1. Product Overview
Hot Dip Galvanized GI Steel Sheet BWG 34 is a high-performance metal product engineered for long-term durability and corrosion resistance. Manufactured through the hot dip galvanizing process, this steel sheet undergoes immersion in molten zinc, forming a robust protective layer that safeguards against environmental degradation. With a thickness of approximately 0.18 mm (BWG 34) and zinc coating weights ranging from 30–275 g/m², this product balances lightweight design with structural integrity.
Parameter | Value |
Thickness | 0.18 mm (BWG 34) |
Zinc Coating | 30–275 g/m² (Z30–Z275) |
Width | Customizable (typically 600–1250 mm before corrugation) |
Length | 1–12 meters (customizable) |
Surface Finish | Regular spangle, minimal spangle, zero spangle |
Standards | ASTM A653, EN 10346, JIS G 3302 |
This sheet is available in various grades (e.g., SGCC, DX51D+Z) and can be customized for specific applications, including corrugated roofing, automotive components, and industrial machinery.
2. Features
2.1 Superior Corrosion Resistance
The hot dip galvanizing process creates a zinc-iron alloy layer that acts as a sacrificial barrier, protecting the steel from rust and corrosion even in harsh environments. With a zinc coating of 275 g/m², the sheet can withstand up to 80 years of service life in moderate climates.
2.2 Uniform Coating and Form ability
The molten zinc bath ensures uniform coating distribution, enhancing both aesthetic appeal and functional performance. The sheet's low friction surface facilitates easy bending, cutting, and welding, making it suitable for complex fabrication projects.
2.3 High Tensile Strength
With a tensile strength of 270–500 MPA, this steel sheet offers excellent load-bearing capacity while maintaining flexibility. It meets the demands of structural applications in construction, automotive, and industrial sectors.
2.4 Eco-Friendly Design
GI steel sheets are 100% recyclable without compromising material properties. The zinc coating also reduces the need for frequent maintenance, minimizing environmental impact over the product's lifecycle.
2.5 Versatile Surface Treatments
Available surface finishes (e.g., chromated, oiled, passivated) provide additional protection against moisture and UV radiation, making the sheet suitable for both indoor and outdoor use.
| item | value |
| Place of Origin | China Shandong |
| Brand Name | GUOGANG |
| Application | construction, light industry, automobile, agriculture, animal husbandry, fishery and commercial industries |
| Standard | a653, a792, jis g3302, en10142, en1012 |
| Thickness | 0.12-5.0mm customized |
| Width | 600-1500mm custom |
| Length | 1-12m as buyer needs |
| Spangle | Big Regular Small Zero |
| Certificate | CE, SGS, ISO9001 |
| Grade | SGCC SGCH SGC340 SGC400 SGC440 SGC490 SGC570 |
| SGHC SGH340 SGH400 SGH440 SGH490 SGH540 |
| DX51D DX52D DX53D DX54D DX55D DX56D DX57D |
| S220GD S250GD S280GD S320GD S350GD S400GD S500GD S550GD |
| Zinc coating | 30g/m2 to 275g/m2 |
| Coil Weight | 3-8 Tons |
| Coil ID | 508mm or 610mm |
| Surface treatment | Unoil, Dry, Chromate Passivated, Non-chromate Passivated |
| Delivery time | 7-15 days, for stock size and customized size, please chat with our sales person |
| Capacity | 500,000MT/year |
3. Applications
3.1 Construction Industry
• Roofing and Siding: Corrugated GI sheets are widely used for residential, commercial, and industrial roofing due to their lightweight design and weather resistance.
• Structural Components: Ideal for steel framing, support columns, and cladding in high-rise buildings and bridges.
• Prefabricated Structures: Used in modular homes and temporary shelters for quick installation and durability.
3.2 Automotive Sector
• Body Panels and Chassis: The sheet’s corrosion resistance and formability make it suitable for automotive parts exposed to road salt and moisture.
• Exhaust Systems: Resistant to high temperatures and chemical corrosion, ensuring long-term performance.
3.3 Industrial and Agricultural Use
• Machinery and Equipment: Used in the manufacturing of conveyor belts, storage tanks, and agricultural machinery.
• Greenhouses and Fencing: Protects against rust in humid environments, extending the lifespan of agricultural structures.
3.4 Energy and Infrastructure
• Solar Panel Supports: Resistant to outdoor elements, ensuring reliable performance in solar energy projects.
• Pipeline Protection: Galvanized steel pipes are used for water and gas distribution, offering long-term corrosion resistance.
4. FAQ
What is the thickness of BWG 34 GI steel sheet?
BWG 34 corresponds to a thickness of 0.18 mm (0.007 inches). This gauge is commonly used for lightweight applications requiring moderate strength.
What is the typical zinc coating weight?
Zinc coating weights range from 30–275 g/m² (Z30–Z275), with higher weights (e.g., Z275) providing enhanced corrosion resistance for coastal or industrial environments.
Is this product certified?
Yes, it complies with international standards such as ASTM A653, EN 10346, and JIS G 3302. Many manufacturers also hold ISO 9001 certification for quality management.
Can the sheet be customized?
Yes, customization options include width, length, surface finish, and zinc coating weight. Corrugated profiles and pre-painted finishes are also available upon request.
How is the product packaged?
Standard packaging includes three layers of protection: an inner kraft paper layer, a middle waterproof plastic film, and an outer galvanized steel sheet secured with steel strips. Palletized bundles (2–4 tons) ensure safe transportation.
