Product Overview
The production process of aluminum-zinc coated steel coil employs continuous hot-dip galvanizing technology, forming a uniform and dense alloy protective layer on the steel surface. The alloy coating consists of 55% aluminum, 43.5% zinc, and 1.5% silicon. This unique composition provides the material with excellent overall performance. In practical applications, the aluminum-zinc coated steel coil can be used directly or serve as a substrate for further processing into pre-painted panels, meeting diverse market demands at various levels.
Compared to traditional galvanized products, aluminum-zinc coated steel coils offer significant advantages in corrosion resistance, heat resistance, and thermal reflectivity. The product thickness ranges from 0.12mm to 1.0mm, with width adjustable flexibly between 30mm and 1250mm, meeting diverse processing requirements. The zinc coating weight is controlled within the range of 40–275g/㎡, providing corresponding corrosion protection levels tailored to different application environments.
Core Product Advantages
1. Industry-Leading Corrosion Protection
Independent third-party salt spray tests conducted in accordance with ASTM B117 standard confirm our GL coils deliver 3-6 times longer corrosion resistance than conventional galvanized steel. In rural environments, they provide a minimum 35-year service life; in moderate industrial and coastal areas, they maintain structural integrity for 15-20 years; and in severe corrosive environments with proper maintenance, they last 10-15 years-reducing long-term replacement costs by up to 60% over the project lifecycle.
2. Exceptional High-Temperature Stability
Our galvalume steel retains 90% of its mechanical properties at continuous operating temperatures up to 315°C, compared to just 120°C for galvanized steel. This makes it ideal for high-temperature applications such as industrial furnace enclosures, chimney linings and solar panel mounting systems. It also reflects 82% of solar radiation, lowering building cooling costs by an average of 18% compared to dark-colored roofing materials.
3. Superior Formability & Processing Flexibility
The uniform alloy coating allows for deep drawing, roll forming, bending and stamping without coating damage. We offer three tailored hardness grades to meet exact application requirements:
Soft grade (HRB ≤ 60): Optimized for complex deep-drawing operations in home appliance manufacturing
Medium-hard grade (HRB 60-85): Balanced strength and formability for general roofing and wall cladding
Full-hard grade (HRB 85-95): High tensile strength for structural load-bearing applications such as purlins and solar mounts
4. Precision-Manufactured Quality
All our GL coils are produced on fully automated production lines with ±0.02mm thickness tolerance and ±1mm width accuracy. This ensures seamless integration with downstream processing equipment, minimizing material waste and production downtime. Every coil undergoes 100% surface inspection using advanced optical systems to eliminate defects such as scratches, pits and coating unevenness.
Product parameter details
| Product Name | Galvalume Steel Coil |
| Thickness | 0.12mm-1.0mm |
| Width | 700-1250mm |
| Content | 55% alu,43.5%zinc,1.5% Si |
| Standard | ASTM, AISI, GB, JIS |
| Coil ID | 508/610 mm |
| Coil Weight | 3-5 tons or as your requirement |
| Origin | China |
Application scenarios
In the industrial construction field, aluminized zinc steel sheets are mainly used for factory building roofs, wall enclosure systems, and enclosure panels for steel structures. In agricultural facilities, they are widely applied in greenhouse frame structures, livestock sheds construction, etc., in places that require long-term resistance to damp and corrosive environments. In the home appliance manufacturing industry, aluminized zinc steel sheets are used as the outer shell materials for ovens, microwave ovens, water heaters, etc., taking advantage of their high-temperature resistance and corrosion resistance properties.
In the transportation sector, the products are used in the manufacturing of automotive parts, container bodies, railway vehicles, etc. In public buildings, large-scale buildings such as stadiums, exhibition halls, and airport terminals extensively adopt aluminized zinc steel sheets for their roof systems. Additionally, in solar panel supports, ventilation ducts, and storage shelves, aluminized zinc steel sheets are also widely used.
productive process
Packaging and Delivery
The product is packaged in standard export packaging. The inner layer is protected against moisture with moisture-proof paper and plastic film, while the outer layer is fixed with steel bands to ensure that the product is not damaged during transportation. Each steel coil is accompanied by clear product labels, including specifications, batch numbers, weights, etc. Special requirements can be met with wooden pallet packaging or fumigation treatment to comply with the import requirements of different countries.
The shipping ports are Qingdao Port and Tianjin Port in China. These two ports have a complete international logistics network and can quickly reach major ports around the world. The delivery period for regular orders is 7-15 days, and custom products are arranged according to the production plan. The annual production capacity of 200,000 tons ensures stable supply capacity and supports the timely delivery of large quantities of orders. The minimum order quantity is 5 tons, and flexible purchasing plans are supported.
Authoritative qualification certification and service support
The product has passed the ISO9001 quality management system certification and has received detection certifications from international authoritative institutions such as CE, SGS, and BV, meeting the requirements of RoHS and REACH environmental protection standards. All factory products come with quality guarantee certificates and test reports, ensuring that the product performance complies with technical specifications.
A professional technical team provides pre-sales consultation services, recommending suitable product specifications based on the specific application scenarios of customers. After-sales support includes technical guidance, handling of quality issues, and other comprehensive services. The production process is fully traceable, and complete production records and test data are retained for each batch of products. Regular customer follow-ups are conducted to collect usage feedback and continuously improve product quality and service levels.
Common Questions Answered
Q: What are the differences between aluminized zinc steel coils and ordinary zinc-coated steel coils?
A: The aluminized zinc steel coils are coated with an alloy of 55% aluminum, 43.5% zinc, and 1.5% silicon, while the ordinary zinc-coated steel coils are coated with pure zinc. The main difference between the two lies in their corrosion resistance. The corrosion resistance of aluminized zinc steel coils is 2-6 times that of ordinary zinc-coated steel, and they have a longer service life. Additionally, aluminized zinc steel coils also have better high-temperature resistance and heat reflection capabilities.
Q: Can aluminized zinc steel coils be processed by welding?
A: Yes, they can be processed by welding.
Q: What is the minimum order quantity for the product?
A: The minimum order quantity for regular products is 5 tons. For new customers or for testing purposes, small batch trial orders are supported. The specific quantity can be determined based on actual needs through negotiation.
Q: What is the delivery cycle for the product?
A: The delivery cycle for regular specifications is 7-10 days, and for custom-made products with special specifications, it is 10-15 days. Large-volume orders are arranged according to the production plan, and the specific delivery time will be clearly informed upon order confirmation.
Q: Does the product support customized production?
A: Yes, we fully support customized production. Based on the customer's drawings or samples, the size, thickness, zinc layer weight, surface treatment method, etc. of the product can be adjusted. It can also be color-matched according to RAL or Pantone color cards to meet the design and performance requirements of different projects.
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