Products Description
G550 Galvalume steel coil is composed of aluminum-zinc alloy structure, which is composed of55% aluminum, 43.4% zinc and 1.6% silicon solidified at 600°C. It is an important alloy materialwhich is often used in our daily life.Galvalume steel coil has many excellent characteristics: strong corrosion resistance, which is 3times that of pure galvanized sheet There are beautiful zinc flowers on the surface, which can beused as exterior panels of buildings.
The G550 Galvalume Steel Coil is a high-performance, high-strength hot-dip coated steel product, engineered to deliver exceptional structural integrity and superior corrosion resistance. As a core product of GNEE STEEL, this coil features a G550 high-strength cold-rolled substrate (minimum yield strength of 550 MPa) and a premium 55% Al-Zn-Si coating (AZ50 to AZ275 customizable), manufactured in strict compliance with ASTM A792, JIS G3321, and EN 10346 standards. Designed for heavy-duty scenarios where strength and durability are non-negotiable, the G550 Galvalume Steel Coil outperforms conventional galvanized and lower-strength galvalume coils, making it the top choice for high-load structural applications, industrial equipment, and harsh-environment construction.GNEE STEEL offers factory-direct supply, flexible customization, and reliable global delivery, ensuring you get high-quality G550 Galvalume Steel Coil that meets your project's most demanding requirements.
Technical Specifications of G550 Galvalume Steel Coil
All G550 Galvalume Steel Coils are produced with advanced continuous hot-dip coating lines, subject to strict quality control and third-party inspection (SGS/BV) to ensure compliance with global standards. Below are the detailed technical parameters:
|
Parameter |
Specification |
Tolerance |
|---|---|---|
|
Grade |
G550 (S550GD+AZ) |
- |
|
Coating Type |
55% Al-Zn-Si (AZ50–AZ275) |
±10% |
|
Standard Coating Weight |
AZ100, AZ150, AZ200 |
±10% |
|
Thickness |
0.3–2.0 mm |
±0.02 mm |
|
Width |
600–1500 mm |
±2 mm |
|
Coil ID |
508 mm / 610 mm |
- |
|
Coil Weight |
3–8 tons |
±5% |
|
Yield Strength (ReL) |
≥550 MPa |
±20 MPa |
|
Tensile Strength (Rm) |
580–700 MPa |
±25 MPa |
|
Elongation (A80mm) |
≥10% |
±1% |
|
Surface Finish |
Regular spangle / Zero spangle, Oiled / Dry / Chromated / AFP |
- |
Coating Chemical Composition
|
Element |
Content |
Function |
|---|---|---|
|
Aluminum (Al) |
55% |
Forms a dense oxide layer for barrier corrosion protection |
|
Zinc (Zn) |
43.4% |
Provides sacrificial anode protection to the steel substrate |
|
Silicon (Si) |
1.6% |
Enhances coating adhesion to the steel substrate, preventing peeling |
Applications of G550 Galvalume Steel Coil
The exceptional strength and corrosion resistance of G550 Galvalume Steel Coil make it suitable for heavy-duty, high-demand applications across multiple industries:
Heavy-Duty Construction: Long-span roofing, purlins, structural frames, steel beams, and prefabricated buildings for commercial warehouses, factories, and large-scale infrastructure projects. Its high strength reduces material thickness requirements, saving costs.
Industrial Manufacturing: Heavy-duty machinery components, storage tanks, silos, ventilation ducts, and electrical enclosures. Ideal for harsh industrial environments with high stress and corrosive factors.
Infrastructure & Transportation: Highway guardrails, bridge components, container parts, and carport structures. Resists outdoor weathering and heavy load pressure.
Coastal & Harsh Environments: Marine equipment, coastal buildings, and offshore structures. The customizable AZ coating weight ensures superior resistance to salt spray and moisture.
Frequently Asked Questions (FAQ)
Q1: What is the core advantage of G550 Galvalume Steel Coil compared to lower-grade galvalume coils?
A: The core advantage is its high strength-G550 grade has a minimum yield strength of 550 MPa, which is significantly higher than G250/G350 grades. This makes it ideal for heavy-duty structural applications that require superior load-bearing capacity and stability, while still maintaining excellent corrosion resistance from the 55% Al-Zn coating.
Q2: What coating weight options are available for G550 Galvalume Steel Coil?
A: We offer customizable coating weights from AZ50 (50 g/m²) to AZ275 (275 g/m²). The most commonly used options are AZ100, AZ150, and AZ200. Higher coating weights (AZ200+) are recommended for harsh environments like coastal areas or industrial zones with high corrosion.
Q3: Can G550 Galvalume Steel Coil be welded and bent easily?
A: Yes. Despite its high strength, G550 Galvalume Steel Coil maintains good ductility, allowing standard welding, bending, and stamping processes. We provide detailed processing guidelines to ensure the coating remains intact during fabrication, avoiding peeling or damage.
Q4: What is the minimum order quantity (MOQ) for G550 Galvalume Steel Coil?
A: The standard MOQ is 25 tons (one full coil). For trial orders or small projects, we can negotiate an MOQ of 10–25 tons based on current inventory and production schedule.
Q5: What is the production lead time for G550 Galvalume Steel Coil?
A: For standard specifications (e.g., AZ150 coating, common thickness/width), the lead time is 15–20 days after deposit confirmation. For customized specifications, the lead time is 20–25 days. Urgent orders can be arranged within 10–15 days if materials are in stock.
Q6: Is G550 Galvalume Steel Coil suitable for pre-painted applications?
A: Absolutely. The smooth surface of the 55% Al-Zn coating ensures excellent paint adhesion, allowing for long-lasting color retention. We recommend chromated or anti-fingerprint (AFP) surface treatment to further improve paint durability, extending the service life of pre-painted products to 15+ years.
Q7: What packaging is used for G550 Galvalume Steel Coil for export?
A: Standard export packaging includes waterproof kraft paper + PE plastic film + metal strapping with edge protectors, which effectively protects the coil from moisture, dust, and damage during sea or land transportation. Custom packaging (such as wooden pallets) is available upon request.
Q8: Does GNEE STEEL provide samples and test reports for G550 Galvalume Steel Coil?
A: Yes. We offer free samples (1–2 meters per sample) for quality testing; customers only need to bear the shipping cost. We also provide detailed test reports (including chemical composition, mechanical properties, and coating quality) with the samples, and third-party test reports (SGS/BV) are available upon request.
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