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GI is typically refers to galvanized sheet or coil which is defined as a carbon steel sheet coated with zinc on both sides. Continuous hot dipping, or electro-galvanizing are the two processes used to produce galvanized sheet and coil. Generally speaking, the hot dip process consists of passing the steel through a bath of molten zinc. The electro-galvanizing process consists of the application of zinc by electrolytic disposition. The result is a layer of zinc tightly adhering to the base metal through an iron-zinc bonding layer.
A zinc coating is one of the most effective and economical methods of protecting bare steel from a corroding environment. The zinc not only serves as a barrier between the steel and the environment, it will sacrifice itself to protect the underlying steel sheet. Sacrificial, or galvanic protection occurs when two dissimilar metals are in contact and coupled with water and oxygen. Zinc corrodes preferentially to the iron in steel. This protection prevents corrosion of the steel at areas not covered with zinc. Thus, the spread of corrosion from cut edges, drill holes, etc. is minimized.
GL is same process as GI while coated with galvalume. The combination of zinc and aluminum in Galvalume enhances both the positive and negative effects of aluminum. Galvalume has barrier corrosion resistance and heat resistance similar to aluminized material and good bare edge galvanic protection and forming qualities like galvanized material. Consequently, Galvalume and Galvalume Plus will resist rust, the elements and fire while providing a sturdy and protective covering. Galvalume is more corrosion-resistant than galvanized steel, but because aluminum provides barrier protection instead of galvanic protection, scratches and cut edges are less protected. Galvalume is offered in both bare and pre-coated versions. Most Galvalume –like galvanized steel– is coated. But Galvalume has an excellent performance life in bare exposures as well. Both galvanized steel and Galvalume steel sheet weigh 100 to 150 pounds per 100 square feet and contain about 35% recycled materials. The cost of Galvalume and Galvalume Plus are about the same as that of galvanized steel.The coating used on Galvalume is very important because it is critical to the length and conditions of the entire warranty of the panel product. Coated metal roof panels have progressed from a single coat straight polyester paint system in the early years to Poly vinyl idene fluoride(PVDF) acknowledged as the premium resin for coil coatings. PVDF resin has superior chalk resistance and gloss retention as well as stain and chemical resistance. It is softer than polyester, making it highly formable without risk of cracking. Current pretreatments and primers along with superior paint coating have increased product warranties dramatically.
GI COIL / GALVANIZED STEEL COIL
High Quality Prime SGCC Electro Hot Rolled Galvanized Steel
Sheet/ Coil/ GI/ HDGI For Corrugated Steel
|Brand||1mm thickness hot dipped galvanized steel coil price|
|Type||Galvanised steel coil/coated steel coil|
600mm to 1500mm Nippon Paint Prepainted Galvanized Steel
|Thickness(W.T)||0.2mm to 4.0mm|
|Section shape :||Coil / sheet|
|Standard||ASTM A653/ A792 JIS3302 SGCC etc|
|Raw material :||Cold rolled|
|Technique :||Hot dipped galvanized steel coil|
|Tolerance of width||±0.1mm or +/-5%|
|Length||Steel coil, 3-8ton per coil|
|Sheets: For exporting length , generally, 5-5.8m for 20ft container.|
|Sheets: exporting and fixed length , generally , 6-12m for 40ft container.|
|Also could be fixed length like 5.8m, 6m, and 11.8m as per your request.|
Galvanized steel roll/sheet /metal coils/coating features:
1. Zinc coating :60-275g/m2( as required)
3. Width:600-1500mm(900mm,1215mm,1250mm,1000mm the most common)
4. Coil id:508mm
5. Coil weight: 3-5MT(as required)
6. Surface:regular/mini/zero spangle, chromated, skin pass, dry etc.
7. Application: With excellent cold bending molded manufacturablity, good decoration effect, strong anti-corrosion ability, galvanized steel coils and sheets are also pollution-free and easily recycled. Accordingly, they can be used as final products and basic plates of color coated steel coils and widely applied in construction, home appliances, decoration, ect.
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Founded in 2001, China Steel New Material is well-known as one of the top 10 steel structure brands in China. With the aid of advanced technology and equipment, our suppliers can offer you quality and stable anti-finger galvanized steel metal coils steel rolls for steel products at low price. Please be free to place an order, we will offer you the best service and timely delivery.