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Galvalume Steel Coil Galvalume Sheet
55% aluminum-zinc alloy coating
Aluminum (55%): forms a dense, stable aluminum oxide protective layer, providing excellent atmospheric corrosion resistance (including industrial atmosphere and marine atmosphere), excellent high temperature oxidation resistance (can withstand high temperatures of up to about 315°C, far better than galvanized sheet) and excellent chemical corrosion resistance (especially resistance to sulfur-containing atmosphere).
Zinc (43.5%): provides excellent cathodic protection (sacrificial anode) function. Even if the coating is scratched or the cutting edge is exposed, zinc can corrode preferentially and protect the steel substrate underneath from erosion.
Silicon (1.5%): plays a key bridge role! Promotes the metallurgical bonding between the aluminum-zinc alloy and the steel substrate, ensures that the coating has strong adhesion, is not easy to crack or peel off during processing and forming (such as stamping, bending), and improves processing performance and service life.
Doubled lifespan
Under the same environment and use conditions, the design service life of galvalume sheet is usually 2 times or even 6 times that of ordinary hot-dip galvanized steel sheet.
Energy saving
The silvery white surface can effectively reflect solar radiation heat, significantly reduce the surface temperature of buildings (especially roofs and walls), and reduce the cooling load of air conditioners.
Beautiful and durable
The surface is uniform and delicate, with a unique bright silver metallic luster (color coating can also be applied), and it is not easy to darken and discolor after long-term use.
Strong and reliable
The substrate is made of high-quality cold-rolled or hot-rolled steel plate, combined with a coating with super strong adhesion, ensuring that the material has excellent strength and rigidity.
Wide application
Construction and building materials (core applications)
High-end roof panels & wall panels: large factories, logistics warehouses, airport terminals, stadiums, commercial centers, exhibition halls, etc., providing ultra-long life guarantee and excellent waterproof and windproof performance.
Light steel structure buildings: load-bearing or enclosure components such as purlins, wall beams, floor panels, etc., are lightweight, high-strength and corrosion-resistant.
Architectural decoration: curtain wall lining, ceiling, water system (gutter, downpipe), ventilation duct (weather-resistant and corrosion-resistant).
Floor decking: galvalume steel coil is used in combination with concrete, which is quick to construct, high in strength, and corrosion-resistant on the surface without additional treatment.
Home appliance manufacturing
Large appliance housings and internal parts: refrigerators, freezers, washing machines, dryers, air conditioner outdoor units, water heaters, ovens, microwave ovens, range hoods, etc., provide excellent anti-rust protection and beautiful substrates.
Small appliances: heaters, electric heaters, water dispensers, etc.
Automotive industry
Exhaust system components: muffler housing, tail pipe (taking advantage of its high temperature and corrosion resistance).
Fuel tank: Some designs are used.
Underbody protection: Some dust covers and guard plates.
Agricultural and animal husbandry facilities
Animal farm buildings: Roofs and walls of pig houses, chicken houses, and cow sheds, especially resistant to corrosive environments such as ammonia.
Granaries and silos: Protect stored items from wind and rain.
Industrial equipment
Instrumentation cabinets: power cabinets, communication cabinets, control cabinets, etc.
Industrial ventilation and dust removal equipment: air ducts, fan housings.
How to choose galvalume steel?
1. Focus on core parameters
Coating weight/thickness (g/m² or µm): This is the key indicator that determines the corrosion resistance life! Common specifications include AZ150 (150g/m², double-sided total, about 20μm single-sided average thickness), AZ100, AZ180, etc. The harsher the environment, the thicker the required coating should be. Clarify the environmental requirements of your project (C1-C5 corrosion level).
Substrate material and thickness: Select the appropriate grade (such as DX51D+AZ, DX52D+AZ, DX53D+AZ, etc., the larger the number, the better the formability) and thickness (mm) according to the load-bearing requirements.
Surface treatment:
Smooth: Standard bright silver, high reflectivity.
NFP: The surface is coated with an extremely thin organic film to enhance resistance to minor scratches and fingerprints, and improve the subsequent coating or adhesive performance.
Oiled: Anti-rust oil is applied to prevent rust during transportation and short-term storage.
Mechanical properties: Yield strength, tensile strength, elongation, etc., selected according to processing and service requirements.
Surface quality grade: Such as FC (common grade), FD (stamping grade), which affects the appearance and deep drawing performance.
Brand and reputation: Choose well-known steel mills or their core agents to ensure stable materials, reliable processes, and quality assurance. We have established strategic cooperation with the world's top steel mills to ensure a stable supply of goods.
Technical strength and service: Suppliers should be able to provide professional material selection suggestions, processing technology support, and complete pre-sales and after-sales services.
Certification and standards: Ensure that products comply with relevant international (such as ASTM A792/A792M, EN 10346) or national standards (such as GB/T 14978).
Beyond Cost
Significantly reduce maintenance costs: A longer service life means less renovation, repair or replacement costs, saving a lot of manpower and material resources.
Reduce downtime losses: For industrial plants and production equipment, maintenance downtime caused by corrosion will bring huge economic losses. GL's reliability ensures continuous operation.
Improve asset value: Buildings or equipment using high-performance materials have higher long-term value and use value.
Contribution to energy conservation and environmental protection: High reflectivity reduces energy consumption, and long life reduces resource consumption and waste disposal, which is in line with the concept of sustainable development.
Enhance brand image: The long-lasting appearance shows the company's pursuit of quality and long-term development.
Galvalume steel coil is not only a material, but also a smart investment for the future. It uses a scientifically formulated alloy coating to give steel a strong armor to resist the passage of time.
With excellent performance and unparalleled cost advantages throughout the life cycle, it protects your building safety, improves your product quality, and guarantees your return on investment.
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