Description of Galvalume Steel Coil
Aluminized zinc steel coil is made of cold rolled steel sheet as the base material and is made of 55% aluminum, 43.4% zinc and 1.6% silicon cured at 600°C. It combines the physical protection and high durability of aluminum with the electrochemical protection of zinc. It is also known as aluminum-zinc alloy steel coil.
Specification of Galvalume Steel Coil
| Product name | Galvalume Steel Sheet in Coil |
| Material | CGCC, DX51D,Q195,Q235 |
| Grade | SGCC,DX51D+Z |
| Alu-Zinc Coating | 20-120g/m2 |
| Thickness | 0.13-0.7 mm |
| Width | 600-1250 mm |
| Coil ID | 508/610mm |
| Coil weight | 3-8tons |
| Surface Structure | Mini/Big Spangle |
| Surface Treatment | Anti-Finger printing ,Chromated, oiled/ non-oiled |
| Package | standard export package (Detailed picture is as follows) |
| Hardness | soft (normal), hard, full hard(G300-G550) |
| HS code | 721049 |
| Country of origin | China |
| Business type | Supplier and manufacturer |
| Brand name | COSASTEEL |
Application of Galvalume Steel Coil
Unique protective properties and affordability make Lapham-Hickey’s galvanized steel coils and sheets ideal for a wide range of applications, including but not limited to
- Residential and commercial exterior construction products
- Roofing
- Wall panels
- Cabinets
- Air conditioning and heating equipment
- Electrical boxes
- Farm equipment and machinery
- Furnace components
- Guide rails
- Home appliances
The difference between galvanized and electro-galvanized
The main difference lies in their coating. In the case of galvanized sheet, a layer of zinc material is distributed evenly over the surface of the galvanized sheet and provides active protection to the base metal; in other words, zinc serves as a substitute for corrosion protection of the base metal until it is torn off.
In contrast, the surface of the galvanized sheet is a coating consisting of 55% aluminum, 43.5% zinc, and some other elements, which look like a honeycomb structure under a microscope. In this case, although the coating of the galvanized sheet also plays its protective role as an anode plate, this protective effect decreases dramatically because the zinc content decreases and because the zinc is not easily electrolyzed when it is encased in aluminum.
Therefore, once the galvanized sheet is cut, the cut will generally lose its protective effect and will rust soon. Therefore, we should try to cut as little as possible, and once cut, use rust-proof paint or zinc-rich paint to protect the cut and prolong its life.
Advantages of galvanized steel
Can handle the heat. Performs well above 300°C.
Prevents corrosion. The aluminum layer provides protection for the interior of the steel.
Easy to paint. Galvanized steel provides perfect adhesion and gives you an attractive paint finish.