-dip galvanizing, and can fully meet the requirements of rolling, stamping, bending and other forms of processing.
2. Corrosion resistance
The test was carried out under the premise of hot-dip galvanized steel sheets and galvanized steel sheets of the same thickness, plating and surface treatment. Aluminized zinc has excellent corrosion resistance than hot-dip galvanizing, and its service life is 2-6 times that of ordinary galvanized steel.
3. Light reflection performance
Aluminized zinc reflects twice the heat and light of galvanized steel and has a reflectance greater than 0.70, which is better than the 0.65 specified by EPA Energy Star.
4. Heat resistance
Ordinary hot-dip galvanizing products usually use a temperature not exceeding 230 degrees, 250 degrees will change color, and galvanized sheets can be used for a long time in a 315 degree environment without discoloration. In the environment of 300 degrees for 120 hours, the color change of the galvanized steel sheet treated by Baosteel heat-resistant passivation is much lower than that of aluminum and aluminized sheets.
5. Mechanical properties
The mechanical properties of aluminum zinc steel coil are mainly expressed in yield strength, tensile strength and elongation. Ordinary DC51D grade 150 g / square galvanized steel, the general yield strength is between 140-300mpa, tensile strength between 200-330, elongation between 13-25. The grade of DC51D+AZ galvanized 150g/sqf galvanized steel sheet yield strength between 230-400mpa, tensile strength between 230-550, and elongation rail between 15-45.
