Galvanized steel coils achieve corrosion resistance by coating the steel sheet with zinc, thereby extending the coil's service life. Galvanizing is the most commonly used anti-corrosion treatment in steel processing. Galvanized coils can be categorized as hot-dip galvanized and electro-galvanized, depending on the galvanizing process.
Galvanized coils offer excellent corrosion resistance. When the steel sheet surface is damaged, the zinc layer corrodes away first, forming a dense oxide layer that prevents oxidation. Galvanized coils also exhibit excellent processability, suitable for bending, stamping, welding, and other processes. The cost of galvanizing is lower than that of stainless steel, and maintenance is simplified, resulting in a more cost-effective overall performance. Galvanized coils offer aesthetically pleasing surfaces, including glossy, matte, and fingerprint-resistant finishes, combining both aesthetic and functional qualities.
Galvanized steel coils are primarily used in the construction, automotive, home appliance, industrial, and electronic equipment industries.
Product Parameters
| Name | SGC400 Galvanized Steel Coil |
| Standard | GB,JIS,DIN,AISI,ASTM etc |
| Grade | SPCC,SPCD,SPCE,ST12-15,DC01-06,Q195A-Q235A,Q195AF-Q235AF,Q295A(B)-Q345A(B) DX53D+Z/DC53D+Z/DX54D+Z/DC54D+Z etc |
| Thick | 0.12-0.2mm or Customer needs customization |
| Width | 600-1500 mm or Customer needs customization |
| Length | 2000-12000mm or customized |
| Zinc Coating | 30-275g/m2,G30/G40/G60/G90/G120 |
| Coil Weight | 3-5 Tons |
| Hardness | Soft hard(HRB60),medium hard(HRB60-85),full hard(HRB85-95) |
| Surface Treatment | Chromated/Non-Chromated, Oiled/Non-oiled, Skin pass |
| Payment Terms | T/T, D/A, D/P, L/C, Western Union, MoneyGram or according to customer requirements |
| Regular Order | 25 tons or one container, for less quantity, to contact with us for details |
| MOQ | 3 ton |
| Delivery Time | Usually within 7 days, the time depends on the number of products. |
| Packing | Plastic film + water proof paper + steel plate+ packing steel strip,Customer needs customization |
| Application | Container Plate,Boiler Plate,Building materials,Flange Plateand so on |
Galvanized coil, the thin steel plate is dipped into the melted zinc tank, so that its surface adheres to a layer of zinc thin steel plate. It is mainly produced by continuous galvanizing process, that is, the rolled steel plate is continuously dipped in the plating tank with melted zinc to make galvanized steel plate. Alloyed galvanized steel sheet. This steel plate is also made by hot dipping, but immediately after the tank is heated to about 500 ° C, so that it generates an alloy coating of zinc and iron. This galvanized coil has good coating adhesion and weldability.
Galvanized Surface Selection
| Zero Spangle | Minimized Spangle | Normal Spangle | Large Spangle |
Chemical Composition
|
Standard |
Grade |
C |
Si |
Mn |
P |
S |
Ti |
|
Forcold Forming Chinese Standard |
DX51D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
DX52D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX53D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX54D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX56D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX57D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
Forcold Forming Japanese Standard |
SGCC |
0.15 |
0.50 |
0.80 |
0.050 |
0.030 |
0.025 |
|
SGCD1SGCD2 |
0.120.10 |
0.500.50 |
0.600.45 |
0.0400.030 |
0.0300.030 |
0.0250.025 |
|
|
SGCD3 |
0.08 |
0.50 |
0.45 |
0.030 |
0.030 |
0.025 |
|
|
SGCD4 |
0.06 |
0.50 |
0.45 |
0.030 |
0.030 |
0.025 |
|
|
For Structure Japanese Standard |
SGC340 |
0.25 |
0.50 |
1.70 |
0.200 |
0.035 |
0.025 |
|
SGC400SGC440 |
0.250.25 |
0.500.50 |
1.702.00 |
0.2000.200 |
0.0350.035 |
0.1500.150 |
|
|
SGC490 |
0.30 |
0.50 |
2.00 |
0.200 |
0.035 |
0.025 |
|
|
SGC510 |
0.30 |
0.50 |
2.50 |
0.200 |
0.035 |
0.025 |
|
|
For Structure AISI Standard |
S220GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
S250GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
|
S280GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
|
S320GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
|
S350GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.150 |
|
|
S550GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.150 |
The production process of galvanized coil mainly includes the following steps: steel coil pickling, cleaning, pretreatment, baking, zinc dipping, cooling, coil formation and so on. Put the steel coil to be galvanized into the acid solution for pickling, after pickling, the surface of the steel coil will remain acid, chloride ions and other harmful substances, need to use water to wash, put the cleaned steel coil into the pretreatment tank for surface treatment, the surface of the steel coil will have a protective film, the steel coil into the molten zinc solution for dipping and plating, in order to achieve the ideal galvanized quality. Cooling is carried out to make the zinc layer on the surface of the steel coil solidify quickly to ensure the quality of the coating.
In order to ensure product quality, we will arrange professional personnel to check product quality, packaging, weight, hardness, etc., according to customer requirements of product specifications, looking for high-quality and cheap cooperative factories in China, to provide customers with one-stop procurement services and quality assurance.
Mechanical Properties
|
Grade |
Yield Strength MPa≥ |
Tensile Strength MPa≥ |
Elongation A%≥ |
|
DX51D Z/ZM/AZ/AM |
240-380 |
270-500 |
22 |
|
DX52D Z/ZM/AZ/AM |
140-300 |
270-420 |
26 |
|
DX53D Z/ZM/AZ/AM |
140-260 |
270-380 |
30 |
|
DX54D Z/ZM/AZ/AM |
120-220 |
260-350 |
36 |
|
S220GD Z/ZM/AM |
220 |
300 |
20 |
|
S250GD Z/ZM/AZ/AM |
250 |
330 |
19 |
|
S280GD Z/ZM/AM |
280 |
360 |
18 |
|
S300GD A/AM |
300 |
380 |
18 |
|
S320GD Z/ZM/AM |
320 |
390 |
17 |
|
S350GD Z/ZM/AZ/AM |
350 |
420 |
16 |
|
S450GD A/AM |
450 |
480 |
15 |
|
S550GD Z/ZM/AZ/AM |
550 |
550 |
- |
Excellent packaging: waterproof paper and plastic film + iron cover + at least three strapping straps + strapping straps fixed on iron or wood pallets can effectively protect products from corrosion and various climate changes during transportation. Generally speaking, we ship from Shanghai, Tianjin, Qingdao and Ningbo ports. We have worked with many experienced shipping companies for a long time to find the most suitable mode of transportation for you.
