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G550+AZ (S550GD+AZ) Galvalume Steel Coil
G550+AZ, equivalent to S550GD+AZ under EN 10346, is the full-hard high-strength galvalume steel coil and the top mandatory grade for roofing projects overseas. It features ultra-high yield strength and excellent rigidity, keeping roof panels flat and resistant to sagging and deformation under wind load. It is widely specified by engineering contractors in Australia, Brazil and the Middle East for trapezoidal roof sheets and standing seam metal roofing. The 55% Al-Zn alloy coating delivers stable rust protection for long-term outdoor exposure.
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■ Product Advantages
G550+AZ full hard aluzinc coil is engineered specifically for structural roofing roll forming. Its high rigidity prevents roof panels from bending or sagging after installation even under strong wind and heavy thermal expansion. It maintains good coating integrity during simple roll profiling, ideal for large factory, warehouse and commercial roof projects. This grade is a standard requirement for many Australian and Brazilian building codes, preferred by roofing manufacturers who prioritize stable panel geometry.
Send your inquiry now with thickness, width, AZ coating weight and target market requirements, our sales term will offer best quote for you soon.
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■ FAQ
Q：
How to improve the corrosion resistance of aluminum?
A：
We provide 5-series anti-rust aluminum and high weather-resistant surface treatments. Custom solutions are available for coastal and harsh working environments.
Q：
What is your MOQ and production lead time?
A：
Flexible MOQ for regular and custom orders. Standard lead time is 7-25 days, and expedited delivery is available.
Q：
Which international standards do your products follow?
A：
All aluminum products comply with ISO, EN and ASTM standards. MTC, SGS and third-party inspection reports can be provided.
Q：
Do you support customized aluminum products?
A：
Yes. We provide one-stop customized services for size, thickness, shape, surface treatment and deep processing.
Q：
What surface finishes can you provide?
A：
Multiple options are available, such as anodizing, electrophoresis, powder coating, PVDF fluorocarbon coating, brushed and matte finish with custom colors.
Q：
What’s the difference between 6061-T6 and 6063-T5 aluminum?
A：
6061-T6 delivers high strength and great machinability for industrial structural parts. 6063-T5 has excellent surface performance, perfect for architectural and decorative applications.
Q：
What aluminum alloy series do you offer?
A：
We supply complete aluminum alloy series including 1xxx, 2xxx, 3xxx, 5xxx, 6xxx and 8xxx series. Custom alloy grades and specifications are also available.
Q：
What industries are your aluminum materials widely used in?
A：
Our aluminum sheets, profiles, bars and tubes are widely used in construction, machinery, new energy, transportation, marine and electronic industries.
Q：
What shipping and trade terms do you accept?
A：
We support global shipping with FOB, CIF, DDP and other trade terms, adopting export-grade packaging for long-distance transportation.
Q：
Can you provide professional technical and after-sales support?
A：
We offer professional technical guidance and reliable after-sales service. All quality issues will be handled with effective solutions in time.
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Mingtai Aluminum Limited