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4."55% Aluminum-Zinc Coated Steel Sheet(Super Galum)
Heat Resistance Test Results
Test conditions: Naked eye comparison the sheet after two rounds of test procedures (Heating (1.5 Hr), maintaining (5 Hr), cooling (17 Hr))
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Superior Heat Resistance
Lengthy exposure to temperatures up to 450 degrees Celsius causes very little change in ALCOT and does not affect its attractive surface brightness, compared with galvanized steel
sheet and cold-rolled steel sheet.
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Hot-dip aluminum coated steel sheet combines the mechanical properties of cold-rolled steel sheet with aluminums high resistance retention, heat reflection, and superior rust
resistance. Steel Company produces hot-dip aluminum coated steel sheet under the brand name ALCOT.
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Improvements in powdering
The FeZn alloy layer generally displays a high level of hardness and low ductility, causing the alloy layer on the surface to peel off as powder during deep drawing. Dongbu Steels
#3CGL uses the high frequency induction heat method during the heat treatment that follows the coating phase, which drastically lowers the degree of powdering, presenting an
elegant steel surface.
Powdering can be improved if a low coating material (F 10 or lower) is used during deep drawing.
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Superior paint adhesiveness and corrosion resistance
The rough alloy layers of the galvannealed sheet surface facilitates the reaction to the pre-treatment (phosphate and chromate treatment), improving paint adhesiveness and
corrosion resistance.
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Greater peeling resistance
Due to exceptional paint adhesiveness resulting from the formation of alloy layers, the peeling resistance during the bending and folding treatment is greatly enhanced, compared
to regular hot-dipped sheet.
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Superior weldability
The weldability of galvanized sheet is drastically compromised because of the absorption of zinc coating onto the welding electrode. Galvannealed plates have significantly
improved weldability because of the high melting point of FeZn alloy on the surface, which prevents electrode contamination.
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Galvannealed steel sheet offers significant improvements in weldability and paintability by undergoing a simple pre-treatment process. After the coating process a special heat
treatment forms an alloy layer between the galvanized layer and the metal base.
Product Features
2."Fe-Zn Galvannealed Steel Sheet(GA)"
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Consistent Quality
Production is carried out using a rigorous quality control process and a strict quality inspection based on high quality production standards. As a result, product quality,
dimensions, and other properties strictly conform to customer demand.
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Excellent Corrosion Resistance
All galvanized steel sheet is treated with chromic acid for protection against rust, to maintain original surface luster for a longer period.
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Superior Formability
Highly workable steel sheet and strips are used as base metals for all galvanized steel sheet produced at the Cold Rolling Facility. The base metals in coil are continuously
annealed, galvanized, and properly leveled. The galvanized sheet provides superior formability with base metals.
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Continuous Galvanization
Using techniques perfected by years of experience, hot-dip galvanized steel sheet is formed on a line that is continuously galvanizing to guarantee smooth, high quality end
products.
Steel Company is committed to offering galvanized steel sheet with a broad range of base metal qualities, including commercial, lock forming, drawing, and structural quality.
Moreover, each product undergoes a chromatic process for protection against rust.
Product Features
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1."Hot Dip Galvanized Steel Sheet(GI)"
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