Description
Product Description
GI Sheet Material Types
The commonly used galvanized steel grades are:
Commercial Sheet (CQ);
Forming Steel;
GI Sheet for Structural Use (HSLA);
Deep Drawing Steel Sheet (DDQ);
Extra Deep Drawing Steel (EDDS), etc.
How to Calculate GI Sheet Weight?
The GI sheet weight follows the calculation formula: W= Thickness (mm) * Width (m) * Length (m) * 7.85 (Density of steel = 7.85 kg/m3) + zinc layer weight
Taking gauge 18 GI sheets (G90) for example, the thickness is about 1.31 mm. The zinc layer is about 275 g/m2. So the galvanized sheet weight per square meter is about 10.58 kg. You can roughly get the weight. If your galvanized sheet is 0.7 mm in thickness, 1.2 m in width, and 2.5 m in length, the weight is about 16.5 kg/piece (0.7*1.2*2.5). If you order 50 tons, there will be about 3,000 pieces. You can estimate how many GI sheets are needed for your project easily.| SPECIFICATION PARAMETER |
| Commodity | Galvanized Steel Sheet |
| Grade | Q195, Q235 |
| SGCC, SGCH, SGC340, SGC400, SGC440, SGC490, SGC570 |
| SGHC, SGH340, SGH400, SGH440, SGH490, SGH540 |
| DX51D, DX52D, DX53D, DX54D |
| S220GD, S250GD, S280GD, S320GD, S350GD, S400GD, S500GD, S550GD |
| Standard: | AISI, ASTM, BS, DIN, GB, JIS |
| Zinc coated: | 30 g/m2-275 g/m2 |
| Spangle | Zero spangles (0.12-2.0 mm), 0.7-4 mm with small spangles, regular (big) spangles |
| Surface treatment | Chromated, oiled and anti-fingerprint |
| Thickness | 0.12-4.0mm |
| Width | 600-2000mm |
| Supply Ability | 40000MT/month |
| MOQ | 5MT |
| Packaging | Export standard, seaworthy |
| Substrate | Cold rolled, Hot rolled |
| ID | 508mm or 610mm |
| Certificates | SGS, BV, ISO 9001 |
| Trade Term | FOB, CFR, CIF |
| Payment terms | T/T, L/C at sight, West Union, D/P, D/A, Paypal |
| Delivery time | 14days after confirmed order |
| Loading port | Tianjin port |
| Container size | 20ft GP: 5898mm(Length)x2352mm(Width)x2393mm(High) |
| 40ft GP: 12032mm(Length)x2352mm(Width)x2393mm(High) |
| 40ft HC: 12032mm(Length)x2352mm(Width)x2698mm(High) |
| Galvanized Steel Sheet Gauge Chart |
| Gauge | mm | Inches |
| 8 | 4.27 | 0.1681 |
| 9 | 3.89 | 0.1532 |
| 10 | 3.51 | 0.1382 |
| 11 | 3.13 | 0.1233 |
| 12 | 2.75 | 0.1084 |
| 14 | 1.99 | 0.0785 |
| 16 | 1.61 | 0.0635 |
| 18 | 1.31 | 0.0516 |
| 20 | 1.01 | 0.0396 |
| 21 | 0.93 | 0.0366 |
| 22 | 0.85 | 0.0336 |
| 23 | 0.78 | 0.0306 |
| 24 | 0.7 | 0.0276 |
| 25 | 0.63 | 0.0247 |
| 26 | 0.55 | 0.0217 |
| 27 | 0.51 | 0.0202 |
| 28 | 0.47 | 0.0187 |
| 30 | 0.4 | 0.0157 |
| Standard | GB/T 2518 | EN10346 | JIS G 3141 | ASTM A663 |
| Grade | DX51D+Z | DX51D+Z | SGCC | CS Type C |
| DX52D+Z | DX52D+Z | SGCD1 | CSTypeA.B |
| DX53D+Z | DX53D+Z | SGCD2 | FS Type A, B |
| DX54D+Z | DX54D+Z | SGCD3 | DDS Type C |
| S250GD+Z | S250GD+Z | SGC340 | SS255 |
| S280GD+Z | S280GD+Z | SGC400 | SS275 |
| S320GD+Z | S320GD+Z | - | - |
| S350GD+Z | S350GD+Z | SGC440 | SS340 Class4 |
| S550GD+Z | S550GD+Z | SGC590 | SS550 Class2 |
Hot-dip galvanized sheet is made by immersing the steel sheet in a molten zinc bath at about 500 °C to attach a zinc layer to the surface. This is the continuous galvanizing process. It will form a protective zinc layer on the surface so that it has good paint adhesion and weldability. It is the most widely used and cost-effective method to prolong the service life of steel sheets. .
Electro-galvanized Steel Sheet
Electro-galvanizing, also known as cold galvanizing, uses electrolysis to form a uniform and dense layer on the surface of the metal. The anti-corrosion zinc layer can protect steel parts from oxidation corrosion. Also, it can meet decorative purposes. But the zinc layer of the electro-galvanizing steel sheet is only 5-30 g/m2. So its corrosion resistance is not as good as hot-dip galvanized sheets.
Difference Between Hot-Dip and Electro-galvanized Steel Sheets
Anti-corrosion
The zinc coating thickness is one of the most important factors matters corrosion resistance. The greater the zinc layer thickness, the better the corrosion resistance. Generally, the thickness of hot-dip zinc coating is more than 30 g/m2, or even as high as 600 g/m2. While the electro-galvanized zinc layer is only 5~30 g/m2 thick. So the former steel sheet is much more corrosion resistant than the latter one. At Wanzhi Steel, the maximum zinc layer is 275 g/m2 (z275 galvanized steel sheet).
Method of Operation
The hot-dip galvanized steel sheet is galvanized in a molten zinc bath at about 500 degrees, while the electro-galvanized steel sheet is processed at room temperature by electroplating or other methods. That's why electro-galvanizing also refers to the cold galvanizing process.
Surface Smoothness & Adhesion
The surface of the electro-galvanized steel sheet looks smoother than hot-dip galvanized sheets. But its adhesion is not as good as that of the hot-dip galvanized sheet. If you want only one side galvanized, you can choose the electroplating method. However, if adopting hot-dip galvanizing, both sides are coated with a zinc layer fully.APPLICATION
Types of GI Sheets
In terms of the manufacturing process, we divide it into hot-dip galvanized steel sheets and electro-galvanized steel sheets. Hot-dip galvanized sheet is mainly used in construction, home appliances, automobiles, light industry, and other industries. Below are more details for your reference.Recommended Products
Company Profile
Shandong Zhongtong Boda Steel Co., Ltd has been engaged in steel production and sales for many years. It mainly produce and sell pipe materials (stainless steel pipe, seamless pipe, precision pipe, alloy pipe, carbon steel pipe, seamless square rectangular pipe, straight seam welded pipe, spiral welded pipe, galvanized pipe, steel plastic pipe, greenhouse pipe), plate (common plate, cold plate, alloy plate, stainless steel plate, galvanized sheet), profile (flat steel, angle steel, round steel, I-beam, channel steel) and copper alloy, aluminum alloy materials and large-scale comprehensive enterprises.
With a complete and scientific quality management system, it now has 4 domestic advanced cold drawn seamless steel pipe production lines, 4 hot-rolled seamless steel pipe production lines, 30 sets of finishing rolling seamless steel pipe production lines, 1 seamless rectangular tube production line, 2 straight welded pipe production lines, 2 square rectangular pipe production lines, 2 spiral pipe production lines, 1 galvanized pipe production line, which can produce various specifications and materials annually.
The company has business relations with Baosteel, Baotou Steel, Angang, Yegang, Henggang, Pangang, Tiangang, Anyang, WISCO, Shagang, Shangang, Handan steel, Maanshan Iron and Steel Co., Ltd., Masteel, NISCO and so on. The total stock of all kinds of steel is up to 100000 tons. All products are in accordance with the national and European standards.
With 20 years experience of steel industry, we supplied trading companies and domestic market quality steel products. We are dedicated to meeting our customers steel requirements. With our conscientious approach, excellent customer service and utmost customer satisfaction as the guiding force, we believe our company will grow by leaps and bounds.Packaging & Shipping
FAQ
Q:May I have an inspection of your factory?
A:Sure, you're welcome any time.
Q:Can I personalize the product?
A:The minimum order quantity is more than 10 tons, we can meet your personalized requirements.
Q:How I believe you?
A:We consider honest as the life of our company, Besides, there is trade assurance from Alibaba, your order and money will be well guaranteed.
Q:What is your delivery time?
A:We are based on the quantity of products to determine the delivery time, you can consult us for the answer.
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