Basic Info.
After-sales Service
1year
Standard
ASTM, AISI, GB, JIS, DIN, BS
Certification
ISO, RoHS, IBR
Technique
Hot Rolled /Cold Rolled
Application
Mold & Dies, Ship Plate, Boiler Plate, Container Plate, Flange Plate
Special Use
Cutting Tools, Measuring Tools, Cutters in Common Steel, High-strength Steel Plate, Wear Resistant Steel
Zinc Coating Weight
30G/M2-600G/M2,Double Side
Spangle
Regular Spangle, Minimal Spangle, Zero Spangle
Surface
Cheomated/Non-Chromated,Non Oiled/Oiled,Anti Finge
Grade
SGCC Dx51d+Z, SGCC/Sgch/SPCC/Spcd/Spce
Length
1000-8000mm.as Required
Width
30mm-2050mm,as Required
Temper
Full Hard, Half Hard, Sort
Transport Package
in Bulk, in Bunddle, in Water Proof Plastic Wrrapp
Specification
As required
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 Steel Sheet
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.
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.
Address:
Room 1906, No. 20, Dongting Middle Road, Xishan District, Wuxi, Jiangsu, China
Business Type:
Manufacturer/Factory, Trading Company, Group Corporation
Business Range:
Metallurgy, Mineral & Energy
Management System Certification:
ISO 9001, ISO 9000, BSCI, QHSE
Company Introduction:
DELONG Steel is group company in the steel manufacture & Trading, founded in the2010s, 500+ staff, 20, 000+ m2 non-dust workshop, 30+ great large mills and cooperation partners in China, 3000, 000+ MT production per year under ISO CE management, 30, 000+customers in domestic and overseas market, 10 billion USD of annual turnover, 12+ subsidiary companies all over China, ranking the Top 100 private enterprises in China, 1 hour reach Shanghai/Tianjin /Guangzhou Port, we keep high quality, competitive price, thousands tons of stock, most efficient delivery and reliable cooperation for global valued customers. We have been engaging industry steel for over 10 years, best service and the most competitive price is one of our greatest advantages that make us today!
From our head office in Wuxi, Jiangsu Province, we have provided products and services to multiple sectors that span over 50 countries worldwide. There is no limit to our reach as we continue to develop within growing markets and territories.
We supply products that support a diverse and wide assortment of industries including oil and gas, automotive, chemical and construction. We are constantly looking to innovate with our extensive range of suppliers to offer products and solutions that are not only unique in their design but competitive in their price.
We are proud to work closely with industry and academic partners to continually improve our products and services, as a result, we have patented products designed to save you time and money.
We operate within the scope of ISO 9001: 2015 accredited management system and the raw materials are procured from suppliers in compliance with ASTM, BS EN and DIN standards.
Our products are rigorously inspected to ensure they are within tolerance of our customer′s specifications, we work with accredited laboratories for specialised material testing and chemical analysis.
In addition, we use X-ray fluorescence technology to meet our high inspection standards and to ensure that our customers get the best quality products.