Blog #GL Galvalumed coil performance

1. Improve the surface flatness of high quality galvalume steel coating steel coil. After finishing, the flatness of the galvanized aluminum coil is improved, and the wave shape of the galvanized aluminum coil is partially eliminated, and the surface slag particles or other uneven spots can be flattened to make the surface smooth and flat. 

2. Adjust the roughness of the surface of the hot sale aluminum zinc steel coil. By controlling the roughness of the surface of the work roll of the finishing machine, the original uneven roughness of the surface of the galvanized aluminum plate can be unified to a certain range. This improves the paintability of the product and the lubricity during processing. 

3. Improve the surface color of high quality galvalume steel coating steel coils. For small zinc flower and zinc-free flower products, the galvanized aluminum plate can achieve a more uniform surface with gloss by finishing. For some private enterprises, the use of large zinc flower products as color-coated substrates can make the zinc flower bumps and different glosses formed by the large zinc flower crystals smooth and uniform, which makes the zinc flowers blurred and unfavorable. Cover the zinc flower when painting. 

4. Improve the processing of GL Galvalumed coil performance. By finishing, the yielding platform of the galvanized aluminum coil can be eliminated or become inconspicuous, and the metal slip line can be prevented from being generated in the subsequent processing.

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.