Products Description
Aluminum zinc alloy coated steel sheet in coil S350GD+AZ is a commonly used building material, and its material properties and applications are widely used in different fields.
In specific applications, S350GD+AZ aluminum zinc alloy coated steel sheet in coil is usually used in places that require high strength and good corrosion resistance, such as construction, automobile manufacturing, home appliances and other fields.Its aluminum-zinc alloy coating is not only beautiful but also can effectively resist atmospheric corrosion, water corrosion, etc., and protect the steel substrate from damage.
Specification
| Property | Value |
|---|---|
| Coating Type | Aluminum-Zinc Alloy (AZ) |
| Coating Weight | 100-200 g/m² (customizable) |
| Surface Finish | Smooth, spangled, or customized |
| Thickness | 0.3mm to 2.5mm |
|---|---|
| Width | 600mm to 1500mm |
Galvalume Steel's surface treatment
|
Chromate passivation |
A surface treatment method used after aluminum-zinc alloy coating high-strength steel sheets to reduce white rust during transportation and storage |
|
Chromium-free passivation |
It requires the restriction of the use of surface treatments in passivation liquids that are harmful to the environment and human body, such as hexavalent chromium |
|
resistant |
The surface treatment method after the passivation process acts as a lubricant during processing, preventing fingerprints from staining the surface during operation and preventing premature blackening of the surface during use |
|
Fingerprint-resistant without chrome |
Limits the content of environmentally and human-harmful hexavalent chromium in fingerprint-resistant liquids |
|
Oil |
Surface treatment methods that reduce corrosion during long-distance transportation and long-term storage |
Composition
Ordinary galvanized sheets often rust in 3-5 years in coastal or industrially polluted areas, while S350GD+AZ aluminum zinc alloy coated steel sheet in coil uses 55% aluminum + 43.4% zinc + 1.6% silicon alloy coating technology to improve the anti-corrosion performance to 2-6 times that of ordinary galvanized sheets, making it the preferred material for high-end projects.
| C | Si | Mn |
|---|---|---|
| ≤0.25% | ≤0.6% | ≤1.7% |
| P | S |
|---|---|
| ≤0.1% | ≤0.045% |
In the fields of industrial construction, warehousing and logistics, agricultural facilities, etc., the weather resistance and service life of steel directly affect the project cost.
How to choose the appropriate specifications?
1. Environmental adaptation principle
C1-C2 environment (ordinary inland): AZ70-100
C3-C4 environment (industrial/coastal): AZ120-150
C5 environment (high corrosion area): AZ150+passivation treatment
2. Mechanical properties matching
Single-story building: S250GD+AZ
Long-span structure: S350GD+AZ
Heavy-duty plant: S550GD+AZ
3. Processing technology recommendations
Stamping: Recommended coating below AZ100
Roller forming: Adapt to all coating specifications
Welding processing: Plating compensation amount needs to be reserved
Packaging and Shipping
FAQ
1. What are the common applications of Galvalume?
It is primarily used for metal roofing, wall panels, grain silos, automotive parts, and household appliances (like ovens and refrigerators) due to its heat resistance.
2. Does Galvalume reflect heat?
Yes, Galvalume has high solar reflectivity. It reflects a significant amount of solar radiation, which helps keep buildings cooler and reduces energy costs in the summer.
3. Can Galvalume be used with pressure-treated wood?
No. The chemicals in modern pressure-treated lumber (like copper) react electrolytically with the Galvalume coating, leading to rapid corrosion. Use a barrier or choose different materials.
4. Is Galvalume steel environmentally friendly?
Yes, it is 100% recyclable. Additionally, its long lifespan and energy-saving reflective properties make it a sustainable choice for "green" building.
5. What is the standard thickness (gauge) for Galvalume roofing?
The most common gauges for residential and commercial roofing are 24 gauge and 26 gauge, though it is available in thinner or thicker options depending on the structural needs.
6. What does the "55% Al-Zn" mean?
It refers to the weight ratio of the coating. The 55% aluminum provides a durable barrier against the elements, while the zinc ensures that if the steel is scratched, the coating "sacrifices" itself to protect the exposed metal.
7. Can Galvalume handle high temperatures?
Yes. Galvalume can withstand temperatures up to 315°C (600°F) without discoloration and even higher temperatures before the coating is compromised, making it ideal for flue pipes and appliances.
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