Products Description
DX51D + AZ150 galvalume steel coils is a premium hot-dip coated steel coil, combining the strength of DX51D base steel with the protective AZ150 aluminum-zinc coating. The DX51D base metal (steel number 1.0917) features a chemical composition of ≤0.18% carbon, ≤1.20% manganese, and ≤0.12% phosphorus, adhering to the BS EN 10346:2015 standard for continuously hot-dip coated low-carbon products.
The AZ150 coating refers to a nominal coating weight of 150 g/m² per double side, with a single-side thickness of approximately 20 μm, forming a dense quaternary crystal structure that provides dual protection against corrosion.
This combination makes the DX51D AZ150 galvalume steel coils suitable for both indoor and outdoor applications, even in harsh environments such as coastal areas and industrial zones.
DX51D +AZ150 Equivalent Grade
| Standard System | Equivalent Grade | Description |
| European Standard (EN 10346) | DX51D+AZ150 | Original standard grade |
| American Standard (ASTM A792/A792M) | AZ50 (Class 1 or 3) | The number after AZ in the U.S. standard represents the coating weight per side (oz/ft²). AZ50 is approximately equivalent to AZ150 (g/m²). |
| Internationally Recognized | Galvalume® | "Galvalume AZ150" is a widely recognized name. |
Specifications
| Parameter | Specification |
| Substrate Grade | DX51D (Low carbon steel for stamping and deep drawing) |
| Nominal Thickness | 0.15 mm – 6 mm (Common specifications: 0.4mm, 0.5mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, 2.0mm) |
| Thickness Tolerance | Complies with EN 10346 PT.B grade (higher precision) or PT.A grade |
| Nominal Width | 600 mm – 1250 mm |
| Inner Diameter (I.D.) | 508 mm (20″) or 610 mm (24″) |
| Outer Diameter (O.D.) | Typically up to 1200mm – 1500mm |
| Coating Type | AZ (55% Aluminium, 43.4% Zinc, 1.6% Silicon) |
| Coating Code | 150g/m² |
| Surface Structure | Regular Spangle |
| Color | Silver-white/Light gray |
| Surface Treatment | Cr-Free Passivation, Oiled, or Anti-Fingerprint |
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Application Scenarios of DX51D + AZ150 Galvalume Steel Coils
With its versatile performance, DX51D + AZ150 galvalume steel coils is widely used in various industries, providing reliable solutions for multiple scenarios:
1. Construction Industry
Ideal for roofing sheets, wall cladding, gutters, downspouts, modular houses, warehouses, and steel structures. Its excellent corrosion resistance and weatherability make it suitable for both residential and commercial buildings, even in coastal or industrial areas.
2. Automotive Industry
Used for cold-forming components such as mufflers, exhaust pipes, fuel tanks, truck boxes, and chassis parts. The superior corrosion protection and wear resistance ensure long-term service in harsh automotive environments.
3. Household Appliances
Suitable for refrigerator backplanes, air conditioner housings, ovens, microwave casings, and electrical cabinets. The smooth surface and good paint adhesion make it an ideal material for aesthetic and functional appliance components.
4. Agricultural Industry
Applied in barns, granaries, greenhouses, and agricultural equipment. Its corrosion resistance and durability can withstand the humid and corrosive agricultural environment, reducing maintenance costs for farmers.
5. Other Industries
Also used in solar panel mounting systems, heat exchangers, chimney pipes, fluorescent lamp shades, and industrial instruments, thanks to its heat resistance, conductivity, and formability.
DX51D AZ150 vs DX51D Z150
| Feature Comparison | DX51D+AZ150 (Aluzinc AZ150) | DX51D+Z150 (Pure Zinc) |
| Coating Composition | 55% Al, 43.4% Zn, 1.6% Si | 99%+ Zn |
| Corrosion Mechanism | Dense Al₂O₃ oxide layer + Sacrificial Anode (Zn) | Sacrificial Anode (Zn) |
| Corrosion Resistance | Extremely high. 2-6 times higher than Z150 | Good |
| Heat Resistance | Excellent | Poor |
| Heat Reflectivity | High | Moderate |
| Appearance | Silver-white, fish-scale crystalline (Spangle) | Silver-gray, more prominent crystalline pattern |
| Formability | Good | Excellent |
| Edge Protection | Moderate | Excellent |
| Cost | High | More economical |
Frequently Asked Questions (FAQ)
1. What is DX51D + AZ150 galvalume steel coils?
DX51D + AZ150 galvalume steel coils is a hot-dip aluminum-zinc coated steel coil, where DX51D is the base steel grade (low-carbon steel with high formability) and AZ150 refers to a 150 g/m² double-side aluminum-zinc coating (55% Al, 43.4% Zn, 1.6% Si), providing superior corrosion and heat resistance.
2. What is the service life of DX51D + AZ150 galvalume steel coils?
In a normal environment (C2), the technical service life is over 25 years. In harsh environments (such as coastal areas or industrial zones), it can still be used for 15-20 years, which is 2-6 times longer than traditional galvanized steel.
3. Can DX51D + AZ150 galvalume steel coils be painted?
Yes. The AZ150 coating has excellent adhesion to paint films, so it can be painted directly or after simple surface treatment. Painted galvalume steel coils have better aesthetic performance and can further enhance corrosion resistance, making them suitable for projects with high appearance requirements.
4. What standards do your DX51D + AZ150 galvalume steel coils comply with?
Our DX51D + AZ150 galvalume steel coils fully comply with international standards, including ASTM A792 (American standard), EN 10346 (European standard), JIS G3321 (Japanese standard), and GB/T 14978 (Chinese standard), ensuring compatibility with global projects.
5. Do you provide customization for DX51D + AZ150 galvalume steel coils?
Yes. We offer full customization services, including adjustable thickness (0.15-3.0 mm), width (600-2000 mm), coil weight (3-8 tons), surface finish (regular/zero/minimized spangle), and additional treatments (anti-fingerprint, passivation, oiled). We also support OEM/ODM services to meet your specific needs.
6. What is the delivery time for DX51D + AZ150 galvalume steel coils?
The delivery time depends on the order tonnage and customization requirements. For standard specifications, the delivery time is 3-7 days; for customized orders, it is 7-15 days. We ship from Tianjin, Shanghai, Qingdao ports, and can arrange logistics according to your destination.
7. How do you ensure the quality of DX51D + AZ150 galvalume steel coils?
We have a strict quality control system throughout the production process: raw material inspection (base steel quality), coating process monitoring (temperature, coating weight), and final product testing (salt spray test, tensile test, coating adhesion test). Every batch of products is accompanied by a quality inspection report to ensure compliance with standards.
8. Can I get a free sample of DX51D + AZ150 galvalume steel coils?
Yes. We provide free samples (1-2 meters per sample) for you to test quality and performance. You only need to contact us to provide your contact information and sample requirements, and we will arrange the sample delivery as soon as possible.
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